Implements or apparatus for applying pushing or pulling force – Rocking supports
Patent
1976-07-19
1977-07-12
Smith, Al Lawrence
Implements or apparatus for applying pushing or pulling force
Rocking supports
188 32, F16M 1300
Patent
active
040349616
ABSTRACT:
A drive-on rockable leveling device for elevating a vehicle wheel has an arcuate drive-on surface which intersects an arcuate ground-engaging surface to form a blunt-pointed forward end. The drive-on surface preferably has a radius of curvature which is substantially equal to or slightly greater than that of the wheel to be elevated, thereby maximizing the surface area of engagement between the wheel and the leveling device. The ground-engaging surface has a radius of curvature which is substantially less than that of the drive-on surface to provide a rapid rocking action which will effectively reduce the angle of ramp inclination seen by a wheel supported atop the leveler. Spaced traction lugs are provided along the drive-on surface and along the ground-engaging surface. A wedge-shaped retaining block has an upper surface configured to mate with the ground-engaging surface of the leveler to positively retain the leveler in place once a wheel is supported atop the leveler. The retaining block can be used separately as a wheel chock.
REFERENCES:
patent: 1947346 (1934-02-01), Lintern
patent: 1996612 (1935-04-01), Cook
patent: 2712432 (1955-07-01), Thornton
patent: 3065680 (1962-11-01), Wiedman
patent: 3298665 (1967-01-01), Sieloff
patent: 3661229 (1972-05-01), Stonhaus
patent: 3664466 (1972-05-01), Rothelsen
patent: 3684233 (1972-08-01), Vukich
patent: 3770323 (1973-11-01), Isaacson
Smith Al Lawrence
Watson Robert C.
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