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. 05, 1998
Filed:
Jul. 24, 1996
Michael C Webb, Chester Springs, PA (US);
Environ Products, Inc., Exton, PA (US);
Abstract
A pipe coupling assembling for use with a pipe having an inner wall, an outer wall and an interstitial space between the walls, with the pipe terminating in a coupling end defining an axial direction. The assembly includes a ferrule attached to the outer wall. The ferrule has an outer annular ring and an interstitial channel aligned with the interstitial space in the pipe for presenting an interstitial chamber. An insert is attached to the inner wall. The insert also has an inner annular ring. An externally threaded transition fitting is removed for attachment to the ferrule. The fitting includes an interstitial channel aligned with the interstitial chamber, an outer seal channel for sealing engagement with the outer annular ring, and an inner seal channel for sealing engagement with the inner annular ring. Finally, a coupling is keyed to the ferrule including internal threads for engagement with the fitting to provide coupling engagement between both the ferrule and the insert with the fitting.