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:
Mar. 11, 2008
Filed:
May. 24, 2006
Jeremy I. Johnson, East Jordan, MI (US);
Lee M. Veldboom, East Jordan, MI (US);
Scott B. Beal, East Jordan, MI (US);
Herbert Carl Barnum, East Jordan, MI (US);
William R. Austin, Ellsworth, MI (US);
James F. Malpass, East Jordan, MI (US);
Todd C. Loviska, East Jordan, MI (US);
Brian J. Rachwitz, East Jordan, MI (US);
Rex A. Garringer, Ardmore, OK (US);
John H. Snyder, Boyne City, MI (US);
Jeremy I. Johnson, East Jordan, MI (US);
Lee M. Veldboom, East Jordan, MI (US);
Scott B. Beal, East Jordan, MI (US);
Herbert Carl Barnum, East Jordan, MI (US);
William R. Austin, Ellsworth, MI (US);
James F. Malpass, East Jordan, MI (US);
Todd C. Loviska, East Jordan, MI (US);
Brian J. Rachwitz, East Jordan, MI (US);
Rex A. Garringer, Ardmore, OK (US);
John H. Snyder, Boyne City, MI (US);
East Jordan Iron Works, Inc., East Jordan, MI (US);
Abstract
A lift-assisted manhole cover assembly with a flush surface and external pivot shaft. The cover includes a mounting tab that extends beyond the general periphery of the cover. The mounting tab may be connected to a shaft that is threadedly engaged with the frame. A spring may be mounted between the frame and the mounting tab, for example, in a sleeve, to provide a mechanical assist in lifting the cover. The sleeve may be disposed outside the manhole opening where it does not block access to the manhole opening.