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:
Oct. 25, 1977
Filed:
Dec. 06, 1976
Vernon R Schimmel, Arlington Heights, IL (US);
Symons Corporation, Des Plaines, IL (US);
Abstract
An inside articulated and collapsible form adapted for use in the formation of a rectangular concrete corewall and having at its corners novel three-way hinge assemblies including main hinge leaves which are movable between right angular positions wherein the four form sides with which they are associated assume extended positions wherein their panel facings conform to the outline of the inside face of the corewall to be formed by pouring wet concrete around the form, and acute angle positions wherein such form sides assume collapsed positions which are inwardly removed from such outline while the hinge leaves constitute rub rails which guide the collapsed form axially along and within the surrounding hardened concrete corewall during removal of the form the formed corewall. Secondary hinge leaves at the outer or distal ends of the main hinge leaves afford attachment facilities for connecting the main hinge leaves to the form sides while locking flanges on the main hinge leaves are capable of being removably bolted to the secondaryhinge leaves in order to maintain the form in its extended condition of use.