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:
Nov. 26, 2002
Filed:
Aug. 24, 2000
Martin Herman Weik, III, Arlington, VA (US);
Arthur Stephen Weik, Annandale, VA (US);
Other;
Abstract
A door, such as a fire door or a security gate, for blocking a throughway or opening in an exterior or interior wall of a building, such as a doorway or countertop window, has an open position and a closed position. A force, such as gravity, a counter weight or a spring, tends to move the door toward its closed position. In the case of the fire door, a disengageable stop holds the door in its open position. The disengageable stop includes a brake actuator for releasing a brake. An expandable linkage, having a normal length and having an elongate length when an external force is applied thereto, has a first end connected to the brake actuator. A second end of the expandable linkage is connected to a fire condition sensitive device, which releases the second end upon a fire indicative condition. With the fire door, or any other type of door, a DC generator is connected to the door and produces power as the door moves from its open position to its closed position. A DC motor is also connected to the door and has an ability to move the door from its closed position to its open position. A first power terminal is connected to the motor, and adapted to receive a second terminal of a portable, rechargeable DC battery.