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:
Dec. 28, 1999
Filed:
May. 12, 1997
Harold M Bowman, Fairvew Park, OH (US);
Other;
Abstract
A manhole frame assembly for supporting a member that can obstruct an access opening when the level of a construction material around the opening is raised, includes an outer frame member having a support surface and a side wall extending from the support surface. The side wall is constructed and arranged with an upper surface that is substantially flush with an original level of the construction material. An inner frame member can be received on the support surface and includes a surface for supporting a member for obstructing the access opening. The side wall includes an abutment device for preventing upward movement of the inner frame member when the original level of construction material around the outer frame member is raised. A portion of the inner frame member is movable in a direction transverse to a direction of a length of the access opening. Other features of the invention are directed to a method of fastening the inner frame to the outer frame and an apparatus for fastening the obstructing member to a manhole frame structure.