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:
Apr. 02, 1985
Filed:
Mar. 07, 1983
Applicant:
Inventor:
John Ditcher, Langhorne, PA (US);
Assignee:
A-Lok Products Corporation, Trenton, NJ (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F16L / ; F16J / ;
U.S. Cl.
CPC ...
277189 ; 277 343 ; 2772 / ;
Abstract
A circular gasket for sealing the opening between the exterior of a sewer pipe and the interior periphery of an opening in a manhole, in which greater sealing pressure is provided by using a plurality of longitudinal openings extending entirely around the gasket through the head portion thereof which contacts the sewer pipe.