Land vehicles – Wheeled – Stable vehicles – handle-propelled
Reexamination Certificate
2000-08-25
2003-01-21
Johnson, Brian L. (Department: 3618)
Land vehicles
Wheeled
Stable vehicles, handle-propelled
C280S047310, C280S653000
Reexamination Certificate
active
06508478
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to wheelbarrows, and more particularly to an auxiliary wheeled frame for wheelbarrows.
2. Description of the Related Art
The usefulness, function and usage of wheelbarrows are well known to those involved in Construction, gardening, and other activities where loads are moved and transported from one location to another. The wheelbarrow is a unique tool in that a relatively heavy load may be balanced and moved in relatively confining or inaccessible locations. Wheelbarrows are often also used to transport heavy loads over rough and difficult terrain where other means of transport are not practicable. Often repeated loads of great size in a wheelbarrow is more than the ability of the operator to safely manage utilizing only the front wheel. In such instances, additional rear support which provides for mobility of the wheelbarrow is desired and saves the operator from the repeated strain of manhandling the wheelbarrow.
Heretofore, many attempts have been made to modify wheelbarrows to assist in their unique functions. However, modifications described to address perceived problems include many different types. However, none provide for an auxiliary wheeled frame for wheelbarrows in the manner which is provided for in the present invention.
U.S. Pat. No. 5,878,827, issued Mar. 9, 1999 to Fox teaches a motorized wheelbarrow having a mounting element secured to the frame for supporting a drive engine and a drive mechanism which is operatively linked to a drive wheel.
U.S. Pat. No. 5,509,681, issued Apr. 23, 1996 to Keller teaches a kit and method for converting a wheelbarrow into a garden cart whereby a wheelbarrow is used as a towed garden cart, and having rear wheel assemblies mounted to each of the depending legs of the wheelbarrow and a front hitch plate releasably attached to the forward ends of beams adjacent a brace. The rear wheel assembly has an axle tube adapted to mount to each of the rear legs and axles bearing wheels releasably mounted within each of the axle tubes.
U.S. Pat. No. 5,489,000, issued Feb. 6, 1996 to Hillbohm teaches a motorized wheelbarrow having a wheel arranged to bear on the ground and a motor arranged to rotate the wheel for moving the wheelbarrow over the ground.
U.S. Pat. No. Des. 364,020, issued Nov. 7, 1995 to Wang teaches a wheeled dolly for golf bags.
U.S. Pat. No. 5,106,113, issued Apr. 21, 1992 to Piacentini teaches a wheel support structure for a cart having two separate wheel axis each carrying a wheel with each wheel axis being mounted on a holding arm which is pivotable about a vertical frame.
U.S. Pat. No. 5,031,926, issued Jul. 16, 1991 to Wannamaker teaches a wheelbarrow conversion kit for utilizing a wheelbarrow as a garden tractor having an elongate frame rail rotatably mounting a wheel at each end and an elongate tongue which is orthogonally mounted to the frame member whereby the frame member is secured to or adjacent the “U” shaped frame supports of the wheelbarrow.
U.S. Pat. No. 4,767,128, issued Aug. 30, 1988 to Terhune teaches a wheelbarrow construction having a receptacle unit, a forward wheel assembly, a main load support unit with adjustable handle means, a rear wheel trailer unit and an automatic brake unit. The rear wheel trailer unit has a set of swivel castor wheel assemblies operatively connected to a second frame member at the juncture of the frame member support arms with the frame member crosspiece. The operative connection between the castor wheel assemblies and the rear wheel trailer unit has a generally cylindrical housing member formed on the outboard ends of the frame member cross-piece which projects beyond the forwardly extending support arms and an upper and lower bearing assembly.
U.S. Pat. No. 4,589,508, issued May 20, 1986 to Hoover et al. teaches a motorized wheelbarrow having an engine to drive the wheel of the wheelbarrow and a friction drive transmission mechanism which allows the wheelbarrow to be driven in either a forward or reverse direction and also allows it to stand in neutral.
U.S. Pat. No. 4,061,349, issued Dec. 6, 1977 to Stahl teaches an auxiliary wheel assembly mounted on a selected portion of a wheelbarrow and includes a wheel adapted to be pivoted forwardly and secured in an elevated condition.
U.S. Pat. No. 4,052,079, issued Oct. 4, 1977 to Lehman teaches a wheelbarrow transport means having a wheelbarrow leg structure supported on a dolly which is towed by a garden tractor or the like, which dolly is provided with castor wheels.
U.S. Pat. No. 3,891,043, issued Jun. 24, 1975 to Valdex teaches a self-propelled earth moving device being a wheelbarrow having an attachable swiveling carrier and a motor attached to a mounting member below the bucket of the wheelbarrow.
U.S. Pat. No. 1,735,527, issued Nov. 12, 1929 to Cwik teaches a wheelbarrow with an auxiliary adjustable rear wheel for relieving the operator of a portion of the load.
U.S. Pat. No. 1,095,145, issued Apr. 28, 1914 to Elterich teaches a wheelbarrow having a second or trailer-wheel which tracks upon the ground and relieves the operator of the weight of the load.
None of the art as identified above, either individually or in combination, describes an auxiliary wheeled for wheelbarrows in the manner provided for in the present invention.
SUMMARY OF THE INVENTION
The goal of the present invention is to provide an auxiliary wheeled frame for wheelbarrows that does not have the drawbacks and limitations of the devices of the prior art.
An object of the present invention is to provide an auxiliary wheeled frame for wheelbarrows which is lightweight, strong, balanced, and efficient at carrying and transporting a wide range of load sizes and weights.
Another object of the present invention is to provide an auxiliary wheeled frame for wheelbarrows which is economical to produce and easily applied to a wheelbarrow.
These and other objects are achieved by providing an auxiliary wheeled frame for wheelbarrows that comprises a lateral beam being attached to the legs of a typical wheelbarrow and having attached at a bottom outer end thereof a plurality pivotable, rotating wheels one each attached at each exterior end of the lateral beam exterior to a position where the legs of a typical wheelbarrow normally rest on the ground. A plurality of braces are provided with the braces being secured one each to an upper side of said lateral beam immediately interior of each rotating wheel and to one each of the legs of a typical wheelbarrow. A horizontal cross bar is provided with the horizontal cross bar being secured between interior portions of each of the legs of a typical wheelbarrow. The rotating wheels may be removably attached, may have brake means, and may be castor-type wheels. The braces further comprise may be removably attached to the legs of a typical wheelbarrow by means of a plurality of spaced holes, nuts, and bolts, which plurality of spaced holes provide for vertical adjustment of the braces on the legs of a typical wheelbarrow, or may be permanently attached to the legs of a typical wheelbarrow. A plurality of second diagonal bars may be secured between interior portions of each of the legs of a typical wheelbarrow, which second diagonal bars are attached to the legs of a typical wheelbarrow interior and adjacent to the brace, and further attached to the legs of a typical wheelbarrow midpoint between the attachment of the bottom of the brace and the attachment of the horizontal cross bar to the leg of a typical wheelbarrow. The lateral beam may have a toolbox.
REFERENCES:
patent: 961719 (1910-06-01), Hubbard
patent: 1095145 (1914-04-01), Elterich
patent: 4052079 (1977-10-01), Lehman
patent: 4758010 (1988-07-01), Christie
patent: 5031926 (1991-07-01), Wannamaker
patent: 5415421 (1995-05-01), Godwin
patent: 5687979 (1997-11-01), Plevka
patent: 6220622 (2001-04-01), Garcia
patent: 2073677 (1981-10-01), None
Johnson Brian L.
Klebe G B
LandOfFree
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