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:
Sep. 01, 2015
Filed:
May. 05, 2014
Willerding Acquisition Corp., O'Fallon, MO (US);
Kenneth Michael Wasiuta, Foristell, MO (US);
Scott R. Peters, Warrenton, MO (US);
Gary Bertolucci, Chesterfield, MO (US);
Willerding Acquisition Corp., O'Fallon, MO (US);
Abstract
A manhole riser extension assembly including separate upper and lower spacer rings which are assembled utilizing tabs that extend downwardly from the upper spacer ring about the lower spacer ring, and locking elements in association with the lower ring that cooperatively engage and bear radially outwardly against the tabs, respectively, to urge and/or lock the tabs against an inner surface of the manhole frame bounding the manhole cover seat, or to penetrate the tabs and bear against the inner surface, to hold the assembly together and in place in the manhole frame, and such that a manhole cover is positionable in sitting relation on the lower spacer ring, bounded by the upper spacer ring for covering the manhole. Optional lift protections tabs can be provided at locations about the upper spacer ring, in position to be covered by paving material to supplement the holding of the assembly in place.