Air compressor with housing-integrated air storage device

Abstract

The invention relates to an air compressor with a housing-integrated air storage device. A power tool compressor is connected to a flexible tubular compressed air storage device. A housing of the compressor includes an integrated spool. The reel is configured to receive and store a ring of a tubular storage device surrounding the reel. The spool rotatably surrounds a central portion of a compressor housing that encloses the compressor pump and the rechargeable battery. A tubular storage device has an interior space extending between opposite ends of the device. The internal space of the tubular storage device has a volume required to store compressed air for driving the power tool. The integrated reel allows a tubular compressed air storage device to be wound thereon for easy use, storage and transportation, resulting in a compact and lightweight compressed air storage solution.

Description

Background Art

[0001] Air compressors are commonly used to power various pneumatic or air-powered tools. Some power tools that can be operated using air compressors include nail guns, impact wrenches, pneumatic ratchets, air hammers, drills, sanders and grinders, spray guns, nail guns, etc. These are just a few examples of power tools that can be operated using air compressors. The advantage of pneumatic tools is that they generally provide high power and durability while being relatively lightweight and easy to handle. However, air compressors may include tanks to pressurize the air and to store the pressurized (e.g., compressed) air. Such compressors typically use large, heavy metal storage tanks. This makes them difficult to move and store. Summary of the Invention

[0002] In some aspects, a power tool compressor is connected to a flexible tubular compressed air storage device rather than a rigid compressed air storage tank. The compressor includes a compressor housing with an integrated spool. The spool is rotatable relative to a central portion of the compressor housing and is configured to receive and store a ring of tubular storage devices wrapped around the spool. The spool surrounds and is rotatable relative to the central portion of the compressor housing, which encloses a compressor pump and a rechargeable battery. The tubular storage device has an interior space that extends between opposite ends of the device and is connected to couplers disposed at opposite ends of the device. The interior space of the tubular storage device has the volume required to store compressed air for driving the power tool. Instead of a rigid, large-diameter storage device, this embodiment uses a long section of flexible tubing with a relatively small diameter to store compressed air. In addition, the integrated spool allows the tubular compressed air storage device to be wound thereon for easy use, storage, and transportation, thereby creating a compact and lightweight compressed air storage solution.

[0003] In some aspects, an air compressor includes a compressor housing and a compressor pump disposed in the compressor housing. The compressor pump has an air inlet and an air outlet. The air compressor includes a motor disposed in the compressor housing. The motor is connected to the compressor pump and is configured to drive the compressor pump. The air compressor includes a pressure regulating device disposed in the compressor housing and an intake valve connected to the air inlet of the compressor pump via a first fluid line. The intake valve is configured to selectively allow airflow from an environment of the compressor to the compressor pump. Additionally, the air compressor includes an exhaust valve connected to the air outlet of the compressor pump via a second fluid line. The exhaust valve is configured to selectively allow airflow from the compressor pump to an air storage device. The compressor housing includes a hollow first cylindrical portion that receives and supports the compressor pump and the pressure regulating device. The first cylindrical portion includes a housing first end, a housing second end opposite the housing first end, and a cylindrical housing sidewall extending between the housing first end and the housing second end. A height dimension of the first cylindrical portion corresponds to a distance between the housing first end and the housing second end. The compressor housing includes a housing first flange disposed between the housing first end and an intermediate height of the first cylindrical portion. The housing first flange protrudes outward from the housing sidewall and extends along a perimeter of the housing sidewall. The compressor housing includes a housing second flange disposed between the housing second end and the intermediate height of the first cylindrical portion. The housing second flange protrudes outward from the housing sidewall and extends along a perimeter of the housing sidewall. Additionally, the compressor housing includes a spool rotatably supported on the compressor housing.

[0004] In some embodiments, the spool includes a hollow second cylindrical portion that surrounds the housing sidewall. The second cylindrical portion includes a spool first end, a spool second end opposite the spool first end, and a cylindrical spool sidewall extending between the spool first end and the spool second end. A height dimension of the second cylindrical portion corresponds to a distance between the spool first end and the spool second end. The spool includes a spool first flange disposed between the spool first end and an intermediate height of the second cylindrical portion. The spool first flange protrudes outward from the spool sidewall and extends along at least a portion of a perimeter of the spool sidewall. The spool includes a spool second flange disposed between the spool second end and the intermediate height of the second cylindrical portion. The spool second flange protrudes outward from the spool sidewall and extends along at least a portion of the perimeter of the spool sidewall. The second cylindrical portion is concentric with the first cylindrical portion, and the spool first flange, the second cylindrical portion, and the spool second flange are disposed between the housing first flange and the housing second flange.

[0005] In some embodiments, the spool second flange includes a through hole that is shaped and sized to receive a tube of the compressed air storage device in a clearance fit.

[0006] In some embodiments, the housing second flange is disposed at the housing second end, the spool sidewall includes a first through opening disposed between the spool second flange and the spool second end, the spool second flange includes a second through opening, and the first through opening and the second through opening are configured to receive a tube of the compressed air storage device in a clearance fit.

[0007] In some embodiments, a human machine interface (HMI) is supported on an outer surface of the housing first end, and a controller is disposed in the compressor housing. The controller is electrically connected to the HMI and is configured to control operation of the compressor pump based on input received from the HMI.

[0008] In some embodiments, the second coupler is a quick connect coupler.

[0009] In some embodiments, the first coupler allows for 360 degree rotation between the exhaust valve and the tube.

[0010] In some embodiments, the air compressor is powered by a rechargeable battery disposed in the compressor housing.

[0011] In some embodiments, the air compressor is powered by a wired connection to a utility power source.

[0012] In some aspects, an air compressor system includes a compressor housing and a compressor pump disposed in the compressor housing. The compressor pump has an air inlet and an air outlet. The air compressor system includes a motor disposed in the compressor housing. The motor is connected to the compressor pump and is configured to drive the compressor pump. The air compressor system includes a pressure regulating device disposed in the compressor housing. The air compressor system includes an intake valve connected to the air inlet of the compressor pump via a first fluid line, the intake valve configured to selectively allow airflow from an environment of the compressor to the compressor pump. The air compressor system includes an exhaust valve connected to the air outlet of the compressor pump via a second fluid line. The exhaust valve is configured to selectively allow airflow from the compressor pump to an air storage device. Additionally, the air compressor system further includes the air storage device. The compressor housing includes a hollow first cylindrical portion that receives and supports the compressor pump and the pressure regulating device. The first cylindrical portion includes a housing first end, a housing second end opposite the housing first end, and a cylindrical housing sidewall extending between the housing first end and the housing second end. A height dimension of the first cylindrical portion corresponds to a distance between the housing first end and the housing second end. The compressor housing includes a housing first flange disposed between the housing first end and an intermediate height of the first cylindrical portion. The housing first flange protrudes outward from the housing sidewall and extends along a perimeter of the housing sidewall. Additionally, the compressor housing includes a housing second flange disposed between the housing second end and the intermediate height of the first cylindrical portion. The housing second flange protrudes outward from the housing sidewall and extends along a perimeter of the housing sidewall. The air outlet valve is supported on the housing second end. The air storage device includes an elongated tube having a device first end that is separably coupled to the air outlet valve via a first coupler and a device second end opposite the device first end. The device second end includes a second coupler. The tube has sufficient flexibility to bend into a loop having a radius that corresponds to a radius of the housing sidewall.

[0013] In some embodiments, an air compressor system includes a spool rotatably supported on a compressor housing. The spool includes a hollow second cylindrical portion that surrounds a side wall of the housing. The second cylindrical portion includes a spool first end, a spool second end opposite the spool first end, and a cylindrical spool side wall extending between the spool first end and the spool second end. A height dimension of the second cylindrical portion corresponds to a distance between the spool first end and the spool second end. The spool includes a spool first flange disposed between the spool first end and an intermediate height of the second cylindrical portion. The spool first flange protrudes outward from the spool side wall and extends along at least a portion of a circumference of the spool side wall. Additionally, the spool includes a spool second flange disposed between the spool second end and the intermediate height of the second cylindrical portion. The spool second flange protrudes outward from the spool side wall and extends along at least a portion of the circumference of the spool side wall. The second cylindrical portion is concentric with the first cylindrical portion, and the spool first flange and the spool second flange are disposed between the housing first flange and the housing second flange.

[0014] In some embodiments, the spool second flange includes a through hole shaped and dimensioned to receive a tube of the compressed air storage device in a clearance fit.

[0015] In some embodiments, the housing second flange is disposed at the housing second end, the spool side wall includes a first through opening disposed between the spool second flange and the spool second end, the spool second flange includes a second through opening, and the first through opening and the second through opening are configured to receive the tube of the compressed air storage device in a clearance fit.

[0016] In some embodiments, an air compressor system includes a human machine interface (HMI) supported on an outer surface of the housing first end and a controller disposed in the compressor housing. The controller is electrically connected to the HMI and is configured to control operation of the compressor pump based on input received from the HMI.

[0017] In some embodiments, the second coupler is a quick connect coupler.

[0018] In some embodiments, the first coupler allows for 360 degree rotation between the exhaust valve and the tube.

[0019] In some embodiments, the air compressor is powered by a rechargeable battery disposed in the compressor housing.

[0020] In some embodiments, the air compressor is powered by a wired connection to a utility power source. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a perspective view of a system for supplying compressed air to a hand-held power tool.

[0022] Figure 2 is a schematic view of the system of Figure 1 , where single lines represent electrical connections and double lines represent fluid connections.

[0023] Figure 3 is a first perspective view of an air compressor of the system.

[0024] Figure 4 is a second perspective view of the air compressor.

[0025] Figure 5 is a cross-sectional view of the air compressor taken along line 5-5 of Figure 1

[0026] Figure 6 is a schematic view of the connection between the air compressor and the compressed air storage device of the system.

[0027] Figure 7 is a cross-sectional view of the tube of the compressed air storage device taken along line 7-7 of Figure 6 DETAILED DESCRIPTION

[0028] With reference to Figure 1 and Figure 2 , the power tool system 15 includes a compressed air driven power tool 100, an air compressor 1, and a compressed air storage device 60. The power tool 100 can be a hand-held tool such as a nail gun, impact wrench, pneumatic ratchet wrench, air hammer, air drill, air sander, air grinder, spray gun, staple gun, or any other air driven power tool. The power tool 100 is directly connected to the air compressor 1 via the compressed air storage device 60. In the illustrated embodiment, the compressed air storage device 60 is an elongated flexible tube 61 configured to store air that has been compressed to a pressure of 50 to 300 pounds per square inch (PSI) or more and to provide a reservoir to steadily supply pressurized air to the power tool 100 during tool operation. The air compressor 1 includes a compressor housing 20 integrated with a spool 40. The tube 61 is sufficiently flexible to allow coiling about the spool 40 whereby the elongated compressed air storage device 60 can be compactly stored and transported with the air compressor 1. The compressed air storage device 60 is capable of use in a fully coiled configuration. Alternatively, the compressed air storage device 60 can be used in a partially or fully uncoiled configuration. The air compressor 1 and the compressed air storage device 60 will now be described in detail.

[0029] With reference to Figures 2-5 ​​The air compressor 1 can be a positive displacement compressor, such as one provided by a reciprocating piston pump, but is not limited to this type of pump. The air compressor 1 includes a compressor housing 20, which is described in detail below. The compressor housing 20 encloses and / or supports other components of the air compressor 1, including the compressor pump 2, the motor 5, the controller 10, the human machine interface (HMI) 11, the battery 12, the pressure regulating device 13, and other ancillary components required for operation of the air compressor 1.

[0030] In the illustrated embodiment, the compressor pump 2 is a reciprocating piston pump, but can be another type of positive displacement pump. The compressor pump 2 uses one or more reciprocating pistons (not shown) to compress air. The compressor pump 2 includes an air inlet 3 and an air outlet 4.

[0031] The air inlet 3 is connected to a compressor intake valve 6 via a first fluid line 7. The intake valve 6 is supported on the compressor housing 20. When the intake valve 6 is in an open position, air in the environment of the compressor 1 (e.g., air at atmospheric pressure) is allowed to enter the first fluid line 7. When the intake valve 6 is in a closed position, air in the environment of the compressor 1 is prevented from entering the first fluid line 7. An air filter 14 can be provided at a location in the first fluid line 7 between the intake valve 6 and the pump air inlet 3.

[0032] The air outlet 4 is connected to a compressor discharge valve 8 via a second fluid line 9. The discharge valve 8 is supported on the compressor housing 20 and includes an integral fluid coupling. When the discharge valve 8 is in an open position, air that has been compressed by the compressor pump 2 is allowed to exit the compressor housing 20. If a compressed air storage device 60 is coupled to the discharge valve fluid coupling, air that has been compressed by the compressor pump 2 is allowed to enter the compressed air storage device 60. When the discharge valve 8 is in a closed position, compressed air is prevented from exiting the compressor housing 20.

[0033] The pressure regulating device 13 is configured to monitor the output pressure of the air compressor 1. In the illustrated embodiment, the pressure regulating device 13 can be a pressure switch that monitors the pressure of the fluid discharged from the compressor pump 2 and outputs a signal to the controller indicative of the detected pressure. For example, the pressure switch can detect the pressure of the second fluid line 9 at a location between the compressor pump 2 and the compressor discharge valve 8.

[0034] The motor 5 is an electric motor. In some embodiments, the motor 5 can be an induction motor, but is not limited to this type of motor. An output shaft (not shown) of the motor 5 is connected to the compressor pump 2, and the motor 5 drives the pump 2 to compress air.

[0035] In the illustrated embodiment, a battery 12 is contained in the compressor housing 20 and supplies power to the controller 10, which in turn supplies power to the motor 5. The battery 12 can be a rechargeable battery, which is charged via a separable wired connection to a utility power source. In some embodiments, the air compressor 1 can omit the battery 12 and obtain power via a direct wired connection to a utility power source. In still other embodiments, the air compressor 1 can include the battery 12 and be capable of being powered by either the battery 12 or a direct connection to a utility power source.

[0036] The controller 10 is communicatively coupled with the HMI 11, the battery 12, and the pressure regulating device 13, and is structured to control the motor 5 based on these inputs. As used herein, the term "communicatively coupled" can refer to a direct wired connection, for example, via conductive signal wires, a shared communication bus, or alternatively can refer to a wireless connection. Thus, the controller 10 can receive information from these devices and selectively activate and operate various operational components.

[0037] In some embodiments, the controller 10 includes one or more memory devices 10a and one or more processors 10b. The processor 10b can be any combination of general or special purpose processors, CPUs, etc., that can execute programmed instructions or control code associated with operation of the air compressor 1. The memory device (i.e., memory) 10a can represent random access memory, such as DRAM, or read only memory, such as ROM or FLASH. In some embodiments, the processor 10b executes programmed instructions stored in the memory 10a. The memory 10a can be a separate component from the processor 10b, or can be contained on board within the processor 10b. Alternatively, the controller 10 can be constructed without using a processor 10b, for example, using a combination of discrete analog or digital logic circuits (such as switches, amplifiers, integrators, comparators, flip-flops, AND gates, etc.) to perform control functions, rather than relying on software.

[0038] In some embodiments, the controller 10 includes a network interface, such that the controller 10 can connect to and communicate over one or more networks (not shown). The controller 10 can also include one or more transmitting, receiving, or transceiving components for transmitting and / or receiving communications with other devices that are communicatively coupled with the air compressor 1. Additionally or alternatively, the transmitting, receiving, or transceiving components can be located off board the controller 10. In general, the controller 10 can be positioned at any suitable location throughout the compressor housing 20.

[0039] The various functions performed by controller 10 can be implemented or supported by one or more computer programs, where each computer program is formed from computer readable program code and embodied in a computer readable medium. The terms "application" and "program" refer to one or more computer programs, software components, sets of instructions, procedures, functions, objects, classes, instances, related data, or portions thereof that can be implemented by suitable computer readable program code. The phrase "computer readable program code" includes any type of computer code, including source code, object code, and executable code. The phrase "computer readable medium" includes any type of medium capable of being accessed by a computer, such as read only memory (ROM), random access memory (RAM), a hard disk drive, a compact disc (CD), a digital video disc (DVD), or any other type of memory. A "non-transitory" computer readable medium excludes wired, wireless, optical, or other communication links. Non-transitory computer readable media include media where data is permanently stored and media where data is stored and later overwritten, such as a rewritable optical disc or an erasable memory device.

[0040] Compressor housing 20 includes a housing center portion 20a configured to house and / or support components of air compressor 1. Compressor housing 20 also includes a housing perimeter portion 20b disposed radially outward relative to housing center portion 20a and supporting spool 40.

[0041] Center portion 20a of compressor housing 20 includes a hollow first cylindrical portion 21 that receives and supports compressor pump 2, motor 5, air filter 14, pressure regulating device 13, HMI 11, controller 10, intake valve 6, and discharge valve 8, as well as any ancillary components required for compressor operation. First cylindrical portion 21 includes a housing first end 22, a housing second end 23 opposite housing first end 22, and a cylindrical housing sidewall 24 extending axially between housing first end 22 and housing second end 23. Housing sidewall 24 has a uniform diameter between housing first end 22 and housing second end 23. A height dimension H1 of first cylindrical portion 21 corresponds to the distance between housing first end 22 and housing second end 23.

[0042] The HMI 11 is mounted on the housing first end 22 and can include switches or other input devices and / or a display. The HMI 11 is configured to allow a user to operate the air compressor 1 and receive information about the air compressor performance. In some embodiments, the display can be color, non-color (e.g., grayscale), or a combination of both. The display can be implemented as any type of display, including a liquid crystal display (LCD), light emitting diode (LED), organic light emitting diode (OLED), or any other alternative configuration known to those of ordinary skill in the art. The display can provide touch screen functionality, and an air pressure level selector can be integrated into the HMI 11.

[0043] The exhaust valve 8 terminates at a hose coupler 28 that projects from the compressor housing 20 adjacent the housing second end 23. The hose coupler 28 is configured to provide a fluid-tight mechanical connection with the first coupler 64 of the air storage device 60. Additionally, in some embodiments, the hose coupler 28 can include a 360 degree bi-directional rotational function, enabling the air storage device 60 to be rotated relative to the compressor.

[0044] The peripheral portion 20b of the compressor housing 20 includes a housing first flange 25 and a housing second flange 27. The housing first flange 25 is disposed between the housing first end 22 and the mid-height 26 of the first cylindrical portion 21. The housing first flange 25 is a rigid annular structure that projects outwardly from the housing sidewall 24 and extends along the perimeter of the housing sidewall 24. The housing second flange 27 is disposed between the mid-height 26 of the first cylindrical portion 21 and the housing second end 23. In the illustrated embodiment, the housing first flange 25 and the housing second flange 27 completely encircle the housing sidewall 24. In other embodiments, the housing first flange 25 and the housing second flange 27 partially encircle the housing sidewall 24.

[0045] In the illustrated embodiment, the housing first flange 25 is disposed below but proximate to the housing first end 22, while the housing second flange 27 is disposed at the housing second end 23.

[0046] The radial dimension R of the housing first flange 25 and the housing second flange 27 is less than the height H1 of the first cylindrical portion 21. hf For example, the first cylindrical portion height H1 is at least four times the radial dimension R of the housing first flange 25 and the housing second flange 27. hf

[0047] ​The spool 40 is rotatably supported on the compressor housing 20. Like the compressor housing 20, the spool 40 includes a spool center portion 40a that surrounds the housing center portion 20a. The spool 40 also includes a spool peripheral portion 40b that is disposed radially outward of the spool center portion 40a and between the housing first flange 25 and the housing second flange 27 in the axial direction of the compressor housing 20.

[0048] The spool center portion 40a includes a hollow second cylindrical portion 41 that surrounds the housing sidewall 24 in a sliding fit. The second cylindrical portion 41 is concentric with the first cylindrical portion 21. The second cylindrical portion 41 includes a spool first end 42, a spool second end 43 opposite the spool first end 42, and a cylindrical spool sidewall 44 extending between the spool first end 42 and the spool second end 43. The spool sidewall 44 is concentric with the housing sidewall 24. The spool sidewall 44 has a non-uniform diameter between the spool first end 42 and the spool second end 43. In particular, the spool second end 43 has a larger diameter than the spool first end 42. The height dimension H2 of the second cylindrical portion 41 corresponds to the distance between the spool first end 42 and the spool second end 43. The transition between the diameters occurs at a location between the mid-height 46 of the second cylindrical portion 41 and the spool second end 43. The height H2 of the second cylindrical portion 41 is greater than the height H1 of the first cylindrical portion.

[0049] The peripheral portion 40b of the spool 40 includes a spool first flange 45 and a spool second flange 47. The spool first flange 45 is disposed between the spool first end 42 and the mid-height 46 of the second cylindrical portion 41. The spool first flange 25 is a rigid annular structure that projects outward from the spool sidewall 44 and extends along the circumference of the spool sidewall 44. The spool second flange 47 is disposed between the mid-height 46 of the second cylindrical portion 41 and the spool second end 43. In the illustrated embodiment, the spool first flange 45 and the spool second flange 47 completely encircle the spool sidewall 44. In other embodiments, the spool first flange 45 and the spool second flange 47 partially encircle the spool sidewall 44.

[0050] In the illustrated embodiment, the reel first flange 45 is disposed at the reel first end 42, while the reel second flange 47 is spaced apart from the reel second end 43. In particular, the reel second flange 47 is disposed at a transition between diameters of the second cylindrical portion 41. In the illustrated embodiment, the transition and the reel second flange 47 are closer to the reel second end 43 than the second cylindrical portion mid-height 46. This configuration provides an annular toe 49 that elevates the reel second flange 47 relative to a support surface (e.g., a table or floor). The toe 49 provides sufficient clearance to accommodate and encircle the protruding hose coupler 28. Additionally, the toe 49 provides clearance to allow the tube 61 forming the air storage device 60 to pass between the reel second flange 47 and the support surface. To this end, the reel sidewall 44 includes a radially extending through-hole or slot 52 that allows the tube 61 to pass therethrough.

[0051] The reel 40, including the reel first flange 45, the second cylindrical portion 41, and the reel second flange 47, is disposed between the housing first flange 25 and the housing second flange 27. The outer surface of the first cylindrical portion 21 serves as a bearing surface, and the reel 40 rotates relative to the first cylindrical portion 21 about the axis of rotation 50. Directions mentioned herein, such as axial and radial, are relative to the axis of rotation 50. Rotation of the reel 40 relative to the first cylindrical portion 21 facilitates winding of the air storage device onto the compressor housing 20.

[0052] The radial dimension R of the reel first flange 45 and the reel second flange 47 sf may be approximately the same as the height H2 of the second cylindrical portion 41. For example, the second cylindrical portion height H2may be in the range of 0.5 to 1.5 times the radial dimension R of the reel first flange 45 and the reel second flange 47. sf

[0053] The reel second flange 47 includes an axially extending through-hole 48 that is shaped and dimensioned to receive the tube 61 in a clearance fit.

[0054] Referring to Figure 2 and Figures 5-7 , the air storage device 60 is an elongated tube 61 having a device first end 62 that is detachably coupled to the hose coupler 28 of the air exhaust valve 8 via a device first coupler 64, and a device second end 63 opposite the device first end 62. The device second end 62 includes a device second coupler 65. The device first coupler 64 is configured to detachably connect to the hose coupler 28 of the air compressor 1 in a fluid-tight manner, for example using a quick-connect type connector. Similarly, the device second coupler 65 is configured to detachably connect to the tool coupler 102 in a fluid-tight manner, for example using a quick-connect type connector.

[0055] ​The tube 61 is elongated. In particular, the tube diameter d is much smaller than the length (not shown) of the tube 61, where the length of the tube corresponds to the distance between the tube first end 62 and the tube second end 63. The tube length is at least 10 times the diameter d of the tube 61. In some embodiments, the tube length is greater than 50 times the diameter d of the tube 61. The tube 61 is flexible enough to bend into a loop having a radius r1 that is less than or equal to the radius r2 of the housing sidewall 24. The size and capacity of the tube 61 can depend on factors such as the output capacity of the air compressor 1, the air pressure required, and the air demand of the particular application (e.g., the pressure required by the power tool 100). In some embodiments, the air storage device 60 has sufficient capacity to handle the required tool operating pressure and provide sufficient storage capacity to meet the needs of the compressed air system. Increasing the internal volume of the tube by providing a tube 61 of increased length is one way to achieve this. The tube 61 has an internal volume that is sufficient to power a pneumatic power tool, which can require eight liters or more of storage capacity to maintain a high air flow application. However, most pneumatic tools are capable of operating at lower capacities. For example, a nail gun can operate using one liter or less of capacity, depending on the particular tool, the compressor used, and the required recharging period. Providing the tube 61 in a coiled configuration allows for the use of a very long tube 61 while providing a compact air storage configuration.

[0056] The tube 61 is constructed using multiple layers of material to ensure durability, flexibility, and high pressure air resistance Figure 7 ). In the illustrated embodiment, the tube 61 includes an inner tube 66, at least one reinforcement layer 68, and an outer tube 69. The innermost layer of the tube 61 is the inner tube 66, which is responsible for carrying the compressed air. The inner tube 66 can be made of synthetic rubber or a similar material that is capable of withstanding high pressure air and resisting degradation caused by oil or moisture. The reinforcement layers 68 surround the inner tube 66 and provide strength and stability to the tube 61. In the illustrated embodiment, there are four reinforcement layers 68. Each reinforcement layer is typically made of woven or spiral synthetic fiber, such as polyester or nylon. The reinforcement layers 68 help the tube 61 withstand the internal pressure caused by the compressed air and prevent the tube 61 from expanding or bursting. The outermost layer of the tube 61 is the outer tube 69 or cover, which protects the inner layers 66, 68 from external damage, wear, and exposure to the natural environment. The outer tube 69 is typically made of synthetic rubber or a mixture of rubber with other materials. The outer tube 69 is designed to be resistant to oil, chemicals, UV light, and general wear and tear.

[0057] The compressed air storage device first and second couplers 64, 65 are connectors or fittings that allow for easy attachment to the compressor and other pneumatic tools or equipment. The fittings of the device first and second couplers 64, 65 can be made of brass, steel, or other durable materials and are typically threaded or equipped with quick connect mechanisms for secure and leak-free connections.

[0058] The configuration of the tube 61 can vary depending on the particular application, desired flexibility, and manufacturer's design.

[0059] In the power tool system 15, the power tool 100 is directly connected to the air compressor 1 via the compressed air storage device 60. That is, the device first coupler 64 is directly connected to the coupler of the exhaust valve 8 of the air compressor 1 without an intermediary structure or device. In addition, the device second coupler 65 is directly connected to the tool coupler 102 of the power tool 100 without an intermediary structure or device. Further, the compressed air storage device 60 stores compressed air for driving the power tool 100 during use.

[0060] The foregoing has described in considerable detail a select illustrative embodiment of a compressed air supply system including an air compressor and an air storage device. It should be appreciated that only structures deemed necessary to clarify the compressed air supply system have been described herein. Other conventional structures as well as those of ancillary and subsidiary components of the compressed air supply system are assumed to be known and understood by those skilled in the art. Moreover, while the foregoing has described working examples of the compressed air supply system, the system is not limited to the working examples described above, but rather can be subject to various design changes without departing from the system and / or components thereof as set forth in the claims.

Claims

1. An air compressor comprising: a compressor housing; a compressor pump disposed in the compressor housing, the compressor pump having an air inlet and an air outlet; a motor disposed in the compressor housing, the motor connected to the compressor pump and configured to drive the compressor pump; a pressure regulating device disposed in the compressor housing; an intake valve connected to the air inlet of the compressor pump via a first fluid line, the intake valve configured to selectively allow airflow from an environment of the compressor to the compressor pump; and an exhaust valve connected to the air outlet of the compressor pump via a second fluid line, the exhaust valve configured to selectively allow airflow from the compressor pump to an air storage device, wherein the compressor housing comprises: a hollow first cylindrical portion receiving and supporting the compressor pump and the pressure regulating device, the first cylindrical portion including a housing first end, a housing second end opposite the housing first end, and a cylindrical housing sidewall extending between the housing first end and the housing second end, the first cylindrical portion having a height dimension corresponding to a distance between the housing first end and the housing second end; a housing first flange disposed between the housing first end and an intermediate height of the first cylindrical portion, the housing first flange projecting outwardly from the housing sidewall and extending along a perimeter of the housing sidewall; a housing second flange disposed between the housing second end and an intermediate height of the first cylindrical portion, the housing second flange projecting outwardly from the housing sidewall and extending along a perimeter of the housing sidewall; and a spool rotatably supported on the compressor housing. the spool comprises:

2. The air compressor of claim 1, wherein, a hollow second cylindrical portion surrounding the housing sidewall, the second cylindrical portion including a spool first end, a spool second end opposite the spool first end, and a cylindrical spool sidewall extending between the spool first end and the spool second end, the second cylindrical portion having a height dimension corresponding to a distance between the spool first end and the spool second end; a spool first flange disposed between the spool first end and an intermediate height of the second cylindrical portion, the spool first flange projecting outwardly from the spool sidewall and extending along at least a portion of a perimeter of the spool sidewall; and a spool second flange disposed between the spool second end and an intermediate height of the second cylindrical portion, the spool second flange projecting outwardly from the spool sidewall and extending along at least a portion of a perimeter of the spool sidewall, wherein, the second cylindrical portion is concentric with the first cylindrical portion, and the spool first flange, the second cylindrical portion, and the spool second flange are disposed between the housing first flange and the housing second flange. the spool second flange includes a through-hole shaped and dimensioned to receive a tube of a compressed air storage device in a clearance fit.

3. The air compressor of claim 2, wherein, 4. The air compressor of claim 2, wherein, the housing second flange is disposed at the housing second end, ​ The spool sidewall includes a first through opening disposed between the spool second flange and the spool second end, The spool second flange includes a second through opening, and The first and second through openings are configured to receive a tube of a compressed air storage device in a clearance fit.

5. The air compressor of claim 1, comprising: a human machine interface (HMI) supported on an outer surface of the housing first end; and a controller disposed in the compressor housing, the controller being electrically connected to the HMI and configured to control operation of the compressor pump based on input received from the HMI.

6. The air compressor of claim 1, wherein, The second coupler is a quick connect coupler.

7. The air compressor of claim 1, wherein, The first coupler allows for 360 degree rotation between the air outlet valve and the tube.

8. The air compressor of claim 1, wherein, The air compressor is powered by a rechargeable battery disposed in the compressor housing.

9. The air compressor of claim 1, wherein, The air compressor is powered by a wired connection to a utility power source.

10. An air compressor system, comprising: a compressor housing; a compressor pump disposed in the compressor housing, the compressor pump having an air inlet and an air outlet; a motor disposed in the compressor housing, the motor being connected to the compressor pump and configured to drive the compressor pump; a pressure regulating device disposed in the compressor housing; an air inlet valve connected to the air inlet of the compressor pump via a first fluid line, the air inlet valve being configured to selectively allow airflow from an environment of the compressor to the compressor pump; and an air outlet valve connected to the air outlet of the compressor pump via a second fluid line, the air outlet valve being configured to selectively allow airflow from the compressor pump to an air storage device; and the air storage device, wherein the compressor housing comprises: a hollow first cylindrical portion receiving and supporting the compressor pump and the pressure regulating device, the first cylindrical portion including a housing first end, a housing second end opposite the housing first end, and a cylindrical housing sidewall extending between the housing first end and the housing second end, the first cylindrical portion having a height dimension corresponding to a distance between the housing first end and the housing second end; a housing first flange disposed between the housing first end and an intermediate height of the first cylindrical portion, the housing first flange projecting outwardly from the housing sidewall and extending along a perimeter of the housing sidewall; and a housing second flange disposed between the housing second end and an intermediate height of the first cylindrical portion, the housing second flange projecting outwardly from the housing sidewall and extending along a perimeter of the housing sidewall, and wherein, the air outlet valve is supported on the housing second end, the air storage device includes an elongate tube having a device first end separably coupled to the air outlet valve via a first coupler and a device second end opposite the device first end, the device second end including a second coupler, and the tube has sufficient flexibility to be bent into a loop having a radius corresponding to a radius of the housing sidewall.

11. The air compressor system of claim 10, comprising a spool rotatably supported on the compressor housing, the spool comprising: a hollow second cylindrical portion surrounding the housing sidewall, the second cylindrical portion comprising a spool first end, a spool second end opposite the spool first end, and a cylindrical spool sidewall extending between the spool first end and the spool second end, the second cylindrical portion having a height dimension corresponding to a distance between the spool first end and the spool second end; a spool first flange disposed between the spool first end and an intermediate height of the second cylindrical portion, the spool first flange projecting outwardly from the spool sidewall and extending along at least a portion of a circumference of the spool sidewall; and a spool second flange disposed between the spool second end and the intermediate height of the second cylindrical portion, the spool second flange projecting outwardly from the spool sidewall and extending along at least a portion of the circumference of the spool sidewall, wherein the second cylindrical portion is concentric with the first cylindrical portion, and the spool first flange and the spool second flange are disposed between the housing first flange and the housing second flange. The spool second flange comprises a through hole shaped and dimensioned to receive a tube of a compressed air storage device in a clearance fit.

12. The air compressor system of claim 11, wherein, 13. The air compressor system of claim 11, wherein the housing second flange is disposed at the housing second end, the spool sidewall comprises a first through opening disposed between the spool second flange and the spool second end, the spool second flange comprises a second through opening, and the first through opening and the second through opening are configured to receive a tube of a compressed air storage device in a clearance fit.

14. The air compressor system of claim 10, comprising: a human machine interface (HMI) supported on an outer surface of the housing first end; and a controller disposed in the compressor housing, the controller electrically connected to the HMI and configured to control operation of the compressor pump based on input received from the HMI. The second coupler is a quick connect coupler. The first coupler allows for 360 degrees of rotation between the exhaust valve and the tube.

15. The air compressor system of claim 10, wherein, The air compressor is powered by a rechargeable battery disposed in the compressor housing.

16. The air compressor system of claim 10, wherein, The air compressor is powered by a wired connection to a utility power source.

17. The air compressor system of claim 10, wherein, ​ 18. The air compressor system of claim 10, wherein, ​

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