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. 25, 1980
Filed:
Dec. 16, 1977
Lawrence F Biebuyck, Dallas, TX (US);
Howmet Corporation, New York, NY (US);
Abstract
Disclosed is a security astragal for double door assemblies which includes a gear-toothed rod rotatably mounted in the meeting edge of one of the doors, and a rod-engaging blade mounted on the meeting edge of the other door. Both the rod and the blade preferably extend for the full height of the door. When the doors are swung relative to each other, the blade engages the teeth on the rod and rotates the rod sufficiently to enable the blade to move partly or fully past the rod. When the doors are in closed position, the blade and rod are in gear-like interengagement, making it impossible to insert a coat hanger or other jimmying tool between the two doors for manipulating the latch mechanism on the inside of the doors.