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. 13, 1990
Filed:
May. 30, 1989
Applicant:
Inventor:
Bolie C Williams, III, Houston, TX (US);
Assignee:
Cooper Industries, Inc., Houston, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F15B / ;
U.S. Cl.
CPC ...
92 28 ; 92 27 ; 92 19 ; 92 15 ; 9216 / ; 251-11 ; 251-12 ; 251-13 ;
Abstract
A new and improved ram locking apparatus for blowout preventer rams which allows the rams to be locked in the closed position and compensates for wear on the sealing elements of the rams. The device consists of a tubular cross containing a rod extension with a tapered end attached to the ram, a hydraulically reciprocal piston with a wedging surface to coact with the tapered end of the rod extensions and hydraulic fluid ports. The tapered end of the rod and the wedge surface of the piston have serrated surfaces to increase friction between the wedging surfaces and provide a self-locking engagement and thereby provide a small compact apparatus.