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. 10, 1999
Filed:
Feb. 14, 1997
Ralph S Friedrich, Hermosa Beach, FL (US);
Paul Kubat, La Mirada, CA (US);
Ameron International Corporation, Pasadena, CA (US);
Abstract
A double containment coupling is used to form a mechanical joint between double containment pipes. The coupling has an inner primary member within an outer secondary member. Two seals, one on top of the other, are fitted on top of the primary pipe which extends beyond the secondary pipe of the double containment pipe. The coupling inner member is fitted over the primary pipe and seals. An inner locking nut is threaded on the coupling inner member outer surface pushing a thrust ring onto one of the seals, sliding the seal over the other seal compressing and energizing both seals so as to create a seal between the primary pipe and the coupling inner member. A first end of a closure member is threaded onto the outer surface of the coupling outer member. An outer locking nut threaded on a second end of the closure member compresses a seal between the closure member and the secondary pipe creating a seal between the closure member and the secondary pipe outer surface.