The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 30, 1992
Filed:
Jan. 29, 1991
John A Blatt, Grosse Pointe Shores, MI (US);
David C Tomlin, Mt. Clemens, MI (US);
Other;
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.