Implements or apparatus for applying pushing or pulling force – Multiple lifters
Patent
1999-04-15
2000-08-15
Scherbel, David A.
Implements or apparatus for applying pushing or pulling force
Multiple lifters
254 88, 254420, 254 90, E02C 300
Patent
active
061023701
ABSTRACT:
A trailer with expandable sides and retractable wheels used for performing on site vehicle maintenance and repair services. The trailer has a rectangular frame mounted on wheels with a conventional trailer coupler for attachment to a towing vehicle. The wheels are pivotally mounted to the frame, the wheels being locked in a ground engaging position for towing the trailer, and being unlocked so that the frame may be lowered into a ground engaging position by a plurality of hydraulic cylinders for the servicing of vehicles. The frame includes a plurality of crossbeams. A pair of side extenders telescope into the front, rear and center crossbeams so that the width of the trailer may be extended by hydraulic cylinders with the frame in a ground engaging position. The trailer includes a two-post hydraulic vehicle lift for raising the vehicle to be serviced.
REFERENCES:
patent: 3931895 (1976-01-01), Grimaldo
patent: 4238114 (1980-12-01), Migliorati
patent: 4350222 (1982-09-01), Lutteke et al.
patent: 4394877 (1983-07-01), Whyte
patent: 4445665 (1984-05-01), Cray
patent: 4724875 (1988-02-01), Baldwin et al.
patent: 4772038 (1988-09-01), MacDonald
patent: 5340082 (1994-08-01), Holloway
patent: 5904339 (1999-05-01), Flinn
Litman Richard C.
Scherbel David A.
Wilson Lee
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