Lift pin alignment and operation methods and apparatus

Details Lift pin alignment and operation methods and apparatus Lift pin alignment and operation methods and apparatus

2005-08-30

2005-08-30

Matecki, Kathy (Department: 3652)

Elevator, industrial lift truck, or stationary lift for vehicle

Having specific load support drive-means or its control

C414S757000, C414S217000, C414S804000, C414S935000, C118S724000, C118S728000, C156S345540

Reexamination Certificate

active

06935466

ABSTRACT:
A lifting mechanism includes a plurality of lift pins which may be driven separately and independently upward to engage an alignment surface of the chamber using ambient atmospheric pressure as the chamber is evacuated by a pump. In the illustrated embodiment, each lift pin includes a piston which is exposed to the internal chamber pressure on one side of the piston, and is exposed to the external ambient pressure on the other side of the piston. As the pump evacuates the chamber, the internal chamber pressure decreases, causing each lift pin piston to drive the associated lift pin upward. Once all the lift pins have securely engaged the alignment surface, the lift pins may be clamped to a linking mechanism to permit a motor to actuate the lift pins during processing operations.

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