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. 18, 1985
Filed:
Nov. 21, 1983
Applicant:
Inventor:
Roland M Howard, Jr, Houston, TX (US);
Assignee:
Koomey Blowout Preventers, Inc., Houston, TX (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
166 55 ; 166323 ; 251 / ;
Abstract
There is disclosed a ram-type blowout preventer having shear rams and fluid operated actuators for the shear rams which are of such construction as to move the rams inwardly to shear a pipe with a first, relatively large force, and then further inwardly to close the rams with a second, relatively small force, and which also includes locking elements adapted to be moved into positions locking the rams in closed positions automatically in response to inward movement of the rams to closed positions following shearing of the pipe.