Lift machine

Details Lift machine Lift machine

2011-01-11

2011-01-11

Langdon, Evan H (Department: 3654)

Elevator, industrial lift truck, or stationary lift for vehicle

Having specific load support drive-means or its control

Includes scissored supporting levers in drive-means

C187S211000, C254S122000

Reexamination Certificate

active

07866445

ABSTRACT:
A lift machine comprises a base, a support for supporting a load above the base, a lift actuator operatively connected between the base and the support for raising and lowering the support relative to the base, and a support stabilization mechanism operatively connected between the base and the support for stabilizing the support relative to the base during raising and lowering of the support by the lift actuator. The support stabilization mechanism comprises a pair of opposed linkages, with each of the pair of opposed linkages having a lower torque tube link and an upper torque tube link. The lower torque tube link has a torque tube operatively pivoted to the base. The upper torque tube link has a torque tube operatively pivoted to the support. The pair of opposed linkages are interconnected in such a manner that the pair moves in synchronization during raising and lowering of the support by the lift actuator and maintains the support substantially level even in the event that the center of mass of the load is offset from a vertical axis of the lift actuator.

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