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:
Feb. 23, 1982
Filed:
Feb. 11, 1980
Applicant:
Inventors:
Randy S Baker, Long Beach, CA (US);
Gerald C Eckmann, La Puente, CA (US);
Assignee:
BJ-Hughes Inc., Long Beach, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ; F16K / ;
U.S. Cl.
CPC ...
166 53 ; 166325 ; 137116 ; 137540 ;
Abstract
A check/relief valve intended for use in an inflatable packer system. The valve comprises a hollow cylindrical longitudinally extending inner member surrounded by a spring loaded relief piston and a spring loaded check valve poppet, all surrounded by a hollow longitudinally extending outer member.