Device for use in the thawing of frozen door locks

Details Device for use in the thawing of frozen door locks Device for use in the thawing of frozen door locks

1987-03-30

1988-03-22

Yuen, Henry C.

Heating

Inserted emitter type of hollow article interior heater

98 31, 34104, 70423, 70424, 70431, F26B 2100, F24J 300, E05B 1700

Patent

active

047325623

ABSTRACT:
A device for use in thawing frozen car locks comprises a tube (10) of a heat insulating material having a plug support at one end; axial holes through the plug support; a flat, axially projecting plug (13) extending from the plug support designed to be inserted into and to essentially fill the keyhole of the lock; and a raised lip on the plug end formed with a plurality of through-going, radial cuts (15). When the projection is inserted into the keyhole in a frozen lock, and expiration air is blown into the other end of the tube, this air gives off its heat to the outer side of the lock before flowing through the openings without itself penetrating into the lock. The heat, on the other hand, is conducted into the lock and melts ice formed therein.

REFERENCES:
patent: 460291 (1891-09-01), Jung
patent: 2614337 (1952-10-01), Darbo
patent: 3417482 (1968-12-01), Peet
patent: 3691647 (1972-09-01), Snyder et al.
patent: 3805405 (1974-04-01), Ambos
patent: 4058995 (1977-11-01), Greaves
patent: 4090379 (1978-05-01), Lehner

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