Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support
Patent
1980-03-11
1982-04-06
Tollberg, Stanley H.
Elevator, industrial lift truck, or stationary lift for vehicle
Stationary lift for roadway vehicle or required component...
Having specific drive means for support
254 93HP, B66F 718
Patent
active
043231411
ABSTRACT:
A vehicle jack adapted to mount on a drive-on vehicle hoist comprises a lower platform suspended between the two rails of the hoist, an upper platform having a plurality of shoes adapted to contact the vehicle frame, an air bag between the upper and lower platforms to provide the force necessary to raise the vehicle from the rails, and a pair of scissor-type assemblies each having opposite corners attached to the upper and lower platforms respectively and adapted to maintain the upper and lower platforms in a parallel orientation. A plurality of latch plates connected to the upper platform are canted against latch posts mounted on the lower platform in such a way that downward movement of the upper platform is prevented unless the latch plates are moved out of contact with the posts. A pneumatic interlock system allows the latch plates to be moved only when there is sufficient air pressure in the air bag to support the vehicle. In this way, sudden collapse of the jack is avoided.
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patent: 4050545 (1977-09-01), Hunter
Ragan Marshall P.
Sytsma Peter H.
FMC Corporation
Megley Richard B.
Stanley Henry M.
Tollberg Stanley H.
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