Telescopic pole saw and electric tool

Abstract

The utility model provides a telescopic pole saw and an electric tool. The pole saw includes a housing containing an electric motor, a working element, and a telescopic pole extending between the electric motor and the working element. The working element includes a rod supporting the cutting element, a sprocket driven by the electric motor and engaged with the cutting element to drive the cutting element along the rod, and a working element housing disposed about the sprocket and a portion of the rod. The working element housing includes a side wall and a peripheral wall extending around a perimeter of the side wall. The peripheral wall defines a rod opening through which the rod extends and a plurality of debris discharge ports spaced apart from each other and from the rod opening. The plurality of fragment discharge ports are all provided on the same side of the rod.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is a nonprovisional application claiming priority under 35 USC §119(e) to U.S. Provisional Application No. 63 / 461,819 filed on April 25, 2023 and U.S. Provisional Application No. 63 / 623,869 filed on January 23, 2024, which are incorporated herein by reference in their entireties. Technical Field

[0003] The present disclosure relates generally to outdoor power tools, such as pole saws and telescopic pole saws. Background Art

[0004] Pole tools, such as telescopic pole saws, may expel debris during operation. For example, a pole tool may expel debris during a cutting operation. Often, pole tools expel such debris along the length of the pole tool toward the operator's hands and face, which is dangerous and may cause injury to the operator. Additionally, debris may be expelled toward the cutting element, which may damage the cutting element and degrade the performance of the cutting element.

[0005] Therefore, there is a need in the art for an improved long-handled tool with improved debris ejection. In particular, a long-handled tool that ejects chips or debris away from the operator and away from the cutting element would be advantageous. Utility Model Content

[0006] According to the present disclosure, various aspects and advantages of the present invention will be partially set forth in the following description, or may be apparent from the description, or may be understood through technical practice.

[0007] According to one embodiment, a telescopic pole saw is provided. The telescopic pole saw includes a housing containing an electric motor, a working element, and a telescopic pole extending between the electric motor and the working element. The working element includes a rod supporting a cutting element, a sprocket driven by the electric motor and engaged with the cutting element to drive the cutting element along the rod, and a working element housing disposed around the sprocket and a portion of the rod. The working element housing includes a side wall and a peripheral wall extending around the periphery of the side wall. The peripheral wall defines a rod opening through which the rod extends and a plurality of debris discharge ports spaced apart from each other and from the rod opening. The plurality of debris discharge ports are all disposed on the same side of the rod.

[0008] According to another embodiment, a power tool is provided. The power tool includes a housing containing an electric motor, a working element, and a drive shaft extending between the electric motor and the working element. The working element includes a rod supporting a cutting element, a sprocket driven by the electric motor and engaged with the cutting element to drive the cutting element along the rod, and a working element housing disposed around the sprocket and a portion of the rod. The working element housing includes a side wall and a peripheral wall extending around the periphery of the side wall. The peripheral wall defines a rod opening through which the rod extends. A first distance between the cutting element and an inner surface of the peripheral wall adjacent to the drive shaft is greater than 6 mm, and a second distance between the cutting element and the inner surface of the side wall is greater than 7 mm.

[0009] According to another embodiment, a method for operating a power tool is provided. The method includes providing a long-bar tool; positioning a working element of the long-bar tool in a desired position so that a longitudinal axis extending through the long-bar tool is angled relative to a surface; operating the long-bar tool so that the electric motor drives the rotation of the cutting element; and discharging debris from a plurality of debris discharge ports downwardly and toward the surface during operation. The long-bar tool includes a housing containing an electric motor, a working element, and a telescopic long bar extending between the electric motor and the working element. The working element includes a rod supporting the cutting element, a sprocket driven by the electric motor and engaged with the cutting element to drive the cutting element along the rod, and a working element housing disposed around the sprocket and a portion of the rod. The working element housing includes a side wall and a peripheral wall extending around the periphery of the side wall. The peripheral wall defines a rod opening and a plurality of debris discharge ports, the rod extending through the rod opening, and the plurality of debris discharge ports are spaced apart from each other and from the rod opening. The plurality of debris discharge ports are all disposed on the same side of the rod.

[0010] These and other features, aspects and advantages of the present invention will be 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 present technology and, together with the description, are used to explain the principles of the present technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The specification provides a comprehensive and achievable disclosure of the present invention with reference to the accompanying drawings, which is directed to a person skilled in the art and includes the best mode for making and using the present system and method, in which:

[0012] Figure 1 is a perspective view of a pole saw according to an embodiment of the present disclosure;

[0013] Figure 2A According to an embodiment of the present disclosure, Figure 1 A perspective view of the working element of a pole saw;

[0014] Figure 2BAccording to an embodiment of the present disclosure, Figure 1 A perspective view of the working element of a pole saw;

[0015] Figure 3A According to an embodiment of the present disclosure, Figure 2A-2B a perspective view of one side of a working element housing of a working element;

[0016] Figure 3B According to an embodiment of the present disclosure, Figure 3A A perspective view of the other side of the working element housing;

[0017] Figure 4A According to an embodiment of the present disclosure, Figure 2A-2B A cross-sectional view of a working element;

[0018] Figure 4B According to an embodiment of the present disclosure, Figure 4A Detailed views of the working components;

[0019] Figure 4C According to an embodiment of the present disclosure, Figure 4A Detailed views of the working components;

[0020] Figure 5A According to an embodiment of the present disclosure, along line VV Figure 2A-2B A cross-sectional view of a working element;

[0021] Figure 5B According to an embodiment of the present disclosure, Figure 5A Detailed views of the working components;

[0022] Fig. 6A According to an embodiment of the present disclosure, along line VI-VI Figure 2A-2B A cross-sectional view of a working element;

[0023] Figure 6B According to an embodiment of the present disclosure, Fig. 6A Detailed views of the working components;

[0024] Fig. 7A According to an embodiment of the present disclosure, Figure 2A-2B A side perspective view of a working element housing of a working element;

[0025] Figure 7B According to an embodiment of the present disclosure, Fig. 7A A bottom perspective view of a working element housing;

[0026] Figure 8 is a perspective view of a pole saw according to an embodiment of the present disclosure; and

[0027] Fig. 9According to an embodiment of the present disclosure, operation Figure 1 Flow chart of a method of using a long pole saw. DETAILED DESCRIPTION

[0028] The present invention will now be described in detail with reference to embodiments of the present invention, one or more examples of which are shown in the accompanying drawings. The word "exemplary" is used herein to mean "used as an example, instance or illustration". Any implementation described herein as "exemplary" is not necessarily interpreted as being more preferred or more advantageous than other implementations. In addition, each example is provided by way of explanation rather than limitation of the technology. In fact, it is obvious to those skilled in the art that modifications and changes may be made to the present technology without departing from the scope or spirit of the claimed technology. For example, a feature shown or described as part of one embodiment may be used together with another embodiment to produce yet another embodiment. Therefore, the present disclosure is intended to cover such modifications and changes within the scope of the appended claims and their equivalents. Numerical and letter marks are used in the specific implementation to represent features in the drawings. Similar or similar marks in the drawings and the specification are used to refer to similar or similar parts in the present invention.

[0029] As used herein, the terms "first", "second" and "third" can be used interchangeably to distinguish one component from another, rather than to indicate the position or importance of a single component. The singular expressions "one", "an" and "the" also include plural cases, unless the context clearly dictates otherwise. Terms such as "coupled", "fixed", "connected to" refer to direct coupling, fixing or connection, as well as indirect coupling, fixing, or connection through one or more intermediate components or features, unless otherwise specified in the text. The terms "include", "comprise", "compose", "have" or any other variants thereof herein are intended to cover non-exclusive inclusion. For example, a process, method, article or device including a set of features is not necessarily limited to these features, but may include features that are not explicitly listed or other features inherent to such a process, method, article or device. In addition, unless there is a clear statement to the contrary, "or" is inclusive rather than exclusive. For example, any of the following satisfies conditions A or B: 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).

[0030] Terms indicating approximation, such as "about," "approximately," "approximately," or "substantially," include values ​​within 10% greater or less than the value being described. When used in the context of an angle or direction, these terms include values ​​within 10 degrees greater or less than the angle or direction being described. For example, "approximately perpendicular" includes directions that deviate from perpendicular within 10 degrees in any direction (e.g., clockwise or counterclockwise).

[0031] The benefits, other advantages and solutions to the problems are described below in conjunction with specific embodiments. However, the benefits, advantages, solutions to the problems and any features that may cause any benefit, advantage or solution to occur or become more obvious should not be construed as key, required or essential features of any or all claims.

[0032] Generally speaking, a long-handled tool can discharge debris or fragments away from an operator of the long-handled tool and away from a cutting element of the long-handled tool. For example, the working element of the long-handled tool can discharge debris downward toward a surface (e.g., the ground on which the operator is standing). Discharging debris in this manner can provide greater user satisfaction because it can prevent injury to the operator. In addition, discharging debris downward away from the cutting element can prevent damage to the cutting element and degradation of the performance of the cutting element.

[0033] Now referring to the accompanying drawings, Figure 1 A perspective view of a pole saw 100 is shown in accordance with an embodiment of the present disclosure.

[0034] In at least one example embodiment, the pole saw 100 extends along a longitudinal axis 103 between a first end (e.g., a rear end 134) and a second end (e.g., a front end 135). The pole saw 100 generally includes a working element 102, a housing 104, and a pole 106 extending between and connecting the working element 102 and the housing 104. The housing 104 may be located at the rear end 134 of the pole saw 100, and the working element 102 may be located at the front end 135 opposite the rear end 134 of the pole saw 100.

[0035] In at least one example embodiment, the length of the long rod 106 is adjustable. For example, the long rod 106 can be telescopic, including one or more segments 106A and 106B that can be telescopically moved relative to each other. For example, segment 106A can be an outer long rod and segment 106B can be an inner long rod. In other example embodiments, segment 106B can be an outer long rod and segment 106A can be an inner long rod. The inner long rod can be configured to slide longitudinally between a retracted position and an extended position within the outer long rod. The operator can adjust the distance between the working element 102 and the housing 104 by adjusting the relative position of segments 106A and 106B relative to each other. For example, the operator can move one or more segments 106A and 106B between a retracted position and an extended position. In at least one example embodiment, a lock or clamp 108 can be used to keep segments 106A and 106B in a relatively fixed position relative to each other.

[0036] In at least one example embodiment, the working element 102 of the pole saw 100 is a sawing tool configured to cut material. The sawing tool includes a bar 110 extending from a working element housing 112. A cutting element such as a chain 114 extends in an infinite loop around the bar 110 and is driven to move along the track of the bar 110. When holding the pole saw 100 at the housing 104 and the pole 106, the operator can manipulate the sawing tool into a position near an object (e.g., a branch) and push the chain 114 into the object with the chain 114 moving to cut the object. The operator can repeat this process as needed. An optional shoulder strap or body strap 116 can be coupled to at least a portion of the pole saw 100. For example, the optional shoulder strap or body strap 116 can be coupled to a portion of the pole 106 adjacent to the housing 104. The optional shoulder strap or body strap 116 can be used to reduce fatigue when using the pole saw 100 for a long time.

[0037] In at least one example embodiment, the chain 114 is driven by a motor. For example, the motor may be contained within the housing 104. A drive shaft may extend through the long rod 106 to transfer power from the motor to the chain 114 via a sprocket. In other example embodiments, the motor may be contained within the working element housing 112 and drive the chain 114 via a sprocket.

[0038] In at least one example embodiment, the motor can be an electric motor, such as a direct current (DC) brushless motor. The motor includes an output shaft rotatably pinned to a sprocket, such as by a drive shaft. When the output shaft rotates, the chain 114 is driven within the track of the rod 110. In an example embodiment, the motor receives power from a power source 118. For example, the power source 118 may include one or more batteries.

[0039] In at least one example embodiment, the pole saw 100 includes a receiving area 120 configured to receive a power source 118. For example, the receiving area 120 can be configured to receive one or more batteries, such as at least two batteries, at least three batteries, or even at least four batteries. In at least one example embodiment, the power source 118 can be mounted in the receiving area 120 by a translational movement oriented in the direction indicated by arrow A. In other example embodiments, the power source 118 can be mounted in the receiving area 120 by a translational movement oriented in another direction, a rotational movement, or a translational-rotational movement.

[0040] Figure 2A The embodiment according to the present disclosure is shown Figure 1 1. A perspective view of a working element 102 of a pole saw 100. Figure 2B The embodiment according to the present disclosure is shown Figure 1 1. A perspective view of a working element 102 of a pole saw 100.

[0041] In at least one example embodiment, the pole saw 100 may include a chain cover 200 configured to be disposed around the pole 110 and the chain 114. The chain cover 200 may prevent damage to the pole and the chain 114 when the pole saw 100 is not in use, such as during transportation of the pole saw 100. The chain cover 200 may also prevent damage to other objects and prevent injury to an operator when the pole saw 100 is not in use. Additionally, the chain cover 200 may be removed, such as Figure 2B , so that the pole 110 and chain 114 are exposed prior to operation of the pole saw 100.

[0042] In at least one example embodiment, the pole saw 100 includes a base 205 coupled to the segment 106A of the pole 106 adjacent the front end 135. For example, the base 205 can couple the working element 102 to the pole 106. In addition, the pole 110 can be coupled to the base 205, as will be described below with reference to Figures 4A-4C At least a portion of the working element housing 112 is coupled to the base 205 such that the rod 110 and the chain 114 extend from the base 205 and the working element housing 112, as will also be described below with reference to Figures 4A-4C discussed in more detail.

[0043] In at least one example embodiment, the base 205 includes a support 210 extending from an end of the base 205 adjacent the front end 135. The support 210 can be configured to help stabilize the pole saw 100 during operation. For example, the support 210 can rest on a surface adjacent to an object to be cut (e.g., a tree branch) to help stabilize the pole saw 100 during a cutting operation. Additionally, the support 210 can be configured to hold the pole 110 and chain 114 above a surface, such as the ground, when not in use or during transportation of the pole saw 100.

[0044] Figure 3A According to an embodiment of the present disclosure, Figure 2A-2B FIG. 1 is a perspective view of one side of the working element housing 112 of the working element 102 . Figure 3B According to an embodiment of the present disclosure, Figure 3A FIG. 1 is a perspective view of the other side of the working element housing 112 .

[0045] In at least one example embodiment, the working element housing 112 includes a side wall 300 and a peripheral wall 305 extending around the perimeter of the side wall 300. The peripheral wall 305 defines a rod opening 310 through which at least a portion of the rod 110 and the chain 114 extend out of the working element housing 112. The rod opening 310 is adjacent to the front end 135 of the pole saw 100.

[0046] In at least one example embodiment, the peripheral wall 305 defines a plurality of debris exhaust openings 315. The plurality of debris exhaust openings 315 may be spaced apart from each other and from the rod opening 310. In addition, each of the plurality of debris exhaust openings 315 may be disposed on the same side of the rod 110.

[0047] In at least one example embodiment, the plurality of debris exhaust ports 315 include at least two debris exhaust ports. For example, the peripheral wall 305 of the working element housing 112 may define a first debris exhaust port 325 and a second debris exhaust port 330. The first debris exhaust port 325 may be adjacent to the rod opening 310, and the second debris exhaust port 330 may be adjacent to the long rod 106. For example, the first debris exhaust port 325 and the second debris exhaust port 330 may be defined between portions of the peripheral wall 305, such as between the first wall portion 320 and the second wall portion 323. In such an example embodiment, the first wall portion 320 may be adjacent to the rod opening 310, and the second wall portion 323 may be located between the first debris exhaust port 325 and the second debris exhaust port 330. In addition, the first debris exhaust port 325, the second debris exhaust port 330, the first wall portion 320 and the second wall portion 323 may be located on the same side of the rod 110. In addition, the support member 210 may also be located on the same side of the rod 110 as the first debris discharge port 325, the second debris discharge port 330, the first wall portion 320, and the second wall portion 323, as shown in FIG. Figure 4A and 7A -As shown in 7B.

[0048] In at least one example embodiment, the first debris exhaust port 325 has a first length and the second debris exhaust port 330 has a second length. The second length of the second debris exhaust port 330 may be greater than the first length of the first debris exhaust port 325. Additionally, the first length of the first debris exhaust port 325 and the second length of the second debris exhaust port 330 may be greater than the length of each of the first wall portion 320 and the second wall portion 323. Additionally, the second debris exhaust port 330 may extend at an angle 335 relative to the first debris exhaust port 325.

[0049] Figure 4A The embodiment according to the present disclosure is shown Figure 2A-2B A cross-sectional view of the working element 102. Figure 4B The embodiment according to the present disclosure is shown Figure 4A Detailed view of the working element 102. Figure 4C The embodiment according to the present disclosure is shown Figure 4A Detailed view of the working element 102.

[0050] In at least one example embodiment, the working element 102 includes a sprocket 400. The working element housing 112 is disposed around the sprocket 400 and at least a portion of the chain 114 and the rod 110. The sprocket 400 is configured to be driven by an electric motor and engages with the chain 114. For example, the electric motor rotates the sprocket 400 to drive the chain 114 along the rod 110.

[0051] In at least one example embodiment, the working element 102 includes a distance between the chain 114 and the inner surface 410 of the peripheral wall 305 of the working element housing 112, such as a deflection distance 405. For example, the deflection distance 405 can be located between the chain 114 and the inner surface 410 of the peripheral wall 305 of the working element housing 112 adjacent to the segment 106A of the mast 106. In at least one example embodiment, the deflection distance 405 is greater than about 6 mm.

[0052] In at least one example embodiment, the working element 102 includes a fastener 415 configured to secure the rod 110 to the base 205. The fastener 415 may include a bolt, a screw, or other fastener for securing the rod 110 to the base 205 of the working element 102. The fastener 415 may be adjacent to the rod opening 310.

[0053] In at least one example embodiment, the fastener axis 420 extends vertically through the center of the fastener 415. For example, the fastener axis 420 extends perpendicularly to the longitudinal axis 103 of the long pole 106 extending through the long pole saw 100. The working element 102 includes a segment 425 extending between the fastener axis 420 and the pole opening 310, which will be referred to below. Figures 5A-6B Described in more detail. In some example embodiments, the length of segment 425 may be approximately 14 mm.

[0054] Figure 5A FIG. 4 shows a schematic diagram of a circuit ... Figure 2A-2B A cross-sectional view of the working element 102. Figure 5B The embodiment according to the present disclosure is shown Figure 5A Detailed view of the working element 102.

[0055] In at least one example embodiment, the chain 114 is spaced apart from the inner surface of the side wall 300 of the working element housing 112 within the segment 425 by a first side wall distance 500 (eg, Figure 4C). For example, the first sidewall distance 500 is located between the inner surface of the sidewall 300 and the surface of the chain 114 facing the sidewall 300. In at least one example embodiment, within the segment 425, the first sidewall distance 500 is greater than about 7 mm. More specifically, within the segment 425, the first sidewall distance 500 may be greater than about 8 mm. Furthermore, for greater than or equal to about 70% of the length of the segment 425, the first sidewall distance 500 may be greater than about 8 mm.

[0056] Fig. 6A The embodiment according to the present disclosure is shown. Figure 2A-2B A cross-sectional view of the working element 102 along line VI-VI. Figure 6B According to an embodiment of the present disclosure, Fig. 6A Detailed view of the working element 102.

[0057] In at least one example embodiment, the chain 114 is spaced apart from the inner surface of the side wall 300 of the working element housing 112 within the segment 425 by a second side wall distance 600 (eg, Figure 4C 300 and the chain 114 facing the sidewall 300. The second sidewall distance 600 may be closer to the rod opening 310 than the first sidewall distance 500. In at least one example embodiment, the second sidewall distance 600 is greater than about 7 mm within the segment 425. Additionally, the second sidewall distance 600 may be less than about 8 mm within the segment 425. Furthermore, for less than or equal to about 20% of the length of the segment 425, the second sidewall distance 600 may be less than about 8 mm.

[0058] Fig. 7A The embodiment according to the present disclosure is shown Figure 2A-2B FIG. 1 is a side perspective view of the working element housing 112 of the working element 102 . Figure 7B The embodiment according to the present disclosure is shown Fig. 7A FIG. 1 is a bottom perspective view of the working element housing 112 of the working element 102 .

[0059] In at least one example embodiment, the working element housing 112 includes a guide portion 700 configured to guide debris through the plurality of debris exhaust ports 315. For example, the peripheral wall 305 adjacent the segment 106A and the second debris exhaust port 330 includes the guide portion 700. The guide portion 700 may extend at an angle 705 relative to the longitudinal axis 103 of the pole 106 extending through the pole saw 100. Additionally, the second debris exhaust port 330 may be at least partially defined between the guide portion 340 and the second wall portion 323.

[0060] Figure 8 A perspective view of a pole saw 100 is shown in accordance with an embodiment of the present disclosure.

[0061] In at least one example embodiment, the pole saw 100 can be positioned relative to a surface 800 by an operator (not shown) prior to use. For example, the pole saw 100 can be positioned at an angle 805 relative to the surface 800 and a longitudinal axis 103 extending through the pole saw 100. The surface 800 can include a surface such as the ground on which an operator of the pole saw 100 is positioned. In at least one example embodiment, the angle 805 can be less than or equal to about 90°. In other example embodiments, the angle 805 can be greater than about 90°.

[0062] In at least one example embodiment, an operator of the pole saw 100 positions the working element 102 of the pole saw near an object, such as a tree branch, for cutting. In such a position, when the chain 114 moves, the chain 114 of the pole saw 100 is pushed into the object to cut the object. The first wall portion 320, the second wall portion 323, and the guide portion 700 of the working element housing 112 guide debris from the interior of the working element 102 through the plurality of debris discharge ports 315, such as the first debris discharge port 325 and the second debris discharge port 330. Debris from the object, such as wood chips from the tree branch, is guided downwardly from the plurality of debris discharge ports 315 toward the surface 800, as indicated by arrows 810.

[0063] In at least one example embodiment, the first wall portion 320, the second wall portion 323, and the guide portion 700 of the working element housing 112 prevent debris from being discharged along the longitudinal axis 103. For example, as shown by arrows 810, the debris is directed downward through the plurality of debris discharge ports 315 and away from the operator and the chain 114. Thus, the working element housing 112 of the pole saw 100 can prevent injury to the operator and can prevent damage to the working element 102 and degradation of its performance.

[0064] Fig. 9 The operation according to the embodiment of the present disclosure is shown. Figure 1 Flow chart of a method of using a pole saw 100 .

[0065] In at least one example embodiment, a method 900 of operating a power tool such as a pole saw 100 includes providing a pole tool at 905 , positioning the pole tool at a desired location at 910 , operating the pole tool at 915 , and discharging debris downwardly from the pole tool at 920 .

[0066] In at least one example embodiment, providing a pole tool at 905 includes providing a pole saw 100, such as Figure 1As shown. The pole saw 100 includes a housing 104, a working element 102, and a pole 106 extending between the housing 104 and the working element 102. An electric motor may be disposed in the housing 104 or associated with the working element 102. The working element 102 includes a rod 110 supporting a cutting element, such as a chain 114. The working element 102 also includes a sprocket 400, which is configured to be driven by the electric motor and engages with the chain 114 to drive the chain 114 along the rod 110.

[0067] In addition, the working element 102 includes a working element housing 112 disposed around the sprocket 400 and at least a portion of the rod 110. The working element housing 112 includes a side wall 300 and a peripheral wall 305 extending around the periphery of the side wall 300. The peripheral wall 305 of the working element housing 112 defines a rod opening 310 through which the rod 110 extends. The working element housing 112 also defines a plurality of debris discharge ports 315. Each of the plurality of debris discharge ports 315 is disposed on the same side of the rod 110.

[0068] In at least one example embodiment, positioning the pole tool in the desired position at 910 includes positioning the working element 102 of the pole saw 100 in the desired position such that the longitudinal axis 103 extending through the pole saw 100 is at an angle 805 relative to the surface 800. For example, the angle 805 may be the angle at which an operator positions the pole saw 100 relative to the surface at which the operator is positioned. Additionally, the desired position of the pole saw 100 may be such that the working element 102 is located proximate an object to be cut by the chain 114 of the pole saw 100, such as a tree branch.

[0069] In at least one example embodiment, operating the pole tool at 915 includes operating the pole saw 100 such that the electric motor drives rotation of the chain 114. For example, the electric motor may drive rotation of the sprocket 400, which in turn drives the chain 114 to rotate about the pole 110. The rotation of the chain 114 about the pole 110 allows the object to be cut by the chain 114.

[0070] In at least one example embodiment, discharging debris downwardly from the pole tool at 920 includes discharging debris downwardly from the plurality of debris discharge openings 315 and toward the surface 800 during operation of the pole saw 100. For example, debris within the working element 102 may be directed by the first wall portion 320, the second wall portion 323, and the guide portion 700 of the working element housing 112 through the plurality of debris discharge openings 315 and downwardly toward the surface 800, as shown. Figure 8 As shown by arrow 810 in FIG.

[0071] Other aspects of the present invention are provided by one or more of the following embodiments:

[0072] According to one embodiment, a telescopic pole saw is provided. The telescopic pole saw includes a housing containing an electric motor, a working element, and a telescopic pole extending between the electric motor and the working element. The working element includes a rod supporting a cutting element, a sprocket driven by the electric motor and engaged with the cutting element to drive the cutting element along the rod, and a working element housing disposed around the sprocket and a portion of the rod. The working element housing includes a side wall and a peripheral wall extending around the periphery of the side wall. The peripheral wall defines a rod opening through which the rod extends and a plurality of debris discharge openings spaced apart from each other and from the rod opening. The plurality of debris discharge openings are all disposed on the same side of the rod.

[0073] The telescopic pole saw of any one or more of the embodiments, wherein the plurality of debris discharge openings includes a first debris discharge opening adjacent to the pole opening, and a second debris discharge opening adjacent to the telescopic pole.

[0074] The telescopic pole saw of any one or more of the embodiments, wherein the length of the second debris discharge opening is greater than the length of the first debris discharge opening.

[0075] The telescopic pole saw of any one or more of the embodiments, wherein the second debris discharge opening extends at an angle relative to the first debris discharge opening.

[0076] The telescopic pole saw of any one or more embodiments of the present invention, wherein the peripheral wall includes a first wall portion and a second wall portion located on the same side of the pole as the first and second debris discharge openings, the first wall portion being adjacent to the pole opening and the second wall portion being located between the first and second debris discharge openings.

[0077] The telescopic pole saw of any one or more of the embodiments, wherein a length of each of the first debris discharge opening and the second debris discharge opening is greater than a length of each of the first wall portion and the second wall portion.

[0078] The telescopic pole saw of any one or more embodiments of the present invention, wherein the peripheral wall adjacent to the telescopic pole includes a guide portion opposite the pole opening, the guide portion extending at an angle relative to a longitudinal axis extending through the telescopic pole, and the guide portion is configured to guide debris through the plurality of debris discharge openings.

[0079] The telescopic pole saw of any one or more of the embodiments further comprises a support member extending from the working element adjacent to the pole opening. The support member is positioned on the same side of the pole as the plurality of debris discharge openings.

[0080] The telescopic pole saw of any one or more embodiments of the embodiments, wherein a first distance between the cutting element and an inner surface of a peripheral wall of a working element housing adjacent to the telescopic pole is greater than 6 mm, and a second distance between the cutting element and an inner surface of a side wall of a housing cover of the working element housing is greater than 7 mm.

[0081] According to another embodiment, a power tool is provided. The power tool includes a housing containing an electric motor, a working element, and a drive shaft extending between the electric motor and the working element. The working element includes a rod supporting a cutting element, a sprocket driven by the electric motor and engaged with the cutting element to drive the cutting element along the rod, and a working element housing disposed around the sprocket and a portion of the rod. The working element housing includes a side wall and a peripheral wall extending around the periphery of the side wall. The peripheral wall defines a rod opening through which the rod extends. A first distance between the cutting element and an inner surface of the peripheral wall adjacent to the drive shaft is greater than 6 mm, and a second distance between the cutting element and the inner surface of the side wall is greater than 7 mm.

[0082] The power tool of any one or more embodiments of the embodiment, wherein the working element housing includes a fastener configured to fix the rod to the working element. The fastener is adjacent to the rod opening. The working element housing defines a segment between a fastener axis extending through the center of the fastener and the rod opening. The fastener axis is perpendicular to the longitudinal axis extending through the drive shaft.

[0083] The power tool of any one or more of the embodiments, wherein for greater than or equal to 70% of the segments, the second distance is greater than 8 mm, and for greater than or equal to 20% of the segments, the second distance is less than 8 mm.

[0084] In the power tool of any one or more embodiments of the embodiment, the peripheral wall of the housing cover of the working element housing defines a plurality of debris discharge openings. The plurality of debris discharge openings are all arranged on the same side of the rod and are spaced apart from each other between the rod opening and the drive shaft.

[0085] The power tool of any one or more of the embodiments further comprises a support member extending from the working element adjacent to the rod opening, the support member being positioned on the same side of the rod as the plurality of debris discharge ports.

[0086] The power tool of any one or more of the embodiments, wherein the plurality of debris exhaust ports include a first debris exhaust port adjacent to the rod opening and a second debris exhaust port adjacent to the drive shaft.

[0087] In the power tool of any one or more of the embodiments, a length of the second debris exhaust port is greater than a length of the first debris exhaust port, and the second debris exhaust port extends at an angle relative to the first debris exhaust port.

[0088] In the embodiment of the power tool of any one or more embodiments, the peripheral wall includes a first wall portion and a second wall portion located on the same side of the rod as the first debris discharge port and the second debris discharge port. The first wall portion is adjacent to the rod opening, and the second wall portion is located between the first debris discharge port and the second debris discharge port.

[0089] In the electric tool of any one or more of the embodiments, a length of each of the first debris exhaust port and the second debris exhaust port is greater than a length of each of the first wall portion and the second wall portion.

[0090] In the embodiment of any one or more embodiments of the power tool, the peripheral wall adjacent to the drive shaft includes a guide portion opposite to the rod opening. The guide portion extends at an angle relative to the longitudinal axis extending through the drive shaft, and the guide portion is configured to guide debris through the plurality of debris discharge ports.

[0091] According to another embodiment, a method for operating a power tool is provided. The method includes providing a long-bar tool; positioning a working element of the long-bar tool in a desired position so that a longitudinal axis extending through the long-bar tool is angled relative to a surface; operating the long-bar tool so that the electric motor drives the rotation of the cutting element; and discharging debris from a plurality of debris discharge ports downwardly and toward the surface during operation. The long-bar tool includes a housing containing an electric motor, a working element, and a telescopic long bar extending between the electric motor and the working element. The working element includes a rod supporting the cutting element, a sprocket driven by the electric motor and engaged with the cutting element to drive the cutting element along the rod, and a working element housing disposed around the sprocket and a portion of the rod. The working element housing includes a side wall and a peripheral wall extending around the periphery of the side wall. The peripheral wall defines a rod opening and a plurality of debris discharge ports, the rod extending through the rod opening, and the plurality of debris discharge ports are spaced apart from each other and from the rod opening. The plurality of debris discharge ports are all disposed on the same side of the rod.

[0092] This specification uses examples to disclose the utility model, including the best mode, and enables any technician in the field to practice the utility model, including making and using any device or system and performing any combined method. The patent scope of the utility model is defined by the claims and may include other examples that can be thought of by those skilled in the art. If these other examples include structural elements that are not different from the literal wording of the claims, or include equivalent structural elements that are not substantially different from the literal wording of the claims, the scope of the claims covers these other examples.

Claims

1. A telescopic long pole saw, characterized in that: The telescopic long pole saw comprises: a housing containing an electric motor; Working components, including: a rod supporting the cutting element, a sprocket driven by the electric motor and engaged with the cutting element to drive the cutting element along the rod, A working element housing disposed around the sprocket and a portion of the rod, the working element housing comprising a side wall and a peripheral wall extending around the periphery of the side wall, wherein the peripheral wall defines: a rod opening through which the rod extends, and a plurality of debris ejection openings spaced apart from each other and from the rod opening, wherein the plurality of debris ejection openings are all disposed on the same side of the rod; and A telescopic rod extends between the electric motor and the working element.

2. The telescopic pole saw according to claim 1, characterized in that: The plurality of debris discharge ports include: a first debris discharge port adjacent the stem opening; and A second debris discharge port is adjacent to the telescopic pole.

3. The telescopic pole saw according to claim 2, characterized in that: The length of the second debris discharge port is greater than the length of the first debris discharge port.

4. The telescopic pole saw according to claim 2, characterized in that: The second debris exhaust port extends at an angle relative to the first debris exhaust port.

5. The telescopic pole saw according to claim 2, characterized in that: The peripheral wall includes a first wall portion and a second wall portion located on the same side of the rod as the first and second debris discharge ports; The first wall portion is adjacent to the stem opening; and The second wall portion is located between the first debris discharge opening and the second debris discharge opening.

6. The telescopic pole saw according to claim 5, characterized in that: The length of each of the first debris exhaust port and the second debris exhaust port is greater than the length of each of the first wall portion and the second wall portion.

7. The telescopic pole saw according to claim 1, characterized in that: A peripheral wall adjacent to the telescopic pole includes a guide portion opposite to the pole opening; The guide portion extends at an angle relative to a longitudinal axis extending through the telescopic mast; as well as The guide portion is configured to guide debris through the plurality of debris discharge ports.

8. The telescopic pole saw according to claim 1, characterized in that: The telescopic pole saw also includes a support extending from the working element adjacent the pole opening, wherein the support is positioned on the same side of the pole as the plurality of debris ejection openings.

9. The telescopic pole saw according to claim 1, characterized in that: in: A first distance between the cutting element and an inner surface of a peripheral wall of a housing of a working element adjacent to the telescopic rod is greater than 6 mm; and A second distance between the cutting element and an inner surface of a side wall of the housing cover of the working element housing is greater than 7 mm.

10. An electric tool, characterized in that: The electric tool comprises: A housing including an electric motor; Working elements, including: a rod supporting the cutting element, a sprocket driven by the electric motor and engaged with the cutting element to drive the cutting element along the rod, a working element housing disposed about the sprocket and a portion of the rod, the working element housing including a side wall and a peripheral wall extending around a periphery of the side wall, the peripheral wall defining a rod opening through which the rod extends; and a drive shaft extending between the electric motor and the working element; wherein a first distance between the cutting element and an inner surface of a peripheral wall adjacent to the drive shaft is greater than 6 mm; and Wherein, a second distance between the cutting element and the inner surface of the side wall is greater than 7 mm.

11. The electric tool according to claim 10, characterized in that: The working element housing includes a fastener configured to secure the rod to the working element, the fastener being adjacent the rod opening; and The working element housing defines a segment between a fastener axis extending through a center of the fastener and the stem opening, the fastener axis being perpendicular to a longitudinal axis extending through the drive shaft.

12. The electric tool according to claim 11, characterized in that: For greater than or equal to 70% of said segments, said second distance is greater than 8 mm; and For greater than or equal to 20% of the segments, the second distance is less than 8 mm.

13. The electric tool according to claim 10, characterized in that: A peripheral wall of the housing cover of the working element housing defines a plurality of debris discharge openings, which are all disposed on the same side of the rod and are spaced apart from each other between the rod opening and the drive shaft.

14. The electric tool according to claim 13, characterized in that: The power tool also includes a support extending from the working element adjacent the rod opening, wherein the support is positioned on the same side of the rod as the plurality of debris ejection ports.

15. The electric tool according to claim 13, characterized in that: The plurality of debris discharge ports include: a first debris discharge port adjacent the stem opening; and A second debris discharge port is adjacent to the drive shaft.

16. The electric tool according to claim 15, characterized in that: The length of the second debris discharge port is greater than the length of the first debris discharge port, and The second debris exhaust port extends at an angle relative to the first debris exhaust port.

17. The electric tool according to claim 15, characterized in that: The peripheral wall includes a first wall portion and a second wall portion located on the same side of the rod as the first debris discharge port and the second debris discharge port; The first wall portion is adjacent to the stem opening; and The second wall portion is located between the first debris discharge opening and the second debris discharge opening.

18. The electric tool according to claim 17, characterized in that: The length of each of the first debris exhaust port and the second debris exhaust port is greater than the length of each of the first wall portion and the second wall portion.

19. The electric tool according to claim 13, characterized in that: The peripheral wall adjacent to the drive shaft includes a guide portion opposite to the rod opening; The guide portion extends at an angle relative to a longitudinal axis extending through the drive shaft; and The guide portion is configured to guide debris through the plurality of debris discharge ports.

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