US4334519A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable heater for generating and circulating heat in wearing apparel
Assignee: Individual
•
Filing: 1980-09-15
•
Granted: 1982-06-15
•
Expires: 2000-09-15
Abstract
Abstract A portable heater for generating and circulating heat in wearing apparel. The heater consists of a compact insulated case having a cavity therein which is adapted to receive a chemical heat cartridge which gives off heat through an exothermic chemical reaction when an activator or catalyst is added to the chemical content of the cartridge. A liquid reservoir is positioned in the case for radiant heat transfer from the chemical heat cartridge. A flexible liquid conduit has opposite ends thereof connected for circulation of the heated liquid from the reservoir in a closed circuit, and a pump is provided for circulating the heated liquid through the conduit on demand.
Inventors
- 👤 Stanley Cieslak
- 👤 Leonard K. Cieslak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:37
CPC Classifications
A; A61; A61F; A61F7/00; A61F7/007; A61F7/02; A61F7/03; A41; A41D; A41D2400/00; A41D2400/10; A61F2007/0001; A61F2007/0029; A61F2007/0036; A61F2007/0039; A61F2007/0043; A61F2007/0045
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
172 words
A portable heater for generating and circulating heat in wearing apparel or the like comprising a compact case capable of being carried on a person and having a cavity therein adapted to receive a chemical heat cartridge, a chemical heat cartridge removably received in said cavity, a liquid reservoir in said case positioned for radiant heat transfer from said chemical heat cartridge through an inside heat exchanger wall of said case, a flexible liquid conduit having both ends thereof connected for circulation of the heated liquid from said reservoir through said conduit in a closed circuit, and pump means connected to said conduit to circulate heated liquid from said reservoir through said conduit on demand, said chemical heat cartridge consisting of a sealed container containing a chemical composition which reacts with an activating chemical when mixed therewith to provide an exothermic chemical reaction, and an access on said container and having a closure which is removable to provide access to the interior of said container for the insertion of an activating chemical.
Claim 2
Dependent Claim
172 words
A portable heater for generating and circulating heat in wearing apparel or the like comprising a compact case capable of being carried on a person and having a cavity therein adapted to receive a chemical heat cartridge, a chemical heat cartridge removably received in said cavity, a liquid reservoir in said case positioned for radiant heat transfer from said chemical heat cartridge through an inside heat exchanger wall of said case, a flexible liquid conduit having both ends thereof connected for circulation of the heated liquid from said reservoir through said conduit in a closed circuit, and pump means connected to said conduit to circulate heated liquid from said reservoir through said conduit on demand, said chemical heat cartridge consisting of a sealed container containing a chemical composition which reacts with an activating chemical when mixed therewith to provide an exothermic chemical reaction, and an access on said container and having a closure which is removable to provide access to the interior of said container for the insertion of an activating chemical.
Claim 3
Dependent Claim
38 words
The portable heater of claim 1 including a tube extending inside said container from said access and having apertures therein to assist in distribution of an activating chemical inserted into said access with said chemical composition for reaction.
Claim 4
Dependent Claim
34 words
The portable heater of claim 1 including a pressure relief check valve in said container to vent gas pressure buildup within said container resulting from reaction of said activating chemical with said chemical composition.
References Cited (Backward Citations)
US518579A
Cited
US912527A
Cited
US1199914A
Cited
DE936887C
Cited
US2648325A
Cited
US3000616A
Cited
US3737620A
Cited
US3744053A
Cited
US3670716A
Cited
US3688762A
Cited
US3951127A
Cited
US3884216A
Cited
US3906926A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-06-14 | 1985-12-14 | 1986-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-14 | 1989-12-14 | 1990-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-14 | 1993-12-14 | 1994-06-15 | $7700.00 | Window Closed / Lapsed |