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:
Feb. 18, 1992
Filed:
May. 17, 1991
Richard A Dietz, Utica, MI (US);
Robert Laube, Mt. Clemens, MI (US);
Eugene R Andre, Sr, Huntington Woods, MI (US);
Hydra-Lock Corporation, Warren, MI (US);
Abstract
A zero-deflection support chuck is provided for gripping a load shaft which includes a stable support body having a bore, a gripping sleeve closely embracing the load shaft and a pressure sleeve within the bore and surrounding the gripping sleeve. The outer surface of the pressure sleeve is exposed to a pressure medium from a pressure source. The outer surface of the pressure sleeve has sealing lands at each end cooperating with the ends of the bore and a spiral groove and lands extending between the sealing lands. The lands between the grooves have the same diameter as the bore in the body. Pressure in the spiral grooves and the inner surface of the body bore moves the gripping sleeve tightly against the support shaft along the entire length of the sleeves and locks the shaft in a stable position.