Work holders – With fluid means – Cylinder-piston means in series with additional positioning...
Patent
1991-01-29
1992-06-30
Watson, Robert C.
Work holders
With fluid means
Cylinder-piston means in series with additional positioning...
B23Q 308
Patent
active
051256320
ABSTRACT:
A workpiece holder includes first and second workpiece engaging members, one of which is rotatable with respect to the other. A rotary actuator drives the rotatable workpiece engaging member between two positions relative to the other workpiece engaging member. The rotatable actuator includes opposed, radially extending vanes mounted on a rotatable shaft extending through a hollow, closed body. The rotatable workpiece engaging member is fixedly connected to and rotatable with the rotatable shaft. The vanes are disposed in the hollow body and respectively create a pair of chambers between themselves and circumferentially spaced legs formed in the body and extending radially inward into the interior cavity of the body toward the rotatable shaft. Pressurized fluid is alternately supplied to and exhausted from each pair of chambers to exert force on and rotate the vanes, the rotatable shaft and the rotatable workpiece engaging member between the two positions. A mounting plate or arm is connected to the body for mounting the workpiece holder to a support surface.
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Blatt John A.
Tomlin David C.
Blatt John A.
Watson Robert C.
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