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:
Jan. 19, 1993
Filed:
Oct. 02, 1991
Applicant:
Inventors:
Douglas W Carlson, Kingwood, TX (US);
Stephen P Simons, Kingwood, TX (US);
Assignee:
Hydril Company, Houston, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
251-13 ; 2771 / ;
Abstract
There is disclosed a ram type blowout preventer with rams having ram front packings disposed within a recess extending across the front face of each ram body and including a seal strip of elastomeric material, metal plates above and below the strip of elastomeric material, and strips of non-elastomeric, relatively rigid material between the seal strip of elastomeric material and the top and bottom metal plates.