Machine tool with improved workpiece holddown system

Details Machine tool with improved workpiece holddown system Machine tool with improved workpiece holddown system

1998-07-01

2000-07-18

Pitts, Andrea L.

Gear cutting, milling, or planing

Milling

Work support

83451, B23D 708

Patent

active

060898011

ABSTRACT:
A machine tool generally consisting of a base member; a table mounted on the base member having a workpiece support surface, a plenum and at least one port in the support surface of the table communicating with the plenum; means communicable with the plenum for producing a vacuum therein; a check valve including a body disposable on the table in blocking relation with the port, having a passageway therethrough intercommunicating the plenum and the exterior of the table when the valve body is disposed in blocking relation with the port, and a valve element disposed in the body passageway of the valve body displaceable between a first position under a first condition blocking the body passageway and a second position under a second condition unblocking the body passageway; and a tool operatively engageable with a workpiece positioned on the table overlying the check valve when the valve element of the check valve is in the second position under the second condition.

REFERENCES:
patent: 4049484 (1977-09-01), Priest et al.
patent: 4723766 (1988-02-01), Beeding
patent: 4906011 (1990-03-01), Hiyamizu et al.
patent: 5177857 (1993-01-01), Ito
patent: 5316255 (1994-05-01), Marcusen
patent: 5374829 (1994-12-01), Sakamoto et al.
patent: 5553837 (1996-09-01), Kahle
patent: 5562276 (1996-10-01), Blick
patent: 5660380 (1997-08-01), Reis et al.

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