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:
Sep. 22, 1981
Filed:
Sep. 24, 1979
Applicant:
Inventor:
Richard A Olson, Houston, TX (US);
Assignee:
Hydril Company, Houston, TX (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ; F15B / ;
U.S. Cl.
CPC ...
251 / ; 92 17 ; 92 24 ;
Abstract
A ram lock for blowout preventer rams which permits locking of the ram at multiple and adjustable positions. Automatic locking of the ram at a desired position, such as in adjustable sealing positions to compensate for ram elastomer wear, is obtained. The ram also automatically unlocks in response to opening fluid pressure acting on a cylinder liner which contains a ram carrier moving the ram.