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:
Dec. 11, 1979
Filed:
Dec. 15, 1977
Applicant:
Inventor:
Emil E Dopyera, Houston, TX (US);
Assignee:
Big-Inch Marine Systems, Inc., Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16L / ; F16L / ;
U.S. Cl.
CPC ...
285 18 ; 29428 ; 277190 ; 277236 ; 285 96 ; 285342 ;
Abstract
A locking slip joint has primary utility in the making up of a tie-in in pipeline laying and repair operations. In a preferred embodiment the slip joint comprises an inner sleeve telescopically received within an outer sleeve. Means for locking the sleeves together is disposed in an annulus between the sleeves and comprises a seal ring having annular teeth in communication with both sleeves. A pair of opposed tapered annular pistons engage mating recesses in the seal ring and are hydraulically actuated to deform the seal ring outwardly thereby embedding the teeth into both sleeves. The embedment provides an irreversible metal-to-metal seal.