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:
Jul. 18, 1978
Filed:
Jun. 29, 1977
Applicant:
Inventor:
Jack M Meyer, Neenah, WI (US);
Assignee:
Neenah Foundry Company, Neenah, WI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E02D / ;
U.S. Cl.
CPC ...
404 25 ; 210163 ;
Abstract
A manhole cover having no openings is provided with a blind pocket for insertion of a lifting tool and has a rectangular O-ring groove in the lower surface to receive a circular O-ring. The groove is so located as to cause the O-ring to engage the flat bearing surface of a conventional manhole cover frame. A complete seal against storm water is afforded.