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. 19, 1990
Filed:
Jan. 09, 1989
Applicant:
Inventor:
Roy E Johnson, Norwalk, CA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16J / ; F16J / ;
U.S. Cl.
CPC ...
277205 ; 52 20 ; 220378 ; 2772 / ; 285918 ; 404 25 ;
Abstract
An improved gasket for use with manhole covers. The gasket is of the type which is fabricated from rubber and is held in a circular groove formed in the flat cover support surface of a cast iron frame of the type which holes a manhole cover. The manhole cover fits in the frame and rests on the gasket. The improved gasket has a vertical portion which is generally rectangular which fits into the circular groove. The gasket also has a horizontal portion which extends beyond the groove and onto the flat cover support surface of the frame.