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:
Nov. 07, 2000
Filed:
Apr. 15, 1999
Applicant:
Inventor:
Jose E Valls, Jr, Ponce, PR (US);
Assignee:
Vassallo Research & Development Corporation, Coto Laurel, PR (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16L / ;
U.S. Cl.
CPC ...
277602 ; 277608 ; 277936 ; 285113 ; 285232 ;
Abstract
A composite gasket for forming a seal between a pipe bell and a spigot comprises a first axially disposed portion formed of an elastomeric material and has a first leading edge and a first trailing edge, and a second axially disposed portion, adjacent the first axially disposed portion, formed of a generally non-elastomeric substantially rigid plastic, which comprises multiple, axially extending, laterally spaced apart, ramp-like projections separated by circumferential valleys, which expose elastomeric material. Fluid entering the valleys during a high pressure surge force the composite gasket into a tighter seal.