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US 5,205,278 AGranted
Chemical bag warmer
OwnerChing-Chuan Wanginventor
Life of this patent
Estimating the term…
Abstract
An improvement of a chemical bag warmer, which comprises a soft bag filled with a sodium acetate solution, and mounted therein with a triggering member; the triggering member is a disc-shaped member, of which the center portion is a cross-shaped part extended to the edge thereof to divide the center portion into four sectors; each sector has a plurality of fragmental concentrie circles to form into a rugged surface, the rugged surface can facilitate the triggering member to bend and vibrate so as to generate a better oscillation wave effect.
Claims2
A chemical bag warmer comprising:
- a plastic bag sealed completely;
- a sodium acetate solution being filled in said sealed bag, said sodium acetate solution having a molality ranging from 8 m to 24 m;
- a triggering member disposed in said sodium acetate solution, said triggering member being adapted to generate an oscillation wave when a pressure is applied thereupon causing said triggering member to bend;
- said triggering member being a disc-shaped member made of a flexible metal piece, said triggering member being characterized by having a flat outer circular portion, a flat center portion, and a rugged middle portion therebetween, said middle portion comprising a plurality of segmented and rugged concentric annuluses separated by a plurality of channel-shaped flat surfaces extending from said center portion to said outer circular portion;
- said triggering member is adapted to vibrate and generate an oscillation wave when a pressure is applied thereupon, thereby causing said sodium acetate solution to crystallize and providing a warming effect through the dissipation of heat due to such crystallization.
2 more elements
Dependencies are inferred from the claim text.