Heat pack with expansion capability
US6640801B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 29, 2001 |
| Grant date | Nov 4, 2003 |
| Priority date | — |
| Expiry date | Aug 29, 2021 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2007/0292
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A disposable heating device is disclosed that includes a container having a first zone, a second zone and a third zone. A fuel is contained within the first zone and an oxidizing agent contained within the second zone. A first frangible separator disposed between the first zone and the second zone. The first frangible separator is manually operable to provide communication between the first zone and the second zone thereby defining a reaction zone. A second frangible separator is responsive to an exothermic chemical reaction within the reaction chamber. The second frangible separator is operable to provide communication between the reaction chamber and the third zone. Communication between the first zone and the second zone allows mixing of the fuel and the oxidizing agent to initiate an exothermic chemical reaction and an environmental parameter associated with the exothermic chemical reaction operates the second frangible separator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.