Pulverized vacuum cleaning device and method of use thereof

Abstract

A pulverizing type vacuum cleaning tool includes an inlet nozzle, a housing, a fan assembly, an outlet nozzle, and a debris collection bag. The housing defines an inlet coupled with the inlet nozzle and an outlet for directing debris out of the housing. The fan assembly is mounted within the housing and is positioned between the inlet and the outlet. The outlet nozzle is coupled with the outlet.

Description

Cross-references to related applications

[0001] This application claims priority to U.S. Application No. 63 / 798,125, filed May 1, 2025, the disclosure of which is incorporated herein by reference in its entirety. Technical Field

[0002] This disclosure generally relates to power tools, such as shredding vacuum cleaners. Background Technology

[0003] Shredder vacuum cleaners are typically used in outdoor environments to handle environmental debris such as leaves and grass clippings. A typical shredder vacuum cleaner uses a fan to generate airflow that draws in debris and forces it through the vacuum cleaner. The debris is then shredded (e.g., crushed) by impeller blades within the vacuum cleaner and deposited in the debris bag.

[0004] Some shredding vacuum systems may present challenges related to ergonomics, debris collection, and performance. For example, the weight distribution and handle placement of certain tools can generate large moments of inertia, making the tools difficult to handle and potentially causing user fatigue. The debris collection containers associated with these systems may also exhibit certain deficiencies. Features such as zippered bag closures can become clogged with debris, and the construction of the debris collection container can sometimes restrict airflow, potentially reducing suction performance. Furthermore, some systems may experience performance variations when sucking in wet or large debris, which can lead to clogging and operational interruptions requiring manual cleaning. In some configurations, the fan motor control system may not be able to adapt to all load variations, potentially causing motor overspeeding or stalling in certain situations.

[0005] Therefore, it may be necessary to provide a shredding vacuum system that can address challenges related to user ergonomics, debris collection, operational performance, and reliability. Summary of the Invention

[0006] Various aspects and advantages of this disclosure will be set forth in part in the description which follows, or may be obvious from the description, or may be learned by practicing the art.

[0007] According to one embodiment, a debris collection bag includes a fabric body, a buckle, and an auxiliary buckle. The fabric body defines an inlet opening, a cavity for receiving debris therein, and an outlet opening. The fabric body may include a foldable closure extending from the outlet opening and a storage portion extending from the foldable closure, the foldable closure being movable between a folded closed position and an unfolded open position. The buckle may be attached to the fabric body at the foldable closure to selectively hold the foldable closure in the folded closed position. The auxiliary buckle may be attached to the fabric body and selectively connected to the buckle at the foldable closure.

[0008] According to another embodiment, a shredding vacuum cleaner includes an inlet nozzle, a housing, a fan assembly, an outlet nozzle, and a user strap. The housing may define an inlet coupled to the inlet nozzle and an outlet for discharging debris from the housing. The fan assembly may be mounted within the housing and located between the inlet and outlet. The outlet nozzle may be coupled to the outlet. The user strap may include a left shoulder strap, a right shoulder strap, a back panel connected to the left and right shoulder straps at the rear of the user strap, a front connecting panel selectively connected to the left and right shoulder straps at the front of the user strap, and a central anchoring strap extending between the left and right shoulder straps and selectively connected to the housing.

[0009] According to another embodiment, a shredding vacuum cleaner includes an inlet nozzle, a housing, a fan assembly, an outlet nozzle, and a pair of batteries. The housing defines an inlet coupled to the inlet nozzle and an outlet for discharging debris from the housing. The housing may include a main body, a first handle extending radially outward from the main body, and a second handle spaced apart from the first handle and extending radially outward from the main body. The fan assembly may be mounted within the housing and located between the inlet and outlet. The outlet nozzle may be coupled to the outlet. The pair of batteries may be separately supported on the housing. The pair of batteries may include a first battery pack and a second battery pack. The pair of batteries, the fan assembly, and the housing define a center of gravity located between the first and second handles.

[0010] These and other features, aspects, and advantages of this disclosure will become better understood with reference to the following description and the appended claims. The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the technology and, together with the description, serve to explain the principles of the technology. Attached Figure Description

[0011] This application provides a complete and feasible disclosure to those skilled in the art, including the best mode for manufacturing and using the system and method, as set forth in the specification, which references the accompanying drawings, wherein: Figure 1 A perspective view of an operator, user strap, shredding vacuum unit, and debris bag according to embodiments of the present disclosure is provided; Figure 2A perspective view of a shredding vacuum cleaning unit and a debris bag according to an embodiment of the present disclosure is provided; Figure 3 Provided Figure 2 A side perspective view of an exemplary shredding vacuum unit and a debris bag; Figure 4 Provided Figure 2 A top perspective view of an exemplary shredding vacuum unit and a debris bag; Figure 5 A side elevation view of a debris bag for outdoor tools according to an embodiment of the present disclosure is provided; Figure 6 A side elevation view of a debris bag for outdoor tools according to an embodiment of the present disclosure is provided; Figures 7A to 7D Perspective views of various embodiments of a debris bag for outdoor tools according to embodiments of the present disclosure are provided; Figure 8 An elevation view of a user harness for outdoor tools according to an embodiment of the present disclosure is provided; Figure 9 Provided Figure 8 A side perspective view of a portion of an exemplary user harness; Figure 10 Provided Figure 8 Rear perspective view of a portion of an exemplary user harness; Figure 11 A perspective view of a shredding vacuum cleaning unit according to an embodiment of the present disclosure is provided; Figure 12 A perspective view of a shredding vacuum cleaning unit according to an embodiment of the present disclosure is provided; Figure 13 A perspective view of a portion of a shredding vacuum cleaning unit including a handle assembly, according to an embodiment of the present disclosure, is provided; Figure 14 Provided Figure 13 A perspective view of a portion of an exemplary handle component; Figure 15 A perspective view of a portion of the outlet nozzle of a pulverizing vacuum cleaner according to an embodiment of the present disclosure is provided; Figure 16 A perspective view of a portion of a shredding vacuum cleaning unit according to an embodiment of the present disclosure is provided; Figure 17 A perspective view of another portion of a shredding vacuum cleaning unit according to an embodiment of the present disclosure is provided; Figure 18 A perspective view of a portion of a debris bag and a shredding vacuum unit according to an embodiment of the present disclosure is provided, including an enlarged view of the closure assembly; Figure 19 A perspective view of a mixing impeller for a fan assembly for outdoor tools according to an embodiment of the present disclosure is provided; Figure 20 A simplified plan view of the mixing impeller of a fan assembly within the impeller cavity of an outdoor tool according to an embodiment of the present disclosure is provided; Figure 21 A cross-sectional view of a shredding vacuum cleaning unit according to an embodiment of the present disclosure is provided; Figure 22 A side perspective view of a portion of the inlet nozzle of an outdoor tool according to an embodiment of the present disclosure is provided; Figure 23 A side perspective view of a portion of the inlet nozzle of an outdoor tool according to an embodiment of the present disclosure is provided; Figure 24 A cross-sectional view of a portion of the inlet nozzle of an outdoor tool according to an embodiment of the present disclosure is provided; Figure 25 A flowchart illustrating a method of operating a pulverizing vacuum cleaner according to an embodiment of the present disclosure is provided; Figure 26 A flowchart illustrating a method for operating a pulverizing vacuum cleaner according to an embodiment of the present disclosure is provided; and Figure 27 A flowchart illustrating a method for operating a pulverizing vacuum cleaner according to an embodiment of the present disclosure is provided. Detailed Implementation

[0012] Reference will now be made in detail to embodiments of this disclosure, one or more examples of which are illustrated in the accompanying drawings. The term “exemplary” as used herein means “serving as an example, instance, or illustration.” Any implementation described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other implementations. Furthermore, each example is provided as an explanation of the technology and not as a limitation. In fact, it will be apparent to those skilled in the art that modifications and variations can be made to this technology without departing from the scope or spirit of the claimed technology. For example, features shown or described as part of one embodiment may be used with another embodiment to produce yet another embodiment. Therefore, this disclosure is intended to cover such modifications and variations that fall within the scope of the appended claims and their equivalents. Detailed description uses numerals and letter designations to refer to features in the drawings. The same or similar designations in the drawings and description have been used to refer to the same or similar portions of this disclosure.

[0013] As used herein, the terms “first,” “second,” and “third” are used interchangeably to distinguish one component from another and are not intended to indicate the location or importance of individual components. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “the” include plural references. Unless otherwise specified herein, the terms “coupled,” “fixed,” “attached,” etc., refer to both direct coupling, fixing, or attachment, and indirect coupling, fixing, or attachment through one or more intermediate components or features. As used herein, the terms “comprising,” “including,” “containing,” “having,” “covering,” or any other variation thereof are intended to cover non-exclusive inclusion. For example, a process, method, article, or apparatus that includes a list of features is not necessarily limited to those features but may include other features not expressly listed or inherent to such a process, method, article, or apparatus. Furthermore, unless expressly stated to the contrary, “or” refers to inclusive “or” rather than exclusive “or.” For example, condition A or B satisfies any of the following conditions: A is true (or exists) and B is false (or does not exist), A is false (or does not exist) and B is true (or exists), and both A and B are true (or exist).

[0014] For example, approximate terms such as "approximately," "roughly," "approximately," or "substantially" include values ​​up to 10 percent larger or smaller than the given value. When used in the context of angles or directions, such terms include ranges up to 10 degrees larger or smaller than the angle or direction. For example, "substantially vertical" includes directions within 10 degrees of vertical in any direction (e.g., clockwise or counterclockwise).

[0015] Benefits, other advantages, and solutions to problems are described below with reference to specific embodiments. However, benefits, advantages, solutions to problems, and any features that may make any benefit, advantage, or solution occur or become more significant should not be construed as key, necessary, or essential features of any or all claims.

[0016] This document discloses shredding vacuum cleaner tools and related components, such as debris collection containers and user straps, that address certain challenges associated with outdoor powered equipment. The disclosed systems and methods offer specific ergonomic, performance, durability, safety, and operational control characteristics. These configurations can encompass the physical structure of the tool and its accessories, the aerodynamic design of the fan system, and the electronic control logic or controllers that govern the operation of the tool.

[0017] In some aspects, a debris collection container for outdoor tools (e.g., a shredding vacuum cleaner) includes features that enhance durability, ease of use, and airflow. The container may be constructed of a fabric body defining an overall structure including an inlet opening for receiving shredded debris from the tool, a cavity for accumulating and containing collected debris, and an outlet opening for emptying the container. The fabric body may extend along its length, for example, from a front end where the inlet opening is located to a rear end where the outlet opening is located. To facilitate debris emptying, the fabric body may include a foldable closure extending from the outlet opening. This closure may be configured to roll up or fold itself to seal the outlet opening. A storage section may extend from the foldable closure, providing additional material to facilitate a secure closure. The foldable closure is movable between a folded-close position where the outlet opening is sealed and an unfolded open position where debris can be emptied from the container cavity. Notably, aspects of this disclosure can reduce or eliminate the need for zippers, which can easily become clogged by fine dust and debris and can be a point of failure.

[0018] A pocket buckle can be attached to or near the foldable closure (e.g., to secure the foldable closure in its closed position). The pocket buckle can be, for example, a hook and loop, snap, or other suitable fastening mechanism that holds rolled-up or folded material in place. In some configurations, an auxiliary buckle can also be attached to the fabric body (e.g., to engage or secure the pocket buckle). When the container is closed, this auxiliary buckle can be positioned between the outlet opening and the main pocket buckle to help initiate or secure the initial fold. The use of buckles and roll-top closures facilitates one-handed operation to empty the container, improving user convenience.

[0019] The debris collection container may include one or more slatted panels. In one embodiment, the upper slatted panel is attached to the fabric body, for example, by sewing it along the top portion of the container (e.g., along the storage section above the main pocket cavity) into a pocket or sleeve. This upper slatted panel can provide a rigid structure along the top of the container, helping it maintain its shape. Shoulder strap anchors can be attached to the upper slatted panel, providing connection points for hooks or buckles on the user's shoulder strap. Additionally, sidewall slatted panels can be attached to the fabric body, located laterally outside the container cavity and below the upper slatted panel. These slatted panels may be semi-rigid strips, for example, made of durable polymers or plastics. These strips can be configured to provide sufficient rigidity to prevent the container from collapsing even when large forces (e.g., 20 Newtons) are applied. Despite this rigidity, the slatted panels remain sufficiently flexible to allow for user movement and to withstand certain durability tests without breaking or permanently deforming. Notably, the slatted panels can serve as structural support or enhance security (e.g., while generally allowing for container flexibility or folding).

[0020] Additionally or alternatively, the fabric body may define one or more expansion pleats. These expansion pleats can be folds in the fabric that can expand to increase the effective surface area of ​​the container without significantly increasing its overall volume. The pleats can extend from a gathered end to an unfolded end, with the gathered end located near the inlet opening and the unfolded end away from it. By increasing the breathable surface area of ​​the fabric, these pleats can reduce the air resistance of the container, allowing greater airflow out of the container. This can improve the tool's suction performance while minimizing the amount of dust forcefully expelled (e.g., in embodiments where a debris collection container is used as the main air outlet).

[0021] In other aspects, a shredding vacuum tool system may include user straps configured for ergonomic comfort and balanced weight distribution. The user straps may be configured in a backpack style, including a left shoulder strap and a right shoulder strap. A back panel, which may be made of a breathable or padded material, may be attached to the left and right shoulder straps at the rear of the straps. In some designs, the back panel includes an elastic back support element, allowing the straps to conform to the user's body and distribute weight across the shoulders and back. At the front of the straps, a front connection panel may be selectively attached to the left and right shoulder straps, securing the straps to the user. The tool itself may be supported by a central anchoring strap that extends between the left and right shoulder straps and connects to the tool's housing. For example, the front connection panel may include a right buckle on the right shoulder strap and a left buckle on the left shoulder strap, wherein these buckles are configured to selectively connect to each other. The central anchoring strap may be attached to one or both buckles, thereby positioning the tool in a central position directly in front of the user.

[0022] The carrying system can also be configured to support a separate debris container, such as the debris collection container described above or below. The carrying strap may further include side anchoring straps, a rear anchor, and a container anchor. The rear anchor may be located at the rear of the carrying strap, for example, on the back panel between the shoulder straps. The side anchoring strap extends from the rear anchor, along the side of the user's body, and connects to the front connection panel. The container anchor, connected to the debris container to support its weight, may be supported on the side anchoring strap. In some embodiments, the container anchor is slidably disposed on the side anchoring strap, particularly allowing the user to adjust the container's position for comfort or balance as it fills with debris. Some or all of the strap adjustment devices may be located at the front of the carrying strap, particularly allowing the user to make adjustments without removing tools or the carrying strap. The attachment points for tools and bags may be grouped on one side (e.g., the right side) so that the entire assembly can be put on or taken off (e.g., in a manner similar to a jacket) when the carrying strap is unfastened. Optionally, a central anchor mount may be provided on the tool housing (e.g., between the first and second handles) to serve as the connection point for the central anchor strap of the user's harness.

[0023] A shredding vacuum cleaner tool can offer advantageous balance, ergonomics, or safety. The tool may include a housing that houses a fan assembly and defines an inlet and an outlet. An inlet nozzle may be attached to the housing inlet to guide debris into the tool, and an outlet nozzle may be attached to the housing outlet to guide the shredded debris into a collection container. The tool may be powered by one or more batteries, such as multiple or a pair of batteries (including a first battery pack and a second battery pack). The battery packs may be separately supported on the housing. The placement of the batteries, along with the fan assembly and other components, can be arranged to affect the tool's center of gravity. In some embodiments, the center of gravity is located between the tool's first and second handles, and the two battery packs are equidistantly spaced around this center of gravity. In some cases, the center of gravity may be located within a volume defined by the two battery packs and the space between them.

[0024] In some embodiments, a first and second handle may extend radially outward from the body of the housing. These handles can be positioned to balance the weight of the motor and battery, which can contribute to a relatively low moment of inertia. Notably, the tool may feel relatively lighter and easier to manipulate during use (e.g., compared to existing designs). In some embodiments, the handle surrounds or is radially adjacent to the battery pack. The handle can provide a protective shield for the battery, preventing damage from drops or impacts. The handle may be located in front of the battery, closer to the inlet nozzle. Advantageously, the handle can provide suitable balance or allow the user to maintain a comfortable nozzle angle and clear visibility of the workpiece or nozzle tip.

[0025] One or two handles may incorporate contact rods or contact wires. The rods or wires may be supported on the grip of the handle and exposed to contact the operator's hand, particularly to eliminate or mitigate the effects of static electricity. In some embodiments, the conductive wires extend through the top and bottom of each handle, forming multiple contact points to facilitate grounding via the user's hand. These contact points may be positioned where the operator naturally applies pressure, such as the portion of the handle furthest from the user when pushing the tool and the portion closest to the user when pulling the tool.

[0026] The tool may include a fan assembly with a mixed-flow impeller (e.g., incorporating characteristics of both axial and centrifugal fans). The impeller may define an axial height and a radial diameter, with the impeller ratio of axial height to radial diameter being between approximately 0.5 and 1.5, and in some cases between 0.5 and 1.0. This geometry allows the fan assembly to be radially compact (e.g., compared to existing tools). The impeller may be enclosed within an impeller cavity in a housing, and the radial clearance between the impeller and the housing wall may vary. A first, smaller radial clearance value may be defined at the cavity inlet, while a second, larger radial clearance value may be defined at the cavity outlet. For example, the first clearance may be between 4 and 7 mm, and the second clearance may be between 6 and 9 mm. This radial clearance dimension may gradually increase linearly or exponentially along the axial direction from the inlet to the outlet. This variable clearance design can improve pulverizing performance and help reduce clogging, as stuck debris may become trapped on the narrower inlet side, which is easier to clean.

[0027] The impeller defines the outlet flow at an angle between 20 and 80 degrees relative to the fan's axial rotation direction. This angled airflow provides a range of pressures and flow rates, combining some advantages of both axial and centrifugal fans. Notably, consistent tool performance can be maintained under varying loads. To maintain a compact tool size, the impeller can be designed to operate over a high speed range, such as between 5000 and 16000 RPM. The ratio of the impeller's inlet diameter to its outlet diameter can be defined between 0.5 and 0.9 (e.g., between 0.57 and 0.82), the total outlet diameter between 80 and 160 mm, and the axial height between 60 and 140 mm.

[0028] Alternatively, the housing itself can have a volute-less design, where the air inlet and air outlet of the fan section are substantially axial and parallel to each other (e.g., parallelism within + / - 5 degrees). This eliminates the need for a large helical volute, reducing overall volume, lowering system drag, and thus increasing airflow.

[0029] The inlet nozzle or tube can have a secure and easy-to-operate connection mechanism, such as an insert and rotary lock. This connection mechanism can use an axial cam surface to form a seal, preventing debris escape, and a radial locking geometry to provide tactile or audible feedback to the user, confirming that the tube is correctly installed and preventing loosening during use. In some designs, a portion of the fan impeller is exposed when the inlet nozzle is not attached. To address this, the inlet nozzle itself can be reinforced with thicker walls or by covering the exposed portion of the fan when attached. Alternatively, this section of the tube can include a shroud element, such as a durable insert made of metal or composite material, to provide additional strength and security. Locking mechanisms, such as sensors that detect the presence or absence of the tube, can also be included to prevent tool operation if the tube is not properly attached.

[0030] The tool can also integrate control methods for handling operational challenges such as blockages. In some embodiments, the tool implements a method or system for initiating a stall recovery sequence. The tool's controller can be configured to detect a stall event of the drive motor, which may occur when the fan assembly is blocked by debris. For example, a stall event can be detected by monitoring the motor's back EMF current or detecting a sudden drop in the fan assembly's speed. Upon detecting a stall, the system may require the user to perform a specific action to initiate the stall recovery sequence. For example, the user may need to repeatedly perform an action input, such as by releasing and then re-pressing a trigger on the user interface. In response to the detection of a stall and subsequent user input, the controller can initiate the stall recovery sequence. This sequence may include guiding the drive motor to rotate in a second reverse direction opposite to the normal first direction of rotation. The reverse rotation may be continuous or may involve alternating rotation of the motor between the second direction (reverse) and the first direction (forward) to help clear the blockage. The stall recovery sequence may continue until the blockage is cleared, which can be determined by detecting the absence of stall in the motor (e.g., the motor current or speed returning to normal range), or the stall recovery sequence may terminate if the user releases the trigger or provides another disengagement input signal.

[0031] Alternatively or additionally, the pulverizing vacuum cleaner can be operated using a hybrid closed-loop control system that switches between power regulation and speed regulation to affect performance or enhance safety. This system can be managed by a controller that communicates with the user interface and the drive motor. During normal, typical, or default operation, the tool can operate in a power control mode. In this mode, the controller can receive operational input from the user (e.g., typically via a trigger or user interface) to issue an activation signal or set a power target for the drive motor. The power target can be variable, for example, corresponding to the degree to which the trigger is pressed. Alternatively or additionally, the power target can be limited to a maximum value (e.g., 800 watts). The controller can monitor actual power consumption (e.g., calculated based on battery voltage and current) and use a control algorithm (e.g., a bounded PI controller) to adjust the motor's pulse-width modulation (PWM) signal to maintain the output power at or near the power target level.

[0032] When operating in this power control mode, the system can simultaneously monitor the speed of the drive motor. Under certain conditions, such as when the tool is operating under light or no load, existing designs pose a risk of motor overspeed. In certain aspects of this disclosure, the controller can determine whether the detected speed has not reached a predetermined speed threshold, for example, exceeding a maximum value (e.g., 14,000 RPM) over a set continuous time period (e.g., 200 milliseconds). If this threshold is exceeded, the controller can guide the tool to switch to speed control mode. In speed control mode, regardless of user trigger input, the system can adjust the drive motor to maintain it within a specific speed target (e.g., 14,000 RPM) and control it within a certain tolerance (e.g., + / - 5%). Notably, this prevents damage to the drive motor or fan assembly due to excessive speed. Optionally, the system can remain in speed control mode until the physical load on the tool increases again. The controller can continuously monitor power consumption, and if it detects that the power consumption meets a predetermined power condition (e.g., if the power consumption rises to meet or exceed the initial power target value plus a hysteresis value, e.g., 10 watts), it can determine that the tool is once again under sufficient load. In response, the controller can guide the motor back to power control mode, restoring the output power to a state that corresponds to the user's needs.

[0033] Now refer to the attached diagram, Figures 1 to 12 Various views of a shredding vacuum cleaner tool 100 according to exemplary embodiments of the present disclosure are illustrated. As shown in the figures, and as will be described in more detail below, the shredding vacuum cleaner tool 100 may include a tool unit 102, a debris collection container 110, or a shoulder strap 112 for supporting the tool unit 102 or the debris collection container 110.

[0034] A shredder vacuum cleaner tool 100 (e.g., tool unit 102) includes a housing 114. One or more handles 116, 118 extend from the housing 114. A user interface 120 may be further disposed on the housing 114 (e.g., on or near the handles 110, 115) and may provide one or more input elements (e.g., buttons, triggers 122, switches, etc.) for operator engagement to control the tool 100. For example, the user interface 120 may include a trigger 122 disposed in or on a second handle 118, 115. The trigger 122 may be operably (e.g., electrically or wirelessly) in communication with a controller 124 and is generally configured to cause operation of the shredder vacuum cleaner tool 100 when actuated by an operator. For example, the trigger 122 may be configured to activate a drive motor 128 or fan assembly 126 disposed in the housing 114. Figure 20 Optionally, trigger 122 may include a speed selector, allowing the operator to variably control the power of the shredding vacuum cleaner 100 within a preset speed range. For example, it is understood that a potentiometer may be connected to trigger 122 to detect the position or engagement of trigger 122 (e.g., trigger pull).

[0035] In some embodiments, a controller 124 may be provided (e.g., on or within housing 114) operatively (e.g., electrically or wirelessly) communicating with one or more components of the shredder vacuum cleaner 100 (e.g., fan assembly 126, user interface 120, etc.). The controller 124 may include memory and one or more microprocessors, CPUs, etc., such as general-purpose or special-purpose microprocessors, operable to execute programming instructions or microcontroller code associated with the operation of the shredder vacuum cleaner 100. The memory may be random access memory (e.g., DRAM) or read-only memory (e.g., ROM or FLASH). In some embodiments, the processor executes non-transitory programming instructions stored in the memory. For some embodiments, the instructions include software packages configured to operate the shredder vacuum cleaner 100 or perform operating routines (e.g., exemplary methods 500, 600, or 700 described below). The memory may be a processor-independent component or integrated within the processor. Alternatively, the controller 124 may be configured to perform control functions without using a microprocessor (e.g., using a combination of discrete analog or digital logic circuits, such as switches, amplifiers, integrators, comparators, flip-flops, AND gates, etc.), rather than relying on software.

[0036] The controller can be located at various locations within the shredder vacuum cleaner 100. Input / output (“I / O”) signals can be routed between the controller 124 and various operating components of the shredder vacuum cleaner 100. One or more components of the shredder vacuum cleaner 100 can communicate operationally with the controller 124 via one or more conductive signal lines or a shared communication bus (e.g., electrical communication).

[0037] Optionally, one or more sensors may be configured to operatively communicate with controller 124. Specifically, one or more speed sensors 130 may be mounted within housing 114 to (e.g., directly or indirectly) detect the rotational speed of flow impeller 156 or drive motor 128. For example, the impeller rotational speed may be determined directly (e.g., by placing a sensor directly on the impeller or impeller shaft) or indirectly (by detecting the motor rotational speed of drive motor 128). Such speed sensors 130 are generally understood and may include one or more magnetic (e.g., Hall effect) sensors, optical sensors (e.g., optical encoders), inductive / variable magnetoresistive sensors, etc. Additionally or alternatively, controller 124 may include back electromotive force (Back-EMF) detection circuitry to measure the Back-EMF voltage generated during rotation of drive motor 128.

[0038] In an exemplary embodiment, housing 114 defines a battery receiving region 132. One or more battery packs 134, 136 may be removably connected at the battery receiving region 132 to the shredding vacuum cleaner 100 to power the shredding vacuum cleaner 100, and in particular its drive motor 128. The battery receiving region 132 may, for example, provide an electrical connection between the battery and the drive motor 128.

[0039] Typically, the housing 114 of the shredder vacuum cleaner 100 defines an inlet 138 and an outlet 140. The shredder vacuum cleaner 100 may include an inlet nozzle 142 removably coupled to the inlet 138 and an outlet nozzle 144 removably coupled to the outlet 140. During assembly, the shredder vacuum cleaner 100 defines an airflow path from an inlet end 146 to an outlet end 148 opposite to the inlet end 146. For example, the inlet nozzle 142 may define an air inlet at the inlet end 146, and the outlet nozzle 144 may define an exhaust outlet at the outlet end 148, such that the airflow path sequentially flows through the inlet nozzle 142, the housing 114, and the outlet nozzle 144. More specifically, the shredder vacuum cleaner 100 may be configured to collect leaves or other debris through the inlet nozzle 142, the housing 114, and the outlet nozzle 144. For example, the debris may include leaves, grass, or other plant material. Although not shown, the shredding vacuum cleaner 100 may include a debris collection container 110, such as a collection container 110, which is removably coupled to an outlet nozzle 144 for collecting leaves or other debris.

[0040] In some embodiments, the longitudinal axis 150 extends through the pulverizing vacuum cleaner 100. The inlet nozzle 142 extends coaxially (e.g., parallel to) the longitudinal axis 150. As shown, at least a portion of the outlet nozzle 144 may extend in a direction different from that coaxially or parallel to the longitudinal axis 150. For example, at least a portion of the outlet nozzle 144 may extend perpendicular to the longitudinal axis 150. In such an exemplary embodiment, the outlet nozzle 144 may include a curved portion 152 extending along a curved path relative to the longitudinal axis 150. Briefly go to Figure 15 The inner surface of the curved portion 152 may include one or more internal ribs 154 extending within the curved portion. Specifically, the internal ribs 154 may extend along at least a portion of the curved path of the airflow. For example, at least one internal rib 154 may extend along the outer radius of the inner surface of the curved portion (e.g., continuously) (as shown). Optionally, a plurality of internal ribs 154 may be spaced apart from each other (e.g., circumferentially or otherwise parallel). Such internal ribs 154 may form raised ridges or convex structures (IEC) and form a barrier to prevent standardized safety test probes (e.g., IEC probes) from reaching the fan assembly 126 through the outlet nozzle 144.

[0041] Overall return to Figures 1 to 12 Including the flow impeller 156 ( Figure 20 The fan assembly 126 can be housed in the housing 114. The drive motor 128 ( Figure 20A drive motor 128 can be operatively coupled to the fan assembly 126 to cause rotation of the fan assembly 126 during operation. For example, the drive motor 128 can cause rotation of the fan assembly 126 when an operator actuates a user input element (e.g., trigger 122). In at least one exemplary embodiment, the housing 114 defines an impeller cavity 158 that surrounds at least a portion of the fan assembly 126. The impeller cavity 158 is in fluid communication with the inlet nozzle 142 and the outlet nozzle 144 and forms at least a portion of an airflow path. Thus, the fan assembly 126 is located downstream of the inlet nozzle 142 and upstream of the outlet nozzle 144 in the airflow path direction.

[0042] Now, a special shift Figures 5 to 10 The following describes various aspects of the debris collection container 110. Generally, the debris collection container 110 defines a plurality of mutually orthogonal directions. Specifically, the debris collection container 110 defines mutually orthogonal length directions E, height directions H, and width directions W. A fabric body 162 (e.g., formed of a stretched or sewn fabric made of any suitable flexible fabric material, such as nylon) extends along the length direction E between a front end 164 and a rear end 166, along the height direction between a top end 168 and a bottom end 170, and along the width direction W between a first transverse end 172 and a second transverse end 174. Between the defined ends, the fabric body 162 defines at least an inlet opening 176, a cavity 178, and an outlet opening 180. As will be described in more detail below, the debris collection container 110 can therefore be attached to a tool unit 102 such that debris can flow from the tool unit 102 (e.g., at the outlet nozzle 144) and enter the cavity 178 through the inlet opening 176. The debris can then be contained within the bag cavity 178 and discharged from the collection container 110 through the outlet opening 180 (e.g., as instructed by the user to open the bag).

[0043] As described above, the fabric body 162 may define an inlet opening 176 through which leaves or other debris may be received. In some embodiments, the inlet opening 176 is defined at a front end 164 (e.g., opposite to a rear end 166 or an outlet opening 180). The inlet opening 176 may be defined as a generally circular opening to mate with or be received on an outlet nozzle 144. Figure 1 For example, inlet opening 176 may mate with and receive at least a portion of outlet nozzle 144. Inlet opening 176 may be removably coupled to outlet nozzle 144 by threaded or non-threaded engagement, bayonet connection, or non-threaded connector (e.g., one or more pins, fasteners, rotatable rods, latches, zippers, or any combination thereof).

[0044] Briefly go to Figure 18One or more nozzle sensors 182 may be configured to operatively communicate with the fan assembly 126 (e.g., directly or indirectly via the controller 124). The nozzle sensors 182 may be configured to detect whether the debris collection container 110 is in an attached position (e.g., fixed to the outlet nozzle 144) and allow activation of the fan assembly 126 (e.g., at the drive motor 128) when the debris collection container is detected to be in an attached position. Therefore, unless the nozzle sensors 182 receive one or more signals indicating that the debris collection container 110 is in an attached position, the fan assembly 126 may be electronically prevented from activating or rotating.

[0045] In some such embodiments, the nozzle sensor 182 includes an electric field sensor, such as a Hall effect sensor or an RFID reader (e.g., mounted on or near the outlet nozzle 144). The debris collection container 110 or the outlet nozzle 144 may include a detectable tag 184 (e.g., a magnet or RFID tag) that selectively communicates (e.g., magnetic or radio frequency) with the electric field sensor at an attachment location. In some such embodiments, the debris collection container 110 or the outlet nozzle 144 may include a connecting zipper 186 at or along the inlet opening 176 that holds the detectable tag 184 or forms mechanical communication with the detectable tag 184 to align the detectable tag 184 with the nozzle sensor 182 (e.g., when fully closed or zipped). Thus, the nozzle sensor 182 may allow the fan assembly 126 to activate only when both halves of the zipper are closed. Optionally, the connecting zipper 186 includes a top portion joined together to form a snap or other suitable coupling, allowing the detectable element to be aligned or engaged with the outlet nozzle 144 or the housing 114. Thus, when the top of the connecting zipper 186 is stopped in the top portion or fully closed position, the connecting zipper 186 forms a snap that engages with the receiver to position the detectable element relative to the outlet nozzle 144 or the housing 114. Additionally or alternatively, a detectable tag 184 may be mounted on the zipper slider 188 (e.g., moving with it) and aligned with the nozzle sensor 182. Thus, when the container zipper is open, the open container zipper may obstruct the nozzle sensor 182; however, when the container zipper is closed (i.e., in the attached position), the container zipper can be aligned with the nozzle sensor 182, thereby allowing activation of the fan assembly 126.

[0046] Now back Figures 5 to 10In some embodiments, the rigid ring 190 is coupled to the fabric body 162 at the inlet opening 176 to maintain a predetermined shape (e.g., matching or complementing the outlet nozzle 144). In some such embodiments, the rigid ring 190 is embedded within the fabric body 162. However, additional or alternative embodiments may include another coupling, sewn pocket, or adhesive to secure the rigid ring 190 relative to the fabric body 162.

[0047] The cavity 178 may be defined within the collection container 110. Specifically, the cavity 178 may be defined within the storage section 192 of the collection container 110. As shown, this section may be located between the inlet opening 176 and the outlet opening 180. For example, along the length direction E, the storage section 192 may be located between the inlet opening 176 (e.g., at or near the front end 164) and the outlet opening 180 (e.g., at or near the rear end 166).

[0048] At or near the outlet opening 180, the fabric body 162 includes a foldable closure 194. For example, the foldable closure 194 may extend from the outlet opening 180 (e.g., forward). The foldable closure 194 may terminate at the storage portion 192. Typically, the foldable closure 194 provides a section of the fabric body 162 that can selectively fold itself to close or seal the outlet opening 180. Specifically, the foldable closure 194 may be in a folded-closed position (e.g., Figure 7A and Figure 7B (where the outlet opening 180 is blocked and closed by the foldable closure 194) and the unfolded position (e.g., Figure 5 (Where the outlet opening 180 is opened to allow debris to flow out) Note that... Figure 7C and Figure 7D The transition between the unfolded position and the folded / closed position is further illustrated according to an exemplary embodiment.

[0049] In an exemplary embodiment, one or more fasteners 444, 446 may be provided on the fabric body 162 to selectively hold the foldable closure 194 in the folded-closed position. For example, a pocket buckle 196 (e.g., a mechanical clip, elastic ring, latch, snap, half of a hook-and-loop fastener, snap-on button, etc.) may be attached to the fabric body 162 at the foldable closure 194. As shown, the pocket buckle 196 may be spaced apart from the outlet opening 180. When the foldable closure 194 is moved to the folded-closed position, the outlet opening 180 or the rear end 166 of the collection container 110 may move accordingly closer to the pocket buckle 196. Conversely, when the foldable closure 194 is moved to the unfolded position, the outlet opening 180 or the rear end 166 may move further away from the pocket buckle 196.

[0050] In addition to pocket snap 196, some embodiments include an auxiliary snap 198 configured to engage with pocket snap 196 (e.g., forming a male-female snap-fit ​​connection). Thus, the auxiliary snap 198 can be disposed on the fabric body 162 to engage with pocket snap 196 in a mating connection manner. Specifically, the auxiliary snap 198 can be attached to the fabric body 162, selectively engaging with pocket snap 196 at the foldable closure 194. The auxiliary snap 198 can be a complementary connector to pocket snap 196 and can therefore include or be provided as any suitable mechanical clip, resilient ring, latch, snap, half of a hook-and-loop fastener, snap-button, etc. The auxiliary snap 198 can be a male snap relative to the female snap of pocket snap 196 (as shown), or vice versa.

[0051] As shown in the figure, for example in Figure 5 and Figure 7A In this case, the auxiliary buckle 198 may be positioned above the pocket buckle 196 (e.g., along the common portion of length E). However, in alternative embodiments, for example... Figure 7B , Figure 7C and Figure 7D As shown in the figures, the auxiliary buckle 198 is disposed between the outlet opening 180 and the bag buckle 196. In the illustrated embodiment, the auxiliary buckle 198 is disposed along the length direction E between the outlet opening 180 and the bag buckle 196.

[0052] Note that although a single pocket snap 196 and an auxiliary snap 198 are described, it should be understood that multiple pocket snap-auxiliary snap pairs 444-446 can be provided (e.g., as shown in the image). Figure 7B As shown), to hold the collection container 110 at multiple points in the folded closed position.

[0053] As shown in the figure, especially in Figure 5 In this device, one or more slat panels 210 or 212 may be attached to the fabric body 162. Typically, each slat panel 210 or 212 may provide a semi-rigid (e.g., flat) panel or strip. For example, one or more slat panels may be formed of a flexible polymer or plastic. During assembly, each slat panel may be attached to (e.g., secured or embedded) the fabric body 162. For example, slat panels 210 or 212 may be sewn or sealed within a pocket or sleeve of the fabric body 162 (e.g., outside or separate from the pocket cavity 178). In some embodiments, the upper slat panel 210 is attached to the fabric body 162 at the top portion of the container 110. The upper slat panel 210 may be positioned above the pocket cavity 178. Additionally or alternatively, the upper slat panel 210 may be positioned along the storage portion 192. Optionally, a shoulder strap anchor 214 may be attached to the upper slat panel 210 to provide a connection point for hooks or buckles of the user shoulder strap 112.

[0054] Separately from or additionally to the upper slat panel 210, the upper slat panel 212 may be attached to the fabric body 162 (e.g., at a sidewall section of the debris collection container 110). In some embodiments, the upper slat panel 212 is located laterally outside the container cavity. Alternatively, the upper slat panel 212 may be positioned below the upper slat panel 210 (e.g., at a relatively lower height).

[0055] Special steering Figure 6 The fabric body 162 may define one or more expansion pleats 216. Typically, expansion pleats 216 may include or be provided as folded portions in the fabric body 162, and are expandable (e.g., in response to airflow or pressure within the cavity 178) to increase the effective surface area of ​​the debris collection container 110 (e.g., without significantly increasing its overall volume). The one or more expansion pleats 216 may be spaced apart (e.g., along the height direction H). Additionally or alternatively, one or more expansion pleats 216 may extend from the gathered end 218 (e.g., secured, sewn, or adhered to an adjacent portion of the fabric body 162) to the unfolded end 220 (e.g., unsewn or otherwise expandable). Optionally, such expansion pleats 216 may extend substantially along the length direction E, such that the gathered end 218 is positioned close to the inlet opening, while the unfolded end 220 is positioned away from the inlet opening (e.g., close to the outlet opening).

[0056] Now, a special shift Figures 8 to 10 as well as Figure 1 User straps 112 can be provided for an operator to wear and selectively attach to tool unit 102 or debris collection container 110, thereby providing additional support and weight distribution. Typically, user straps 112 can be provided as a "backpack" design, including two shoulder straps 224, 226 (e.g., left shoulder strap 224 and right shoulder strap 226), each extending from behind the operator to the operator's arm or shoulder. Optionally, a back panel 228 (e.g., formed of or including such materials as breathable or padded material) can be coupled to the left shoulder strap 224 and right shoulder strap 226 at the rear of the straps 112, for example, to distribute weight between the shoulder straps 224, 226 or otherwise maintain their relative position at the rear of the straps 112. In some such embodiments, the back panel 228 includes or is provided as a resilient back support element, allowing the back panel 228 to selectively expand and contract (e.g., allowing the back panel 228 to conform to the user's body and distribute weight across the operator's shoulders and back).

[0057] At the front of the shoulder strap 112, a front connecting panel 230 can selectively connect the left shoulder strap 224 and the right shoulder strap 226. For example, the front connecting panel 230 may include a right buckle 234 on the right shoulder strap 226 and a left buckle 232 on the left shoulder strap 224. The right buckle 234 and the left buckle 232 can be provided as any suitable mating pair (e.g., mechanical clips, snaps, ties, etc.). Furthermore, the right buckle 234 and the left buckle 232 can be selectively attached to each other, connecting the front of the left shoulder strap 224 and the right shoulder strap 226.

[0058] In an alternative embodiment, a central anchoring strap 236 is disposed at the front of the user shoulder strap 112 (e.g., on the front connecting panel 230) and selectively connected to the housing 114. For example, the central anchoring strap 236 may extend from one of the right buckle 234 or the left buckle 232 (e.g., from the right buckle 234 or the left buckle 232). During use, the central anchoring strap 236 may be positioned between the left shoulder strap 224 and the right shoulder strap 226. Additionally or alternatively, the central anchoring strap 236 may be provided with clips, ties, or other mechanical anchoring attachments for selective attachment to the housing 114. Optionally, a central anchoring mount 238 may be disposed on the housing 114 of the tool unit 102 (e.g., between the first handle and the second handle 118) as a connection point for the central anchoring strap 236 of the user shoulder strap 112. Thus, the central anchoring strap 236 can be coupled to the tool unit 102 and position the tool unit 102 in a central position directly in front of the user.

[0059] In some embodiments, the user strap 112 is capable of (e.g., selectively) supporting the debris collection container 110. For example, the user strap 112 may include a side anchoring strap 240 on which a container anchor 242 is supported for attachment to the debris container, thereby distributing at least a portion of the weight of the debris collection container 110 to the user strap 112. As shown, the side anchoring strap 240 may extend substantially from the back panel 228 or the rear of the user strap 112. Optionally, a rear anchor 244 may be located at the rear of the user strap 112 and between the left shoulder strap 224 and the right shoulder strap 226, and connected to the side anchoring strap 240. In some embodiments, the side anchoring strap 240 extends between the rear and front of the user strap 112. For example, the side anchoring strap 240 may extend from the rear anchor 244 along the side of the user strap 112 or the operator and connect to the front connection panel 230. In an alternative embodiment, the container anchor 242 is slidably disposed on the side anchoring band 240, which in particular allows the user to adjust the position of the container as it fills with debris to achieve comfort or balance.

[0060] As described above, some or all of the adjustment devices may be located at the front of the shoulder strap 112, in particular allowing the user to make adjustments without removing the tool or the shoulder strap 112. The attachment points of the tool unit 102 and the container 110 may be grouped on one side (e.g., the right side) so that when the shoulder strap 112 is unfastened, the operator can (e.g., in a manner similar to putting on and taking off a jacket) put on or take off the entire shredding vacuum cleaning tool 100.

[0061] Turn now Figure 11 and Figure 12 as well as Figure 16 Various views of the tool unit 102 are shown. As described above, the shredding vacuum cleaner tool 100 can be powered by one or more batteries, such as multiple or a pair of batteries, including a first battery pack 134 and a second battery pack 136 separately supported on the housing 114. When assembled, the tool unit 102 (e.g., including a pair of batteries, a fan assembly 126, and a housing 114) defines a center of gravity 246. As shown, the center of gravity 246 can be located between the first handle 116 and the second handle 118. Optionally, the two battery packs 134, 136 can be equidistantly spaced from the center of gravity 246 (e.g., radially). Furthermore, the center of gravity 246 can be located within a volume defined by the two battery packs 134, 136 and the space between them.

[0062] In some embodiments, the first handle 116 and the second handle 118 may extend radially outward from the body of the housing 114 (e.g., in a direction opposite to the left-right direction of the housing 114). In some embodiments, the handles 116, 118 wrap around or radially abut the battery packs 134, 136. Thus, each battery pack 134, 136 may be radially inward from the first handle 116 and the second handle 118. The handles 116, 118 can effectively provide a protective shield for the battery packs 134, 136 against drop damage or impact. The handles 116, 118 may be located in front of the battery, for example, closer to the inlet nozzle 142. Optionally, a central anchor mount 238 is supported on the housing 114 and located between the first handle 116 and the second handle 118 (e.g., to selectively connect to the central anchor strap 236 of the shoulder strap 112). Advantageously, handles 116, 118 can provide a suitable balance or allow the user to maintain a comfortable nozzle angle and see the workpiece or the tip of the inlet nozzle 142.

[0063] Turn now Figure 13 and Figure 14The first handle 116 and the second handle 118 typically include a grip body 248. In some embodiments, one or both of the first handle and the second handle 118 include a contact wire 250 supported on the respective grip body 248. During assembly, the contact wire 250 may be exposed to contact the operator's hand. For example, an aperture 252 may define a passage through the grip body 248 to expose the contact wire 250, which may be located behind or below the aperture 252. Optionally, the contact wire 250 extends simultaneously from the top and bottom of the respective handle (e.g., from the front and back of the operator's view), forming multiple contact points to facilitate grounding with the operator's hand. In some such embodiments, separate apertures 252 are provided at the top and bottom of the respective handles.

[0064] Turn now Figure 20 and Figure 21 In some embodiments, a fan impeller is provided as or includes a mixing impeller 156 operable to drive airflow through along an axially and radially extending airflow path (e.g., having axial fan characteristics and centrifugal fan characteristics). As shown, the mixing impeller 156 defines an axial height 254 (e.g., between the front end or inlet end 256 and the rear end or outlet end 258) and a radial diameter 260 (e.g., the maximum diameter radially outward from the axial direction A or the axis of rotation of the mixing impeller 156, which may be parallel to the longitudinal axis 150). In some embodiments, the impeller ratio of axial height 254 to radial diameter 260 is between approximately 0.5 and 1.5 (e.g., between 0.5 and 1.5, or between 0.5 and 1.0). At the inlet end 256, the mixing impeller 156 may define an inlet diameter 262, while at the outlet end 258 it defines an outlet diameter 264. The mixing impeller 156 may generally increase in diameter along the axial direction A. Therefore, the exhaust port diameter 264 can be larger than the inlet port diameter 262. For example, the mixing impeller 156 can define the diameter ratio of the inlet port diameter 262 to the exhaust port diameter 264 to be between 0.5 and 0.9 (e.g., between 0.57 and 0.82). Alternatively, the exhaust port diameter 264 can be between 80 and 160 mm. Additionally or alternatively, the axial height 254 can be between 60 and 140 mm.

[0065] It is worth noting that the mixed-flow impeller 156 can be relatively compact (e.g., compared to existing designs) while still generating suitable airflow through the fan assembly 126.

[0066] As shown in the figure, the housing 114 may define an impeller cavity 158 within which a flow impeller 156 is enclosed. Specifically, the impeller cavity 158 may be in fluid communication between an inlet 138 and an outlet 140 (i.e., downstream of the inlet 138 and upstream of the outlet 140). The impeller cavity 158 may include a cavity inlet 266 (e.g., at or upstream of the flow impeller 156) and a cavity outlet 268 (e.g., at or downstream of the flow impeller 156).

[0067] Typically, the radial clearance dimension is defined between the flow impeller 156 and the inner wall of the impeller cavity 158. In some embodiments, the radial clearance dimension varies (e.g., gradually varies along the axial direction A between the cavity inlet 266 and the cavity outlet 268). For example, a first radial clearance value 270 may be defined at the cavity inlet 266, while a second radial clearance value 272 may be defined at the cavity outlet 268, the second radial clearance value 272 being different from the first radial clearance value 270. In some embodiments, the radial clearance increases along the axial direction A (e.g., linearly or exponentially). Therefore, the first radial clearance value 270 may be smaller than the second radial clearance value 272. As an example, the first clearance value may be between 4 and 7 mm, while the second clearance value is between 6 and 9 mm, while remaining larger than the first clearance value. It is worth noting that suitable pulverizing performance can be ensured (e.g., while preventing clogging or allowing easy removal of clogging).

[0068] As shown, the flow impeller 156 can define an outlet flow at an angle of 20 to 80 degrees relative to the axial direction A. It is noteworthy that consistent tool performance can be maintained under varying loads (e.g., operating at a high RPM range, such as between 5000 and 16000 RPM).

[0069] Optionally, such as Figure 21 As shown, housing 114 can have a volute-less design, wherein the cavity inlet 266 and cavity outlet 268 are substantially axial and parallel to each other (e.g., within + / - 5 degrees of parallelism). Notably, this eliminates the need for a large helical volute, reducing overall volume, lowering system drag, and thus increasing airflow.

[0070] Special steering Figures 22 to 24The inlet nozzle 142 can be removably coupled to the inlet 138 of the housing 114 via a bayonet connection (as shown), threaded engagement, unthreaded connector (e.g., one or more pins), fastener, rotatable rod, latch, or any combination thereof. A selective locking interface can be provided at the inlet nozzle 142. For example, the pipe interface 274 formed between the inlet nozzle 142 and the housing 114 may include an axial cam surface or latch 276 for secure connection and to prevent debris escape. Furthermore, a radial locking geometry can convey to the user that the pipe is correctly installed and prevent the pipe from loosening during use.

[0071] In some embodiments, the inlet nozzle 142 selectively covers or defines at least a portion of the impeller cavity 158. Furthermore, when the inlet nozzle 142 is removed from the housing 114, the flow impeller 156 may be at least partially exposed or accessible (e.g., to clear potential blockages). Optionally, when the inlet nozzle 142 is attached to the housing 114, the inlet nozzle 142 may have thicker walls or reinforcements surrounding the region adjacent to (e.g., along axial direction A) the flow impeller 156. Additionally or alternatively, at least a portion of the inlet nozzle 142 (e.g., adjacent to the impeller) may include a shroud insert comprising a separate, relatively high-strength material (e.g., metal or composite material) different from the rest of the inlet nozzle 142.

[0072] Having described the construction of a powered tool (e.g., a pulverizing vacuum cleaner 100) according to exemplary embodiments, exemplary methods for operating the powered tool (e.g., method 500, 600, or 700) will now be described. In exemplary embodiments, the various method steps disclosed herein may be performed by a controller 124 (e.g., all or part of the performance).

[0073] Figures 25 to 27 The steps are described in a specific order for illustrative and discussion purposes. Those skilled in the art will understand that the steps of these methods are non-exclusive and can be modified, adjusted, rearranged, omitted, interchanged, or extended in various ways without departing from the scope of this disclosure, based on the disclosure provided herein.

[0074] Now go to Figure 25In step 510, method 500 includes receiving operational input from a user interface. Typically, such operational input may correspond to or otherwise indicate that an operator has engaged a portion of the user interface and intends to activate a tool, particularly a fan assembly. For example, 510 may include receiving a signal from a trigger in response to an operator squeezing, moving, or otherwise engaging the trigger. Therefore, operational input may include or be provided as a signal from the user interface (e.g., the trigger) in response to its engagement. As mentioned above, the trigger may be a variable input, wherein the signal from the trigger varies depending on the position or degree of its engagement or movement. Thus, operational input can vary depending on the position of the trigger (e.g., trigger pull) or other corresponding input element.

[0075] At 520, method 500 includes rotating a drive motor of the fan assembly (e.g., in a first direction). For example, 520 may be based on or in response to 510. Typically, rotation of the drive motor can cause rotation of the flow impeller of the fan assembly (e.g., according to normal operating parameters) and generate airflow from the inlet nozzle and through the outlet nozzle (e.g., to a debris collection container).

[0076] At 530, method 500 includes detecting a drive motor stall event. Specifically, 530 can occur when the drive motor guiding the fan assembly rotates (e.g., at 520). As an example, 530 may include monitoring the back-EMF current of the drive motor. For example, a spike in the back-EMF detected at the drive motor (e.g., exceeding a predetermined threshold) may correspond to and indicate its stall. As an additional or alternative example, 530 may include monitoring the rotational speed of the fan assembly (e.g., at the flow impeller) in a first direction. For example, a sudden drop (i.e., a decrease) in the fan assembly's rotational speed may correspond to and indicate its stall. As another additional or alternative example, 530 may include receiving stall input at a user interface (e.g., manually indicating a stall). For example, an operator may manually engage a portion of the user interface to provide input or indication of a stall event detected by the operator.

[0077] At 540, method 500 optionally includes confirming the need for a stall recovery action. Therefore, 540 may include receiving a confirmation signal that the user intends the tool to perform a remedial action for the detected stall. In some embodiments, 540 includes detecting a cycle of operational input at the user interface (e.g., after 530). For example, the user may cycle through (e.g., release and re-engage) portions of the same user interface as at 510, such as a trigger. In some embodiments, 540 includes detecting disengagement from the user interface (e.g., the trigger) after 510, 520, or 530. Disengagement from the user interface may prompt the fan assembly to stop rotating (e.g., to stop the power current or command to any drive motor). Subsequently, or after detecting disengagement, 540 may further include detecting re-engagement from the user interface (e.g., within a predetermined time period after 530 or after detecting disengagement from the user interface). Thus, it can be determined that the operator intends to stop the drive motor rotation command before prompting a new action.

[0078] At 550, method 500 includes initiating a stall recovery sequence for the drive motor (e.g., after or based on at least 530). Optionally, 550 may respond to 540 (e.g., detecting a loop in the user interface). In some embodiments, 550 includes aborting rotation in a first direction. In a further embodiment, 550 includes directing the drive motor of the fan assembly to rotate in a second direction opposite to the first direction. For example, if the first direction is counterclockwise about the axial direction, the second direction may be clockwise about the axial direction. In some embodiments, the stall recovery sequence includes causing the drive motor of the fan assembly to rotate alternately between the second and first directions. Thus, the drive motor may pulse or switch its rotation direction when the stall recovery sequence occurs (e.g., while the user interface remains re-engaged) according to a set schedule, rate, or sequence. In an alternative embodiment, the stall recovery sequence includes directing the drive motor of the fan assembly to rotate continuously in the second direction. Thus, the drive motor may rotate only in the second direction (e.g., without aborting) when the stall recovery sequence occurs (e.g., while the user interface remains re-engaged).

[0079] At 560, method 500 includes detecting the termination of stall recovery conditions (e.g., during or after 550). Typically, 560 corresponds to indicating or determining that a stall recovery sequence is no longer needed (e.g., by the operator) or unnecessary (e.g., because the stall event has been resolved). As an example, 560 may include detecting a re-disengagement from the user interface (e.g., after a cycle of detected operational input). Thus, releasing the user interface or trigger after the user has cycled through the user interface (e.g., a trigger) to prompt 550 may indicate a desire to terminate the stall recovery sequence. As an additional or alternative example, 560 may include determining that no stall was detected during the stall recovery sequence. Such a determination may be based, for example, on monitored drive motor current or voltage. Additionally or alternatively, sensor signals (e.g., corresponding to the rotational speed of the drive motor or flow impeller or airflow through the housing) may be received.

[0080] At 570, method 500 includes aborting the stall recovery sequence. Specifically, 570 may occur at least after 550. In some embodiments, 570 responds to detecting renewed disengagement from the user interface. At 570, rotation of the flow impeller or drive motor in the second direction may stop. Subsequently, the drive motor may be allowed to return to typical, default, or normal operation, for example, based on or in response to further engagement with the user interface (e.g., a trigger), allowing the flow impeller or drive motor to rotate in the first direction.

[0081] Now go to Figure 26 In method 600, at 610, the method includes detecting that a trigger of the tool is pulled (or otherwise engaged). For example, 610 may include receiving a signal from the trigger in response to an operator squeezing, moving, or otherwise engaging the trigger. Thus, detection may include or be provided as a signal from the trigger in response to its engagement. As described above, the trigger may be a variable input, wherein the signal from the trigger varies depending on the position or extent of its engagement or movement. Thus, the operational input may vary depending on the position of the trigger (e.g., when the trigger is pulled).

[0082] At 614, method 600 includes rotating a tool (e.g., at a flow impeller or drive motor) counterclockwise in response to 610. Typically, rotation at 614 can cause the flow impeller of the fan assembly to rotate (e.g., according to normal operating parameters) and generate an airflow from the inlet nozzle and through the outlet nozzle (e.g., to a debris collection container).

[0083] At 616, method 600 includes determining whether a stall has occurred (e.g., as a stall event or part of a stall event at the drive motor). Specifically, 616 can occur during 614. As an example, 616 may include monitoring the back-EMF current of the drive motor. For example, a spike in the back-EMF detected at the drive motor (e.g., exceeding a predetermined threshold) may correspond to and indicate its stall. As an additional or alternative example, 616 may include monitoring the counter-clockwise rotational speed of a fan assembly (e.g., at the flow impeller). For example, a sudden drop (i.e., a decrease) in the rotational speed of the fan assembly may correspond to and indicate its stall. As another additional or alternative example, 616 may include receiving stall input at a user interface (e.g., manually indicating a stall). For example, an operator may manually engage a portion of the user interface.

[0084] If it is determined at 616 that no stall has been encountered, then method 600 can return to 614. Conversely, if it is determined at 616 that a stall has been encountered, then method 600 can proceed to 618.

[0085] At 618, method 600 includes stopping the rotation of the flow impeller or drive motor (e.g., immediately following 614 in a counterclockwise direction). Furthermore, 614 can continue until 618 is reached, and counterclockwise rotation is stopped. Similarly, as described below, 626 can continue until 618 is reached.

[0086] At 620, method 600 includes determining whether a trigger cycle has occurred (i.e., whether the trigger has been re-operated within a predetermined time period after 616 or 618). In some embodiments, 620 includes detecting disengagement from the trigger and subsequently detecting re-engagement with the user interface. Thus, it can be determined that the operator intends to stop the drive motor rotation command before prompting a new action.

[0087] If the trigger does not recycle, method 600 can proceed to 622, where the tool enters a low-power or sleep mode, in which the drive motor does not rotate or the tool's motor power consumption is otherwise reduced. Subsequently, method 600 can proceed to 624, where the drive motor can be allowed to return to typical, default, or normal operation, for example, based on or in response to further engagement with the user interface (e.g., the trigger), allowing the flow impeller or drive motor to rotate in a first direction.

[0088] Conversely, if the trigger is re-circulated, method 600 can proceed to 626.

[0089] At 626, method 600 includes rotating a tool (e.g., at a flow impeller or drive motor) clockwise in response to a trigger cycle determined at 620. For example, the drive motor of a fan assembly may be directed to rotate continuously clockwise. The drive motor may rotate only clockwise (e.g., in a pulsed or non-interrupted manner), for example, while the trigger remains re-engaged.

[0090] At 628, method 600 includes re-determining whether a stall has been encountered (e.g., as a stall event at the drive motor or as part of it). Specifically, 628 can occur during 626. As an example, 628 may include monitoring the back-EMF current of the drive motor. For example, a spike in the back-EMF detected at the drive motor (e.g., exceeding a predetermined threshold) may correspond to and indicate its stall. As an additional or alternative example, 628 may include monitoring the clockwise rotational speed of a fan assembly (e.g., at the flow impeller). For example, a sudden drop (i.e., reduction) in the fan assembly's rotational speed or the speed remaining below a set threshold may correspond to and indicate its stall. As another additional or alternative example, 628 may include receiving continuous stall input at a user interface (e.g., manually indicating a stall that has not yet been cleared).

[0091] If a stall is determined to have occurred at 628, method 600 can return to 618. Conversely, if it is determined at 628 that no stall has been encountered, method 600 can proceed to 630, where the flow impeller or drive motor rotates for 100 milliseconds. Subsequently, method 600 can proceed to 624, where the drive motor can be allowed to return to typical, default, or normal operation, for example, based on or in response to further engagement with the user interface (e.g., at a trigger), allowing the flow impeller or drive motor to rotate in a first direction.

[0092] Now go to Figure 27 In method 700, at 710, the method includes receiving operational input from a user interface. Typically, such operational input may correspond to or otherwise indicate that an operator has engaged a portion of the user interface and intends to activate a tool, particularly a fan assembly. For example, 710 may include receiving a signal from a trigger in response to an operator squeezing, moving, or otherwise engaging the trigger. Therefore, operational input may include or be provided as a signal from the user interface (e.g., the trigger) in response to its engagement. As mentioned above, the trigger may be a variable input, wherein the signal from the trigger varies depending on the position or degree of its engagement or movement. Thus, operational input can vary depending on the position of the trigger (e.g., trigger pull) or other corresponding input element.

[0093] At 720, method 700 includes guiding the rotation of a driven motor of the fan assembly (e.g., in a first direction). For example, 720 may be based on or in response to 710. Typically, rotation of the drive motor can cause rotation of the flow impeller of the fan assembly (e.g., according to normal operating parameters) and generate airflow from an inlet nozzle and through an outlet nozzle (e.g., to a debris collection container). Furthermore, in some embodiments, 720 occurs in response to receiving an operational input based on a power target. Therefore, rotation of the drive motor can be driven (e.g., as part of a closed-loop cycle) to achieve or realize a power target. The power target may include or be provided as a predetermined value, function, table, or graph. Furthermore, the power target may be based on 710. If the input at 710 is a variable input, the power target may also vary (e.g., depending on the position or pull of a trigger).

[0094] At 730, method 700 includes detecting the rotational speed of the drive motor (e.g., as described above). In some embodiments, 730 occurs during 720 (e.g., while the drive motor guiding the fan assembly is rotating according to a power target).

[0095] At 740, method 700 includes determining that the rotational speed detected at 730 has not reached a predetermined speed threshold. In some embodiments, the predetermined speed threshold may include or be provided as a predetermined speed threshold. For example, 740 may include determining that the detected rotational speed exceeds the predetermined speed threshold. Optionally, the rotational speed at which the predetermined speed threshold is detected needs to be continuously set (e.g., continuously) for a set time period. Therefore, 740 may include determining that the detected rotational speed exceeds the predetermined speed threshold over a set continuous time period.

[0096] At 750, method 700 includes guiding the drive motor to rotate (e.g., in a first direction). The directional rotation of 750 can be based on a speed target (e.g., in response to 740). Therefore, the power target of 720 can be replaced, superseded, or supplemented by a speed target (e.g., a rotational speed target). Furthermore, the rotation of the drive motor can be driven (e.g., as part of a closed-loop cycle) to achieve or realize the speed target. Optionally, the speed target may include a target speed range. Such a speed range can be set or predetermined within a controller (e.g., as a predetermined value, function, table, or graph). Additionally or alternatively, the speed range may include a minimum speed value as a negative percentage of the speed target and a maximum speed value as a positive percentage of the speed target. Therefore, the speed range can be a + / - fixed percentage of the speed target.

[0097] At 760, method 700 includes detecting the power consumption of the drive motor during the directional rotation at 750. Therefore, 760 can be performed while guiding the drive motor to rotate according to a speed target. Such detection can be performed at a controller or a separate sensor, and is generally understood in accordance with this disclosure.

[0098] At 770, method 700 includes determining that the detected power consumption at 760 meets a predetermined power condition. For example, if the detected power consumption is greater than or equal to a power target at 720 (e.g., precisely or substantially, such as within a set hysteresis range, such as 10 watts).

[0099] At 780, method 700 includes guiding the drive motor to rotate according to a modified target (e.g., after or in response to 770). Optionally, the modified target is a modified power target of the drive motor power output (e.g., the same as or different from the power target at 720). Optionally, the power target may include a target power range. Such a power range may be set or predetermined within a controller (e.g., as a predetermined value, function, table, or graph). Additionally or alternatively, the power range may include a minimum power value as a negative value of a fixed coefficient applied to the power target and a maximum power value as a positive value of a fixed coefficient applied to the power target. Thus, the power range may be a + / - fixed coefficient applied to the power target.

[0100] Further aspects of this disclosure are provided by one or more of the following embodiments: Example 1. A debris collection bag for outdoor tools, the debris collection bag comprising: a fabric body defining an inlet opening, a bag cavity for containing debris therein, and an outlet opening, the fabric body including a foldable closure extending from the outlet opening and a storage portion extending from the foldable closure, the foldable closure being movable between a folded closed position and an unfolded open position; a buckle attached to the fabric body at the foldable closure to selectively hold the foldable closure in the folded closed position; and an auxiliary buckle attached to the fabric body and selectively connected to the buckle at the foldable closure.

[0101] Example 2. A debris collection bag according to any one or more embodiments, wherein the fabric body extends along its length from a front end to a rear end, wherein an inlet opening is provided at the front end, and wherein an outlet opening is defined at the rear end.

[0102] Example 3. A debris collection bag according to any one or more embodiments, wherein an auxiliary buckle is disposed between the outlet opening and the bag buckle.

[0103] Example 4. The debris collection bag according to any one or more embodiments further includes an upper slat panel, which is connected to the fabric body above the bag cavity along the storage section.

[0104] Example 5. The debris collection bag according to any one or more embodiments further includes a shoulder strap anchor, which is connected to the upper slat panel to receive a connecting hook from a user's shoulder strap.

[0105] Example 6. The debris collection bag according to any one or more embodiments further includes a sidewall slat panel, the sidewall slat panel being laterally outside the bag cavity and connected to the fabric body below the upper slat panel.

[0106] Example 7. A debris collection bag according to any one or more embodiments, wherein the fabric body defines one or more expansion pleats extending rearward from a gathered end near the inlet opening to an unfolded end away from the inlet opening.

[0107] Example 8. A shredding vacuum cleaner tool, comprising: an inlet nozzle; a housing defining an inlet coupled to the inlet nozzle and an outlet for discharging debris from the housing; a fan assembly mounted within the housing and located between the inlet and the outlet; an outlet nozzle coupled to the outlet; and a user strap including a left shoulder strap, a right shoulder strap, a back panel connected to the left and right shoulder straps at the rear of the user strap, a front connecting panel selectively connected to the left and right shoulder straps at the front of the user strap, and a central anchoring strap extending between the left and right shoulder straps and selectively connected to the housing.

[0108] Example 9. The shredding vacuum cleaner of claim 8 further includes a debris container, which is selectively attached to an outlet nozzle to receive debris from the outlet nozzle.

[0109] Example 10. The shredding vacuum cleaner of claim 9, wherein the user strap further includes a side anchoring strap extending from the back plate, a rear anchor located at the rear of the user strap and between the left and right shoulder straps, and a container anchor supported on the side anchoring strap and connected to the shredding container for supporting it.

[0110] Example 11. A shredding vacuum cleaner according to any one or more embodiments, wherein the side anchoring strip extends from the rear anchor to the front connecting panel.

[0111] Example 12. A shredding vacuum cleaner according to any one or more embodiments, wherein the container anchor is slidably disposed on a side anchoring band.

[0112] Example 13. A shredding vacuum cleaner according to any one or more embodiments, wherein the front connecting panel includes a right buckle supported on the right shoulder strap and a left buckle selectively connected to the right buckle and supported on the left shoulder strap, wherein side anchors are connected to the right buckle, and wherein a central anchor band is connected to the right buckle.

[0113] Example 14. A shredding vacuum cleaner according to any one or more embodiments, wherein the front connecting panel includes a right buckle supported on the right shoulder strap and a left buckle selectively connected to the right buckle and supported on the left shoulder strap, and wherein a central anchoring strap extends from one of them.

[0114] Example 15. A shredding vacuum cleaner includes: an inlet nozzle; a housing defining an inlet coupled to the inlet nozzle and an outlet for discharging debris from the housing, the housing including a body, a first handle extending radially outward from the body, and a second handle spaced apart from the first handle and extending radially outward from the body; a fan assembly mounted within the housing and located between the inlet and the outlet; an outlet nozzle coupled to the outlet; and a pair of batteries separately supported on the housing, the pair of batteries including a first battery pack and a second battery pack, wherein the pair of batteries, the fan assembly, and the housing define a center of gravity located between the first handle and the second handle.

[0115] Example 16. A shredding vacuum cleaner according to any one or more embodiments, wherein a pair of batteries are equidistant from each other around the center of gravity of the shredding vacuum cleaner.

[0116] Example 17. A shredding vacuum cleaner according to any one or more embodiments, wherein a first handle is radially adjacent to a first battery pack, and wherein a second handle is radially adjacent to a second battery pack.

[0117] Example 18. A shredding vacuum cleaner according to any one or more embodiments, wherein an inlet nozzle extends forward from the housing, and wherein a first handle and a second handle are positioned in front of a pair of batteries.

[0118] Example 19. A shredding vacuum cleaner according to any one or more embodiments, wherein a first handle or a second handle includes a grip and a contact wire supported on the grip and exposed to contact with a user's hand.

[0119] Example 20. A shredding vacuum cleaner according to any one or more embodiments further includes a central anchor mount supported on the housing and located between the first handle and the second handle, for selective connection to the central anchor strap of the shoulder strap.

[0120] Example 21. A shredding vacuum cleaner includes: an inlet nozzle; a housing defining an inlet coupled to the inlet nozzle and an outlet for discharging debris from the housing; an outlet nozzle coupled to an outlet; and a fan assembly mounted within the housing and located between the inlet and the outlet, the fan assembly including a mixing impeller.

[0121] Example 22. A pulverizing vacuum cleaner according to any one or more embodiments, wherein the mixing impeller defines an axial height and a radial diameter, and wherein the mixing impeller further defines an impeller ratio of axial height to radial diameter between 0.5 and 1.5.

[0122] Example 23. A pulverizing vacuum cleaner according to any one or more embodiments, wherein a housing defines an impeller cavity, a mixing impeller is enclosed within the impeller cavity, the impeller cavity extends axially between a cavity inlet and a cavity outlet, wherein a first radial clearance value is defined between the mixing impeller and the housing at the cavity inlet, and wherein a second radial clearance value is defined between the mixing impeller and the housing at the cavity outlet, the second radial clearance value being greater than the first radial clearance value.

[0123] Example 24. A pulverizing vacuum cleaner according to any one or more embodiments, wherein the radial clearance dimension between the mixing impeller and the housing gradually increases from a first radial clearance value along the axial direction.

[0124] Example 25. A shredding vacuum cleaner according to any one or more embodiments, wherein a first radial gap value is between 4 mm and 7 mm, and wherein a second radial gap value is between 6 mm and 9 mm.

[0125] Example 26. A pulverizing vacuum cleaner according to any one or more embodiments, wherein the housing defines an impeller cavity, a mixing impeller is enclosed within the impeller cavity, the impeller cavity extends axially between a cavity inlet and a cavity outlet, and wherein the mixing impeller defines an exhaust flow angle relative to the axial direction between 20 degrees and 80 degrees.

[0126] Example 27. A pulverizing vacuum cleaner according to any one or more embodiments, wherein a mixing impeller extends axially between an air inlet end and an air outlet end, and wherein the mixing impeller defines an air outlet diameter between 80 mm and 160 mm at the air outlet end.

[0127] Example 28. A pulverizing vacuum cleaner according to any one or more embodiments, wherein a mixing impeller extends axially between an air inlet end and an air outlet end, wherein the mixing impeller defines an air inlet diameter at the air inlet end, wherein the mixing impeller defines an air outlet diameter at the air outlet end, wherein the mixing impeller further defines the diameter ratio of the air inlet diameter to the air outlet diameter as being between 0.5 and 0.9.

[0128] Example 29. A pulverizing vacuum cleaner according to any one or more embodiments, wherein a mixing impeller extends axially between an air inlet end and an air outlet end, and wherein the mixing impeller defines an air outlet diameter between 80 mm and 160 mm at the air outlet end.

[0129] Example 30. A pulverizing vacuum cleaner according to any one or more embodiments, wherein the mixing impeller defines an axial height extending axially between the inlet end and the outlet end, the axial height being between 60 mm and 140 mm.

[0130] Example 31. A shredding vacuum cleaner tool, comprising: an inlet nozzle; a housing defining an inlet coupled to the inlet nozzle and an outlet for discharging debris from the housing; an outlet nozzle coupled to an outlet; and a fan assembly mounted within the housing and located between the inlet and the outlet, the fan assembly including a mixing impeller, wherein the mixing impeller defines an axial height and a radial diameter, wherein the mixing impeller further defines an impeller ratio of axial height to radial diameter between 0.5 and 1.5, wherein the housing defines an impeller cavity, the mixing impeller being enclosed within the impeller cavity, the impeller cavity extending axially between a cavity inlet and a cavity outlet, wherein a first radial clearance value is defined between the mixing impeller and the housing at the cavity inlet, and wherein a second radial clearance value is defined between the mixing impeller and the housing at the cavity outlet, the second radial clearance value being greater than the first radial clearance value.

[0131] Example 32. A pulverizing vacuum cleaner according to any one or more embodiments, wherein the radial clearance dimension between the mixing impeller and the housing gradually increases from a first radial clearance value along the axial direction.

[0132] Example 33. A shredding vacuum cleaner according to any one or more embodiments, wherein the first radial gap value is between 4 mm and 7 mm, and wherein the second radial gap value is between 6 mm and 9 mm.

[0133] Example 34. A pulverizing vacuum cleaner according to any one or more embodiments, wherein the housing defines an impeller cavity, a mixing impeller is enclosed within the impeller cavity, the impeller cavity extends axially between a cavity inlet and a cavity outlet, and wherein the mixing impeller defines an exhaust flow angle relative to the axial direction between 20 degrees and 80 degrees.

[0134] Example 35. A pulverizing vacuum cleaner according to any one or more embodiments, wherein a mixing impeller extends axially between an air inlet end and an air outlet end, and wherein the mixing impeller defines an air outlet diameter between 80 mm and 160 mm at the air outlet end.

[0135] Example 36. A pulverizing vacuum cleaner according to any one or more embodiments, wherein a mixing impeller extends axially between an air inlet end and an air outlet end, wherein the mixing impeller defines an air inlet diameter at the air inlet end, wherein the mixing impeller defines an air outlet diameter at the air outlet end, wherein the mixing impeller further defines the diameter ratio of the air inlet diameter to the air outlet diameter as being between 0.5 and 0.9.

[0136] Example 37. A pulverizing vacuum cleaner according to any one or more embodiments, wherein a mixing impeller extends axially between an air inlet end and an air outlet end, and wherein the mixing impeller defines an air outlet diameter between 80 mm and 160 mm at the air outlet end.

[0137] Example 38. A pulverizing vacuum cleaner according to any one or more embodiments, wherein the mixing impeller is defined with an axial height extending axially between the inlet end and the outlet end, the axial height being between 60 mm and 140 mm.

[0138] Example 39. A method of operating a pulverizing vacuum cleaner, comprising: receiving an operation input from a user interface; in response to receiving the operation input, guiding a drive motor of a fan assembly to rotate in a first direction; while guiding the drive motor of the fan assembly to rotate, detecting a stall event of the drive motor; and based on detecting the stall event, initiating a stall recovery sequence of the drive motor, the initiation of the stall recovery sequence including guiding the drive motor of the fan assembly to rotate in a second direction opposite to the first direction.

[0139] Example 40. A method according to any one or more embodiments, wherein detecting a stall event includes monitoring the Back-EMF current of the drive motor.

[0140] Example 41. A method according to any one or more embodiments, wherein detecting a stall event includes monitoring the rotational speed of a fan assembly in a first direction.

[0141] Example 42. The method according to any one or more embodiments further includes detecting a loop of operation input at a user interface, wherein in response to detecting a loop, a stall recovery sequence is initiated.

[0142] Example 43. A method according to any one or more embodiments, wherein the cycle of operation input includes detecting detachment from the user interface after receiving operation input, and detecting re-engagement with the user interface after detecting detachment, wherein the method further includes: detecting re-detachment from the user interface after detecting the cycle of operation input; and aborting the stall recovery sequence in response to detecting re-detachment from the user interface.

[0143] Example 44. The method according to any one or more embodiments further includes: determining that there is no stall during a stall recovery sequence; and aborting the stall recovery sequence in response to determining that there is no stall.

[0144] Example 45. A method according to any one or more embodiments, wherein detecting a stall event includes receiving stall input at a user interface.

[0145] Example 46. A method according to any one or more embodiments, wherein the stall recovery sequence includes causing the drive motor of the fan assembly to rotate alternately between a second direction and a first direction.

[0146] Example 47. A method according to any one or more embodiments, wherein the stall recovery sequence includes guiding the drive motor of the fan assembly to rotate continuously in a second direction.

[0147] Example 48. The method according to any one or more embodiments further includes: determining that there is no stall during a stall recovery sequence; and aborting the stall recovery sequence in response to determining that there is no stall.

[0148] Example 49. A shredding vacuum cleaner tool, comprising: an inlet nozzle; a housing defining an inlet coupled to the inlet nozzle and an outlet for discharging debris from the housing; a user interface mounted to the housing; an outlet nozzle coupled to the outlet; a fan assembly mounted within the housing and located between the inlet and outlet, the fan assembly including an airflow impeller and a drive motor mechanically connected to the airflow impeller; and a controller operatively communicating with the user interface and the drive motor, the controller being configured to control the drive motor based on motor operation, including: receiving an operation input from the user interface; in response to receiving the operation input, guiding the drive motor of the fan assembly to rotate in a first direction; detecting a stall event of the drive motor while guiding the rotation of the drive motor of the fan assembly; and initiating a stall recovery sequence of the drive motor based on the detected stall event, the initiation of the stall recovery sequence including guiding the drive motor of the fan assembly to rotate in a second direction opposite to the first direction.

[0149] Example 50. A shredding vacuum cleaner according to any one or more embodiments, wherein detecting a stall event includes monitoring the Back-EMF current of the drive motor.

[0150] Example 51. A shredding vacuum cleaner according to any one or more embodiments, wherein detecting a stall event includes monitoring the rotational speed of the fan assembly in a first direction.

[0151] Example 52. A shredding vacuum cleaner according to any one or more embodiments, wherein motor operation further includes: detecting a cycle of operation input at a user interface, wherein a stall recovery sequence is initiated in response to detecting the cycle.

[0152] Example 53. A shredding vacuum cleaner according to any one or more embodiments, wherein the cycle of operation input includes detecting disengagement from the user interface after receiving operation input, and detecting re-engagement from the user interface after detecting disengagement, wherein motor operation further includes: detecting re-disengagement from the user interface after detecting the cycle of operation input, and suspending the stall recovery sequence in response to detecting re-disengagement from the user interface.

[0153] Example 54. A shredding vacuum cleaner according to any one or more embodiments, wherein motor operation further includes: determining that there is no stall during a stall recovery sequence; and aborting the stall recovery sequence in response to determining that there is no stall.

[0154] Example 55. A shredding vacuum cleaner according to any one or more embodiments, wherein detecting a stall event includes receiving a stall input at a user interface.

[0155] Example 56. A shredding vacuum cleaner according to any one or more embodiments, wherein the stall recovery sequence includes causing the drive motor of the fan assembly to rotate alternately between a second direction and a first direction.

[0156] Example 57. A shredding vacuum cleaner according to any one or more embodiments, wherein the stall recovery sequence includes guiding the drive motor of the fan assembly to rotate continuously in a second direction.

[0157] Example 58. A shredding vacuum cleaner according to any one or more embodiments, wherein motor operation further includes: determining that there is no stall during a stall recovery sequence; and aborting the stall recovery sequence in response to determining that there is no stall.

[0158] Example 59. A method of operating a pulverizing vacuum cleaner includes: receiving an operation input from a user interface; in response to receiving the operation input, guiding a drive motor of a fan assembly to rotate according to a power target; while guiding the drive motor of the fan assembly to rotate according to the power target, detecting the rotational speed of the drive motor; determining that the detected rotational speed has not reached a predetermined speed threshold; and in response to determining that the detected rotational speed has not reached the predetermined speed threshold, guiding the drive motor to rotate according to a speed target.

[0159] Example 60. A method according to any one or more embodiments, wherein the operational input is a variable input, and wherein the power target includes a variable power target based on the variable input.

[0160] Example 61. A method according to any one or more embodiments, wherein determining that the detected rotational speed has not reached a predetermined speed threshold includes determining that the detected rotational speed exceeds the predetermined speed threshold.

[0161] Example 62. A method according to any one or more embodiments, wherein determining that the detected rotational speed exceeds a predetermined speed threshold includes determining that the detected rotational speed exceeds the predetermined speed threshold over a set continuous time period.

[0162] Example 63. A method according to any one or more embodiments, wherein the speed target includes a target speed range, and wherein a predetermined speed threshold is located within the target speed range.

[0163] Example 64. A method according to any one or more embodiments, wherein the target speed range includes a minimum speed value as a negative percentage of the speed target and a maximum speed value as a positive percentage of the speed target.

[0164] Example 65. The method according to any one or more embodiments further includes: while guiding the drive motor to rotate according to a speed target, detecting the power consumption of the drive motor; determining that the detected power consumption satisfies a predetermined power condition; and in response to determining that the detected power consumption satisfies the predetermined power condition, guiding the drive motor to rotate according to a correction target.

[0165] Example 66. The method according to any one or more embodiments, wherein the correction target is a corrected power target of the power output of the drive motor.

[0166] Example 67. A method according to any one or more embodiments, wherein the modified power target includes a target power range, and wherein the power target is located within the target power range.

[0167] Example 68. A method according to any one or more embodiments, wherein the target power range includes a minimum power value as a negative value of a fixed coefficient applied to the power target and a maximum power value as a positive value of a fixed coefficient applied to the power target.

[0168] Example 69. A shredding vacuum cleaner tool, comprising: an inlet nozzle; a housing defining an inlet coupled to the inlet nozzle and an outlet for discharging debris from the housing; a user interface mounted to the housing; an outlet nozzle coupled to the outlet; a fan assembly mounted within the housing and located between the inlet and outlet, the fan assembly including an airflow impeller and a drive motor mechanically connected to the airflow impeller; and a controller operatively communicating with the user interface and the drive motor, the controller being configured to control the drive motor based on motor operation, including: receiving an operation input from the user interface; directing the drive motor of the fan assembly to rotate according to a power target in response to receiving the operation input; detecting a rotational speed of the drive motor while directing the drive motor of the fan assembly to rotate according to the power target; determining that the detected rotational speed has not reached a predetermined speed threshold; and directing the drive motor to rotate according to a speed target in response to determining that the detected rotational speed has not reached the predetermined speed threshold.

[0169] Example 70. A shredding vacuum cleaner according to any one or more embodiments, wherein the operating input is a variable input, and wherein the power target includes a variable power target based on the variable input.

[0170] Example 71. A shredding vacuum cleaner according to any one or more embodiments, wherein determining that the detected rotational speed has not reached a predetermined speed threshold includes determining that the detected rotational speed has exceeded the predetermined speed threshold.

[0171] Example 72. A shredding vacuum cleaner according to any one or more embodiments, wherein determining that the detected rotational speed exceeds a predetermined speed threshold includes determining that the detected rotational speed exceeds the predetermined speed threshold over a set continuous time period.

[0172] Example 73. A shredding vacuum cleaner according to any one or more embodiments, wherein the speed target includes a target speed range, and wherein a predetermined speed threshold is located within the target speed range.

[0173] Example 74. A shredding vacuum cleaner according to any one or more embodiments, wherein the target speed range includes a minimum speed value as a negative percentage of the speed target and a maximum speed value as a positive percentage of the speed target.

[0174] Example 75. A shredding vacuum cleaner according to any one or more embodiments, wherein the motor operation further includes: detecting the power consumption of the drive motor while guiding the drive motor to rotate according to a speed target, determining that the detected power consumption meets a predetermined power condition, and in response to determining that the detected power consumption meets the predetermined power condition, guiding the drive motor to rotate according to a correction target.

[0175] Example 76. A shredding vacuum cleaner according to any one or more embodiments, wherein the correction target is a corrected power target of the drive motor power output.

[0176] Example 77. A shredding vacuum cleaner according to any one or more embodiments, wherein the corrected power target includes a target power range, and wherein the power target is located within the target power range.

[0177] Example 78. A shredding vacuum cleaner according to any one or more embodiments, wherein the target power range includes a minimum power value as a negative value of a fixed coefficient applied to the power target and a maximum power value as a positive value of a fixed coefficient applied to the power target.

[0178] This written description uses examples to disclose this application, including best practices, and also enables any person skilled in the art to practice this disclosure, including making and using any device or system and performing any combined methods. The patent scope of this disclosure is defined by the claims, but may include other examples that would occur to a person skilled in the art. Such other examples are intended to be within the scope of the claims if they include structural elements that are not indistinguishable from the literal language of the claims, or if they include equivalent structural elements that have minor differences from the literal language of the claims.

Claims

1. A debris collection bag for outdoor tools, the debris collection bag comprising: A fabric body defining an inlet opening, a cavity for receiving debris therein, and an outlet opening, the fabric body including a foldable closure extending from the outlet opening and a storage portion extending from the foldable closure, the foldable closure being movable between a folded closed position and an unfolded open position; A pocket snap, which is attached to the fabric body at the foldable closure to selectively hold the foldable closure in the folded closure position; as well as An auxiliary buckle is attached to the fabric body and selectively connected to the pocket buckle at the foldable closure.

2. The debris collection bag according to claim 1, wherein, The fabric body extends along its length from the front end to the rear end, wherein the inlet opening is located at the front end, and wherein the outlet opening is defined at the rear end.

3. The debris collection bag according to claim 1, wherein, The auxiliary buckle is positioned between the outlet opening and the bag buckle.

4. The debris collection bag according to claim 1 further includes an upper slat panel, the upper slat panel being connected to the fabric body above the bag cavity along the storage section.

5. The debris collection bag of claim 4 further includes a shoulder strap anchor, the shoulder strap anchor being coupled to the upper slat panel to receive a connecting hook from a user's shoulder strap.

6. The debris collection bag according to claim 4 further includes a sidewall slat panel, the sidewall slat panel being laterally outside the bag cavity and connected to the fabric body below the upper slat panel.

7. The debris collection bag according to claim 1, wherein, The fabric body defines one or more extended pleats that extend rearward from a gathered end near the entrance opening to an unfolded end away from the entrance opening.

8. A shredding type vacuum cleaner tool, comprising: Inlet nozzle; A housing that defines an inlet coupled to the inlet nozzle and an outlet for discharging debris from the housing; A fan assembly, wherein the fan assembly is installed within the housing and located between the inlet and the outlet; An outlet nozzle, wherein the outlet nozzle is coupled to the outlet; as well as The user carrying strap includes a left shoulder strap, a right shoulder strap, a back panel connected to the left and right shoulder straps at the rear of the user carrying strap, a front connecting panel selectively connected to the left and right shoulder straps at the front of the user carrying strap, and a central anchoring strap extending between the left and right shoulder straps and selectively connected to the housing.

9. The shredding vacuum cleaner of claim 8 further includes a debris container, the debris container being selectively attached to the outlet nozzle to receive debris from the outlet nozzle.

10. The pulverizing vacuum cleaning tool according to claim 9, wherein, The user strap also includes: Side anchoring strips extending from the back plate, A rear anchor fastener is provided at the rear of the user shoulder strap and located between the left and right shoulder straps, and A container anchor that is supported on the side anchoring band and connected to the debris container for support.

11. The pulverizing vacuum cleaning tool according to claim 10, wherein, The side anchoring band extends from the rear anchor to the front connecting panel.

12. The pulverizing vacuum cleaning tool according to claim 11, wherein, The container anchor can be slidably mounted on the side anchoring band.

13. The pulverizing vacuum cleaner tool according to claim 11, wherein, The front connection panel includes a right buckle supported on the right shoulder strap and a left buckle selectively connected to the right buckle and supported on the left shoulder strap. The side anchor is connected to the right fastener, and The central anchoring band is connected to the right fastener.

14. The pulverizing vacuum cleaner tool according to claim 8, wherein, The front connecting panel includes a right buckle supported on the right shoulder strap and a left buckle selectively connected to the right buckle and supported on the left shoulder strap. The central anchoring band extends from one of them.

15. A shredding type vacuum cleaner tool, comprising: Inlet nozzle; A housing defining an inlet coupled to the inlet nozzle and an outlet for discharging debris from the housing, the housing including a body, a first handle extending radially outward from the body, and a second handle spaced apart from the first handle and extending radially outward from the body; A fan assembly, wherein the fan assembly is installed within the housing and located between the inlet and the outlet; An outlet nozzle, wherein the outlet nozzle is coupled to the outlet; as well as A pair of batteries, separately supported on the housing, the pair of batteries comprising a first battery pack and a second battery pack. The pair of batteries, the fan assembly, and the housing define a center of gravity located between the first handle and the second handle.

16. The pulverizing vacuum cleaner tool according to claim 15, wherein, The pair of batteries are equidistant from each other around the center of gravity of the shredding vacuum cleaner.

17. The pulverizing vacuum cleaner tool according to claim 15, wherein, The first handle is radially adjacent to the first battery pack, and The second handle is radially adjacent to the second battery pack.

18. The pulverizing vacuum cleaner tool according to claim 17, wherein, The inlet nozzle extends forward from the housing, and The first handle and the second handle are positioned in front of the pair of batteries.

19. The pulverizing vacuum cleaner tool according to claim 15, wherein, The first handle or the second handle includes a grip and a contact wire supported on the grip and exposed to contact with the user's hand.

20. The shredding vacuum cleaner of claim 15, further comprising a central anchor mount supported on the housing and located between the first handle and the second handle, for selective connection to the central anchor strap of the shoulder strap.

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