Patent Application
20140352808
The following relates to a pressure washer and more particularly to a pressure washer having a hose reel and a motor pump assembly disposed within the hose reel.
Hose reels are generally used for convenient and orderly storage of a garden hose. Generally, hose reels are either fixed to a part of the home or other fixed structure on the property or are transportable by the use of wheels or the like. Typically, the hose expels water at a pressure suitable for gardening. However, users typically try to use the hose to wash the sides of their houses or other outdoor structures.
In order to perform such tasks, it is desirable for the hose to be equipped with a pump to boost the pressure of the water stream to provide improved spraying distance and/or cleaning power, effectively turning the hose reel into a pressure assisted washer. However, pressure washers are sometimes heavy and unstable, such that they may tip or fall over during use as they tend to be top-heavy.
In one aspect, a pressure assisted washer is provided, said pressure assisted washer comprising: (a) a fluid inlet for receiving fluid; (b) a motor pump assembly comprising a motor, a pump in fluid communication with said fluid inlet, and a rotary coupling, said rotary coupling in fluid communication with an outlet of said pump, said motor pump assembly operable to pressurize said fluid and output pressurized fluid to said rotary coupling, said motor pump assembly having opposing side hubs defining a central axis, the rotary coupling rotatable about said central axis; (c) a frame comprising two side walls joined by said motor pump assembly and permitting access to said fluid inlet for receiving fluid; (d) a hose reel comprising a cylinder having a central bore and opposing circular side walls at ends of said bore, said hose reel being rotatable about said central axis, said cylinder having an aperture therethrough; and (e) a hose-reel connector disposed through said aperture in fluid communication with said rotary coupling.
In another aspect, a fluid pump having a rotary fluid outlet is provided, the fluid pump comprising: (a) a pump body having a cylindrical outer surface and an inner cylindrical bore; (b) a fluid inlet disposed at a first end of said bore, said fluid inlet permitting fluid to be provided to said fluid pump; (c) a fluid outlet, said fluid outlet being an arcuate aperture extending along a portion of a surface of said bore; (d) an impeller disposed at a second end of said bore such that said fluid outlet is disposed between said fluid inlet and said impeller, said impeller operable to pressurize said provided fluid and expel said pressurized fluid to said fluid outlet; and (e) a collar rotatably coupled to and encircling at least a portion of the length of said outer surface and completely surrounding said fluid outlet, said collar forming a cavity along said pump body and having a collar outlet, said collar outlet maintaining fluid communication with said fluid outlet.
The features of the invention will become more apparent in the following detailed description in which reference is made to the appended drawings wherein:
Embodiments will now be described with reference to the figures. It will be appreciated that for simplicity and clarity of illustration, where considered appropriate, reference numerals may be repeated among the figures to indicate corresponding or analogous elements. In addition, numerous specific details are set forth in order to provide a thorough understanding of the embodiments described herein. However, it will be understood by those of ordinary skill in the art that the embodiments described herein may be practiced without these specific details. In other instances, well-known methods, procedures and components have not been described in detail so as not to obscure the embodiments described herein. Also, the description is not to be considered as limiting the scope of the embodiments described herein.
The following provides a pressure assisted washer (hereinafter “pressure washer”) with hose reel and motor pump assembly. The pressure washer may be equipped with or coupled to a hose that could be a high-pressure hose or a typical garden hose. By providing pressurization, the capable length of the garden hose may be increased, for example to 50′ or more.
The hose reel defines a bore in which a motor pump assembly is disposed so as to provide a low centre of gravity and isolation of the motor pump assembly. The hose reel comprises a cylinder having an aperture through which pressurized fluid can be accessed through a coupling in fluid communication with a pump having a rotating collar coupled thereto.
It will be appreciated that the following pressure washer could alternatively be used as a pumping apparatus wherein fluid is input from a fluid reservoir and pumped to a desired location. It will further be appreciated that the pump with rotating collar described herein is not limited in application to a pressure washer.
Referring first to
Referring again to
A pair of coaxial rear wheels (128) extends from the side walls (106, 108). In use, the frame (104) is supported by the pair of wheels (128) and lower crossbar (112). The upper crossbar (110) serves as a handle. The wheels (128) may be located at approximately the left and right extents of the frame (104) to maximize stability. A user can transport the pressure washer (100) by tilting the pressure washer along the wheels' axis to raise the lower crossbar (112) from the ground, and subsequently rolling the pressure washer (100) to a desired location. In alternative embodiments, the rear wheels (128) may be dispensed with, resulting in a less easily transportable pressure washer, or could be a single or plurality of wheels. In the embodiment shown, the wheels are larger than is typical for a pressure washer, such as over 14″, though any suitable size will work.
The lower crossbar (112) may alternatively be replaced by wheels, providing a four-wheeled pressure washer, or by a plurality of legs. The lower crossbar (112) may comprise a substantially flat upper surface (130), providing a convenient location for a user to rest her foot to prevent movement of the pressure washer while reeling or unreeling the hose, as shown in
Referring again to
Referring again to
A crank (136) is disposed upon one of the side walls (108). The crank (136) may be disposed proximate the handle (110) end of the frame (104) so that it is more comfortably accessible by a user. More specifically, the crank (136) may be disposed at a distance suitable for use by a user with minimal discomfort, such as approximately waist to elbow height of a typical user.
As can be seen throughout the figures, the hose reel (114) is disposed relatively low to the ground; that is, with its central axis closer to the lower crossbar (112) than to the upper crossbar (110). In embodiments, hose reel (114) has minimal ground clearance when the pressure washer rests on the wheels (128) and lower crossbar (112). As will be appreciated, the hose reel (114), hose (102), and motor pump assembly (120) are likely to comprise the majority of the weight of the pressure washer and, therefore, having the hose reel (114) substantially low to the ground enables the pressure washer (100) to have a low centre of gravity.
Referring to
The surface of the cylinder (116) has an aperture (144) through which a hose-reel coupling (146) is disposed. The hose-reel coupling (146) enables a connection between the hose (102) reeled on the hose reel (114) and the motor pump assembly (120) disposed within the central bore (138) of the hose reel (114).
The motor pump assembly (120) comprises a load bearing portion comprising a pump body (168) and a motor cradle (150). The motor cradle (150) comprises a mounting surface between opposing vertical walls (160, 162). A motor (154) and integral or coupled gearbox (155) are mounted to the motor cradle (150) above its mounting surface between the two walls. Alternatively, if the motor (154) is of sufficient load-bearing capability, the motor (154) may serve the function of the motor cradle (150).
The motor (154) is electrically driven by electricity obtained via the electrical cord (176) to rotate a shaft (not shown) that in turn drives the gearbox (155). The gearbox (155) is mounted to and operatively coupled with the pump body (168) to drive the pump. The pump body (168) and gearbox (155) are mounted to one another in line with vertical wall (162). The other vertical wall (160) extends vertically at the end of the motor opposing its shaft end. A first hub (160) extends horizontally along the outer surface of the vertical wall (160) (that is, the surface opposite to the motor). The first hub (160) is coaxial with the pump body (168), which acts as a second hub, and is load bearing.
The opposing first hub (160) and pump body (168) are circular and have a diameter slightly less than the diameter of the central apertures (142) of the hose reel side walls. Note that while the apertures (142) are shown to be of the same diameter, they need not be so, provided that each of the first hub (160) and pump body (168) is of a diameter suitable for its mating aperture (142). Each of the first hub (160) and pump body (168) may be fastened to a frame (104) side wall (106, 108), for example using bolts (172). In the embodiment shown, three bolts (172) are integral with each of the first hub (160) and pump body (168) and extend through mating apertures (not shown) of the frame side wall. Nuts (not shown) may be threaded to the bolts (160, 168) to affix the first hub (160) and pump body (168) to the side walls (106, 108).
The central apertures (142) of the hose reel (114) side walls (140) rest freely upon the first hub (160) and pump body (168) and, as the central apertures (142) have a diameter slightly greater than the first hub (160) and pump body (168), are thus rotatable about the first hub (160) and pump body (168).
Referring now to
The gearbox (155) drives an impeller (307) that rotates within the pump body (168) to urge incoming fluid from the fluid inlet (304) toward a fluid outlet (306). The fluid outlet (306) is disposed between the fluid inlet (304) and the impeller (307) and is an arcuate aperture extending along a portion of the cylindrical surface of the bore (302).
A rotating collar (308) is rotatably coupled to and encircles at least a portion of the length of the outer surface (300) of the pump body (168) and completely surrounds the fluid outlet (306). The rotating collar forms a cavity (310) along the circumference of the encircled portion of the pump body (168) and has a collar outlet (312) in fluid communication with an outlet arm (166) further in fluid communication with the hose-reel coupling (146).
The rotating collar (308) further forms a substantially fluid-tight seal with the pump body (168) by a pair of O-rings (314, 316) disposed along either side of the cavity (310). The rotating collar (308) is held in place by a retainer ring (318) on one side and a shoulder (320) formed on the pump body (168) on the other side. Alternatively, an additional retainer ring could be provided in place of the shoulder (320).
Thus, the fluid inlet coupling is accessible proximate the outer surface of one of the side walls while the motor pump assembly and rotating collar (308) are fully enclosed within the hose reel (116) while the motor pump assembly, other than the rotating collar (308) and outlet arm (166), maintains a fixed orientation (i.e., is not rotatable) relative to the frame.
The hose reel (114) thus surrounds the motor pump assembly (120), while the hose-reel coupling (146) extends through the aperture (144) of the cylinder (116) and can be coupled to a hose (102) to be reeled on the hose reel (114). It will be appreciated that by enclosing the motor pump assembly (120) within the hose reel (114), the motor pump assembly (120) is substantially shielded from external contamination, such as dirt, debris and liquid.
In use, a user rotates the hose reel (114) until a desired length of hose (102) has been unreeled therefrom. During and following such rotation, the rotating collar (308) rotates about the pump body (168) such that the cavity (310) maintains fluid communication between the fluid outlet (306) and the collar outlet (312). Thus, regardless of the position of the hose reel, fluid communication between the pump's fluid outlet (306) and the hose (102) is maintained.
Upon a user activating the motor, the motor drives the gearbox which in turn drives the pump impeller, pressurizing water provided from the fluid inlet (304) and expelling the pressurized water from the hose (102). If the motor is not activated, the impeller is stationary and unpressurized fluid passes from the fluid inlet (304) to the hose.
Referring now to
Referring to
A motor pump switch (202) may be disposed upon a side wall (106) and may be electrically coupled to the motor pump assembly (120) to turn the motor (154) on or off. Preferably, the pressure washer (100) is operable regardless of whether the motor (154) is on or off, such that the pressure washer outputs fluid at an unassisted pressure when the motor (154) is off or at a higher pressure when the motor (154) is on. The switch (202) may be located at a height comfortable for a user to reach without bending over.
Although the invention has been described with reference to certain specific embodiments, various modifications thereof will be apparent to those skilled in the art without departing from the spirit and scope of the invention as outlined in the claims appended hereto. The entire disclosures of all references recited above are incorporated herein by reference.
