1. Field of the Invention
The present invention relates to snow removal, and more particularly to a wheeled snow plow assembly having an adjustable handle and a mechanism for efficiently releasing the snow from a pivotally attached scoop.
2. Description of the Related Art
U.S. patent Publication No. 2001/0029685, published October 2001, discloses a snow shovel which includes a handle mounted to an intermediate portion of a base of a mobile frame such that the handle can undergo pivotal movement between selected vertical angles relative to the base and a tool adjustably mounted to a front end of the base.
U.S. patent Publication No. 2001/0045029, published November 2001, discloses a manually operated snowplow blade and an attachment apparatus to be secured to the front of a contractor's type wheelbarrow.
U.S. patent Publication No. 2002/0047251, published April 2002, discloses a hand cart apparatus that will allow the user easy loading of bulky and heavy items into a wheeled bin by having an open end at or near load/ground height which aids in shoveling/scooping loads, transporting the loads contained in the bin, and then dumping, shovel or slide out the contents of the bin.
U.S. Pat. No. 830,871, issued to R. Wilken in September 1906, discloses a snowplow having a blade pivotally supported at the forward end of a frame mounted on wheels and provided with handles by which the device is operated. The height of the blade is adjustable as well as the position of the blade relative to the line of travel of the machine.
U.S. Pat. No. 4,224,751, issued to Schoemann et al. in September 1980, discloses a snow removal comprising a frame, a flexible scoop, and a mechanism for flexing and relaxing the scoop.
U.S. Pat. No. 4,910,893, issued to Z. Asay in March 1990, discloses a wheeled chassis having a pair of wheels and a preferably V-shape handle, pivotally secured to a slide member mounted to the chassis. A variety of utility devices, such as a snow plow, scraper, weeder, etc., may be removably secured to the front of the chassis and provisions may be made to removably secure a variety of utility devices, such as a cultivator, rake, weeder, etc. behind the wheels.
Similar wheeled snow shoveling devices are disclosed in U.S. Pat. No. 5,511,327 issued to Jurbowski et al. in April 1996 and U.S. Pat. No. 5,581,915, issued to E. Lobato in December 1996.
Canadian Patent Application No. 2323917, published in April 2002, discloses an all season multi-purpose shovel and wheelbarrow combination. The device moves along the ground at varying heights scooping up any loose material to be shoveled and transported to another location. The container is attached to a wheeled frame, which is pushed by handles after being rotated to a horizontal position. Upon reaching a desired location the container can be dumped by the use of straps to rotate the container.
While many of the above devices disclose mechanisms for adjusting the height or angle of the snow scoop, they lack an efficient method of transporting the contents of the scoop to a different location and then releasing the contents of the scoop.
None of the above inventions and patents, taken either singly or in combination, is seen to describe the instant invention as claimed. Thus a snow shovel solving the aforementioned problems is desired.
The snow shovel of the present invention is designed to scoop up a pile of snow easily and with minimal effort, to transport the contents to another location, and upon operation of a lever releases its load.
The handle of the snow shovel is telescoping, providing a number of uniformly spaced adjustable lengths. Furthermore, the handle is capable of pivoting about a vertical axis thereby providing a selection of lockable positions in order to provide the most leverage in operating the shovel.
A wheel assembly mounted to an intermediate portion of the frame supports the frame in an inclined position, allowing the user to concentrate on applying force in a forward direction rather than expending effort lifting the handle. The wheel assembly is pivotally mounted to the frame, allowing the wheel assembly to fold against the frame for storage when not in use.
The scoop portion is pivotally mounted to the lower end of the frame and upon activation of a release lever, the scoop head releases its load.
Similar reference characters denote corresponding features consistently throughout the attached drawings.
The present invention is a snow shovel, designated generally as 100 in the drawings. As shown in
The handle assembly 104 includes a transverse handle bar 106 having spaced apart handgrips 112 disposed on each end. A stem 108 depending from the center of the handle bar 106 is rotatably mounted to a handle pivoting assembly 110 disposed on the upper telescoping member 122 of the frame 102. The pivot mechanism 110, allows a user to adjust the angle of handle assembly 104, thereby providing the user with the optimum height for operating the snow shovel 100. A handle angle adjusting lever 114 is operative to allow the user to rotate the handle assembly 104 to one of several uniformly spaced positions, and is mounted on one end of handle bar 106. The lever 114 is connected by means of a flexible cable 118 to the handle pivoting assembly 110.
A wheel assembly 105 is mounted to an intermediate position on the lower portion 124 of the telescoping frame 102. The wheel assembly 105 includes a pair of wheels 130 rotatably connected to a pair of struts 132, each strut 132 pivotally connected to a support bracket 136. In normal operation, the wheels 130 and struts 132 extend out from a position parallel to the frame 102 and by means of a locking pin (not shown) lock into a position normal to frame 102. The wheels 130 may be folded back to the frame 102 for storage.
Fixedly mounted to the rear 140 of the scoop 126 is a mounting block 702 best seen in
As shown in
Upper end 404 has bores 438 uniformly spaced in a circular pattern on its right side, and has an axle bore 436 cut through its center. End 404 is rotatably secured within the pivot assembly 110 by means of threaded axle pin 430, the pin 430 having a shaft 431, a head 433, and a threaded end 432, the shaft 431 having a diameter smaller than its head 433. The threaded end 432 passes through an aperture 434 defined on the left side 402 of the pivot assembly 110, through bore 436 in the stem end 404 and is captured by a threaded recess defined on the right side 420 of the pivot assembly 110.
End 404 of upper telescoping stem 122 is held in a selected angular position by means of four retractable pins 422, which are received by four of the eight bores 438 previously disclosed. A coil spring 428, encompassing each pin 422, provides a horizontal biasing force seating one end of the pin 422 within the bore 438. The other end 424 of the pin passes through an aperture 418 cut in the right wall 420 of the pivot assembly 110. Connected to the end 424 of each pin is a wire 408 extending from the end 416 of flexible cable 118 which threadedly received by aperture 414 in support guide 410. Support guide 410 secures the sheath of cable 118 while allowing the wire 408 to move freely within the sheath and support guide 410.
As previously disclosed, the telescoping elongated frame 102 allows a user to adjust the length of the frame 102 to increase the mechanical advantage of the snow shovel 100. As shown in
As shown in
As best shown in
An “L” shaped lever 810 is pivotally mounted to the cross member 808 by lever bracket 812, one end of the lever 810 passing through an aperture 816 cut through the top of the plunger 814. The other end of the lever 810 is connected to a flexible wire 826 extending from the lower end of flexible cable 120, which in turn is connected to the scoop release lever 116.
As shown in
Upon the release of scoop release lever 116, the spring 824 applies biasing force against the latch 818, forcing the latch 818 downward towards its “latched” position. The arcuate abutment surface 910 is adapted to engage the angled abutment surface 840 of latch 818, slidably displacing latch 818 until the scoop 126 has attained it “latched” position, at which point the latch 818 slides downward locking the scoop 126 in place.
It is to be understood that the present invention is not limited to the embodiment described above, but encompasses any and all embodiments within the scope of the following claims.