Device for use in the thawing of frozen door locks
First Claim
1. A device for thawing a frozen door lock having a keyhole comprising:
- a tubular member of heat insulating material;
plug support means in and adjacent to one end of said tubular member;
plug means at said one end of said tubular member extending outwardly from said plug support means and having a shape to facilitate insertion thereof into the keyhole of the door lock; and
means for guiding air blown into the other end of said tubular member onto the door lock so that heat from said air is conducted through the door lock to thaw any frozen matter therein comprising said plug support means being shaped to provide axial openings at both sides of said plug means for the passage of air therethrough.
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Accused Products
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.
18 Citations
18 Claims
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1. A device for thawing a frozen door lock having a keyhole comprising:
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a tubular member of heat insulating material; plug support means in and adjacent to one end of said tubular member; plug means at said one end of said tubular member extending outwardly from said plug support means and having a shape to facilitate insertion thereof into the keyhole of the door lock; and means for guiding air blown into the other end of said tubular member onto the door lock so that heat from said air is conducted through the door lock to thaw any frozen matter therein comprising said plug support means being shaped to provide axial openings at both sides of said plug means for the passage of air therethrough. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification