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:
Apr. 22, 1986
Filed:
Jul. 08, 1985
Applicant:
Inventor:
Arthur Ahlstone, Ventura, CA (US);
Assignee:
Other;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16K / ;
U.S. Cl.
CPC ...
13724622 ; 137553 ; 251-13 ; 277 / ;
Abstract
A ram-type blowout preventer having a removable seal insert contained in an insert cavity formed in the forward end of the ram body. Each seal insert includes an elastomeric body which forms an inner seal portion having a forward seal face and two outer seal portions which extend laterally into slot openings in the ram body. In each seal face is set a rigid cup which defines a cup-shaped cavity. When the rams are brought together to close the valve the two cups join together rim-to-rim to form a grease chamber between the seal forces.