US 12,338,668 B2
Self-closing residential fire hinge apparatus
Bryon Smith, Dalton Gardens, ID (US)
Filed by Bryon Smith, Dalton Gardens, ID (US)
Filed on Aug. 3, 2023, as Appl. No. 18/229,999.
Prior Publication US 2025/0043609 A1, Feb. 6, 2025
Int. Cl. E05D 11/00 (2006.01); E05D 3/02 (2006.01); E05F 1/00 (2006.01); E05F 1/12 (2006.01)
CPC E05F 1/006 (2013.01) [E05D 3/02 (2013.01); E05F 1/1207 (2013.01); E05Y 2201/484 (2013.01); E05Y 2900/132 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A fire-actuated release mechanism for a door, the fire-actuated release mechanism comprising:
a self-closing door hinge having a spring-actuated closure mechanism, the spring-actuated closure mechanism including:
a spring being pre-tensioned in an open position; and
a coating covering the spring, the covering being a solid material whereby the coating retains the spring in the open position, the coating having a melting point less than a melting point of the spring whereby the spring is released to a closed position when the coating is heated until the coating becomes malleable allowing the release of the spring into the closed position.