Lift assembly including a reaction switch

Details Lift assembly including a reaction switch Lift assembly including a reaction switch

1980-10-24

1983-10-04

Stoner, Jr., Bruce H.

Material or article handling

Self-loading or unloading vehicles

Loading or unloading by other carrier or mover means, and...

192129A, 192150, 280166, 414674, 414921, B60T 144

Patent

active

044076231

ABSTRACT:
A lift system for a transit vehicle includes a stationary main frame secured within a door recess of the vehicle and a side frame that is movable relative to the main frame. An articulated platform including steps pivotally secured to the side frame and scissor linkage pivotally and slideably connected to the main frame is also included. The lift system also includes a reaction switch coupled to the main frame to sense torque imparted to the main frame upon engagement of the platform with an obstacle such as a curb or the ground. If sufficient torque is created due to contact of the platform with an obstruction, the reaction switch is actuated to terminate further downward movement of the platform thereby preventing destruction of the system.

REFERENCES:
patent: 1828360 (1931-10-01), Conklin
patent: 4180366 (1979-12-01), Roth et al.

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