Work holders – With fluid means – Vacuum-type holding means
Patent
1992-12-18
1994-05-31
Watson, Robert C.
Work holders
With fluid means
Vacuum-type holding means
269 61, 269903, B23B 3130
Patent
active
053162765
ABSTRACT:
A system capable of automatically compensating for the thickness of a workpiece which comprises: at least one actuator assembly which comprises a vacuum chuck capable of supporting a workpiece thereon vacuum means capable of providing the vacuum chuck with sufficient vacuum for maintain the workpiece in contact with the vacuum chuck, the vacuum means including a centrally located vacuum conduit portion, means for adjustably securing the vacuum chuck to the vacuum conduit portion, actuator means rotatably disposed about the vacuum conduit portion, and means for reciprocally moving the actuator means such that its movement produces a similar reciprocal movement by the vacuum chuck; motor means and gear assembly connected to the means for reciprocally moving the actuator means; means for detecting the thickness of the workpiece; and means for controlling the motor means and gear assembly so as to move the actuator means, whereby the height of the workpiece can be automatically and continuously adjusted to the variable thickness of the workpiece.
REFERENCES:
patent: 3833230 (1974-09-01), Noll
patent: 4448403 (1984-05-01), Riessland et al.
patent: 4491306 (1985-01-01), Eickhorst
patent: 4493555 (1985-01-01), Reynolds
patent: 4742376 (1988-05-01), Phillips
patent: 4770531 (1988-09-01), Tanaka et al.
patent: 5010295 (1991-04-01), Lindsay
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