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:
May. 20, 1986
Filed:
Apr. 16, 1984
Applicant:
Inventor:
A Michael Regan, Huntington Beach, CA (US);
Assignee:
Hughes Tool Company, Houston, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16L / ; F16L / ;
U.S. Cl.
CPC ...
285 24 ; 285101 ; 285108 ; 285917 ;
Abstract
A seal assembly has features to seal the junction of two passages. The assembly includes a piston with a seal on its face. The piston has a passage extending through it. Hydraulic fluid applied to an annular cavity moves the piston forwardly and rearwardly independent of fluid pressure in the passage. Once sealed, pressure in the passage acts on the end of the piston to maintain sealing engagement.