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:
Nov. 11, 1986
Filed:
Nov. 30, 1984
Applicant:
Inventor:
Edward D Gailey, Mentor, OH (US);
Assignee:
The S-P Manufacturing Corporation, Cleveland, OH (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01B / ;
U.S. Cl.
CPC ...
92106 ; 384276 ; 384295 ; 384624 ; 279-4 ;
Abstract
A rotary hydraulic cylinder for actuating a rotary work holder, on a machine tool. A non-rotary fluid distributor is supported on the cylinder by a bearing sleeve. The bearing surface of the sleeve has an anti-friction coating. The sleeve is rotatable within a housing and is frictionally restrained from rotation under normal operating conditions by O-rings, but can rotate in the event of bearing seizure. Sleeve rotation is sensed through a proximity switch to stop operation of the machine tool.