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:
Aug. 19, 1986
Filed:
Aug. 15, 1985
James M Royston, Pittsburgh, PA (US);
Coupling Systems, Inc., Pittsburgh, PA (US);
Abstract
A pipe coupling is provided having a sleeve with frusto-conical ends, elastomeric gaskets fitting in said frusto-conical ends, a follower at each end of the sleeve, tightening bolts acting on the followers to move them axially together to compress the elastomeric gaskets radially into sealing engagement with the pipe ends, a back up ring having a frusto-conical opening spaced from each follower opposite the sleeve, frusto-conical opening in each said back up ring having its largest opening toward said sleeve, a frusto-conical split jaw in each back up ring and auxiliary tightening means for moving the back up rings towards the adjacent followers to compress said jaws into the pipe ends.