US3670716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-heated protective garment
Assignee: United States Department of the Navy
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Filing: 1970-12-21
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Granted: 1972-06-20
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Expires: 1990-12-21
Abstract
Abstract A heat-augmentable outside garment for protecting personnel from extended low temperature exposure. A network of flexible tubing lined within the outside garment completes a loop between the one ends of two coils within chambers of a portable heater unit containing a chemical exothermic composition. The other ends of the coils are connected respectively to an upper and a lower chamber of a portable manual double-action pump. The upper and the lower chambers of the pump, the coils, and the tubing are filled by a heat transfer fluid. Reciprocation of the pump alternates fluid flow to and from the two coils and the tubing resulting in heat transfer from the exothermic reaction of a chemical composition to the garment.
Inventors
- 👤 John J Esposito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:00
CPC Classifications
B; B63; B63C; B63C11/00; B63C11/02; B63C11/04; B63C11/28
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
183 words
A portable self-contained personal heat augmenting system for providing protection to a wearer in a low temperature environment comprising, in combination: an outer garment enclosing the wearer; heat distributing means disposed within the garment for distributing heat therein; heat generating means supportable by a wearer of said garment and cooperating with said garment, said heat generating means connected across said heat distributing means for providing a portable heat source; heat transfer fluid operatively associated with said heat generating means and said heat distributing means; a reciprocating dual action pump means supportable by a wearer of said garment and cooperating with said garment, said pump means cooperating with said heat generating means for moving, during each stroke thereof, a portion of the heat transfer fluid from said heat generating means through said heat distributing means, while simultaneously moving another portion of the fluid from the heat distributing means through the heat generating means; and the thermal mass and resistance properties of the materials forming said garment being selected such that temperatures in said garment are maintained within the tolerance limits of the human body.
Claim 2
Dependent Claim
183 words
A portable self-contained personal heat augmenting system for providing protection to a wearer in a low temperature environment comprising, in combination: an outer garment enclosing the wearer; heat distributing means disposed within the garment for distributing heat therein; heat generating means supportable by a wearer of said garment and cooperating with said garment, said heat generating means connected across said heat distributing means for providing a portable heat source; heat transfer fluid operatively associated with said heat generating means and said heat distributing means; a reciprocating dual action pump means supportable by a wearer of said garment and cooperating with said garment, said pump means cooperating with said heat generating means for moving, during each stroke thereof, a portion of the heat transfer fluid from said heat generating means through said heat distributing means, while simultaneously moving another portion of the fluid from the heat distributing means through the heat generating means; and the thermal mass and resistance properties of the materials forming said garment being selected such that temperatures in said garment are maintained within the tolerance limits of the human body.
Claim 3
Dependent Claim
22 words
A personal heat augmenting system according to claim 1, in which said dual action pump means comprises a manually operated valveless pump.
Claim 4
Dependent Claim
66 words
A personal heat augmenting system according to claim 2, in which said heat generating means includes a heat pack containing exothermic reagents, two heat transmissive conduit means disposed within said heat pack the distal ends thereof extending out of said heat pack, and supply passageway means formed in said heat pack for supplying liquid reactant into engagement with said reagents whereby said exothermic reaction is activated.
Claim 5
Dependent Claim
45 words
A personal heat augmenting system according to claim 3, in which said heat transmissive conduit means each includes a conductive metallic coil formed to contain a volume of heat exchange fluid approximately equal to the volume contained within said heat distributing means of said garment.
Claim 6
Dependent Claim
51 words
A personal heat augmenting system according to claim 4, in which said heat distributing means includes a flexible tubing network disposed within said garment in parallel loop sections joined in common at the corresponding ends thereof and operatively connected at the ends thereof between the respective one ends of said coils.
Claim 7
Dependent Claim
63 words
A personal heat augmenting system according to claim 5, in which said pump means includes a housing, a piston slidably contained in sealing engagement within said housing, actuation means slidably extending from said housing attached at one end thereof to said piston, passageways one at each end of the housing and hoses operatively connecting said passageways and respective other ends of said coils.
Claim 8
Dependent Claim
37 words
A personal heat augmenting system according to claim 6, in which said heat pack includes a thermally insulating dividing wall disposed between said coils, whereby the heat balance of each coil is partly separated from the other.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |