Vacuum chamber slit valve

Details Vacuum chamber slit valve Vacuum chamber slit valve

1987-04-20

1988-11-22

Hall, George T.

Receptacles

Closures

With closure opening arrangements for means

220263, 220264, B65D 4314

Patent

active

047859628

ABSTRACT:
A slit valve for sealing an access opening in a vacuum chamber. The slit valve body or door is pivotally mounted adjacent the opening and has a pair of cam blocks mounted at its opposite ends. Cam follower rollers are mounted on a swing arm for reversible pivotal door opening and closing movement effected by a pneumatic cylinder. During closing movement of the swing arm, the cam followers engage the cam block and resiliently pivot the slit valve against the opening. Upon reversed, pivotal opening movement, the cam followers release from the cam block, allowing a spring to return the door to a normally opened position. The slit valve mounting is adapted to provide equal compressive sealing, both top-to-bottom and side-to-side.

REFERENCES:
patent: 4655362 (1987-04-01), Ecker et al.
patent: 4673101 (1987-06-01), Guarino et al.

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