Vacuum hold-down

Details Vacuum hold-down Vacuum hold-down

2004-04-23

2010-02-23

Wilson, Lee D (Department: 3727)

Work holders

With fluid means

Vacuum-type holding means

C269S020000, C269S2890MR

Reexamination Certificate

active

07665717

ABSTRACT:
A vacuum hold-down device comprising a base member (1) and a separate workpiece support (8) which co-operate to define a vacuum chamber. The device further comprises a venturi (15) having an inlet port (7) for connection to a source of pressurized fluid, an outlet (9) for fluid from the venturi, and a fluid connection (19, 5) from a low pressure region of the venturi (15) to the inside of the vacuum chamber, for providing a partial vacuum therein. The partial vacuum will hold the base member (1) and the workpiece support (8) together to maintain a peripheral seal therebetween. The workpiece support (8) is provided with securing means (16) for securing a workpiece (10) thereon. The invention also provides a vacuum hold-down system comprising the base member (1) and a plurality of interchangeable workpiece supports (8).

REFERENCES:
patent: 5775395 (1998-07-01), Wilkins
patent: 6513802 (2003-02-01), Seger
patent: 6857444 (2005-02-01), Davis
patent: 2006/0157905 (2006-07-01), Lenzini
patent: 2546790 (1984-12-01), None
patent: WO 9210336 (1992-06-01), None

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