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. 08, 1981
Filed:
Apr. 02, 1979
Applicant:
Inventor:
Anthony R Richardson, Los Altos, CA (US);
Assignee:
Raychem Corporation, Menlo Park, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C / ; B32B / ; H02G / ; B28B / ;
U.S. Cl.
CPC ...
156 86 ; 174 / ; 174 / ; 174D / ; 264139 ; 264162 ; 264173 ; 264230 ; 428 36 ;
Abstract
Radially shrinkable sleeves for covering joints and terminations in high voltage cables are made by radially uniform machining of an extrudate comprising an insulating layer and at least one other layer which is conductive or semi-conductive or exhibits stress control properties. Expansion of the sleeve can be effected before or after machining. Novel shrinkable sleeves which are obtainable by this method include an insulating layer which comprises at least one tapered section in which its internal diameter increases gradually from a first diameter to a second diameter.