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. 05, 1994
Filed:
Oct. 16, 1992
John V Beamer, Atlanta, GA (US);
Construction Casting Company, Atlanta, GA (US);
Abstract
A method and apparatus for forming a trench with grates or solid covers comprising an outer shell which is disposed between opposed frame members at a certain position, within a ditch and an inner core that is received within a channel in the shell. The core aids in providing rigidity to the shell while concrete hardens about the outer surface of the shell. After the concrete or other encasing material sets, the core can be removed from the shell which then enables the shell to be more easily displaced from the formed trench. One end of a core can project outwardly from an end of its shell so as to be received within the space formed in the rear of the channel of an abutting shell which, likewise, has its core projecting beyond its front end wall, thereby helping to align the shells within the trench.