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. 07, 1986
Filed:
Sep. 27, 1984
Applicant:
Inventors:
Ronald E Pringle, Houston, TX (US);
Arthur J Morris, Magnolia, TX (US);
John J Johnson, Houston, TX (US);
Assignee:
Camco, Incorporated, Houston, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04F / ;
U.S. Cl.
CPC ...
137155 ; 166319 ;
Abstract
An injection valve for injecting chemicals into a well which is actuated by a piston having an upwardly and a downwardly directed metal cup seal with a resilient seal therebetween and a gas pressure charge above the piston acting to close the injection valve. Oil may be provided in the body between the gas charge and the piston for acting as a barrier. The gas charge may be placed in a closed gas container having a rupturable portion with a piercing means for opening the container. The container may include oil.