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:
Jun. 05, 1990
Filed:
Aug. 25, 1987
Applicant:
Inventor:
Nachum Rosenzweig, Palo Alto, CA (US);
Assignee:
Raychem Corporation, Menlo Park, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
156 85 ; 156 86 ; 156158 ; 264230 ; 2643 / ; 285381 ; 285423 ; 219535 ; 219544 ;
Abstract
A coupler for joining polymeric pipes comprises a generally cylindrical radially heat-shrinkable member which is composed of a conductive polymer. To recover the coupler, current is passed axially through the coupler via electrodes. The coupler has a center portion of increased wall thickness and in this way, when there is a gap between the pipes, overheating of the center portion of the coupler is avoided.