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. 25, 1996
Filed:
May. 02, 1995
Applicant:
Inventors:
Alec Ewen, Nazeing, GB;
Robert Gurney, Lake Bluff, IL (US);
John Lloyd, Deerfield, IL (US);
Michael Potts, Grayslake, IL (US);
Assignee:
Enfield Industrial Corporation, Lake Bluff, IL (US);
Primary Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
1562739 ; 1563082 ;
Abstract
A welded joint for a thermoplastic double containment pipes is formed by an apparatus including an electrofusion welding sleeve placed over the primary pipe, an electrofusion welding sleeve placed over the secondary pipe, clamps which concentrate their clamping pressure at preselected areas on the secondary pipe sleeve and anchor plates located on one or both opposite sides of the joint.