US3869871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas and heat protective garment
Assignee: Individual
•
Filing: 1974-04-24
•
Granted: 1975-03-11
•
Expires: 1994-04-24
Abstract
Abstract A gas and heat protective garment comprises a suit provided with pipes for circulation of a cooling medium and a knapsack housing a respiration protecting system and a refrigerating unit including among other components a pneumatic pump and a reservoir with a liquid refrigerant. There is a gas cushion in the refrigerant reservoir, which gas cushion is put in communication with the pneumatic pump through a vapour pipe a portion of which is arranged to extend above the level of the liquid refrigerant in the reservoir and is movably mounted in said reservoir, being adapted to remain in a vertical position when the reservoir changes its attitude. Owing to this constructional arrangement the vapour pipe always extends above the level of the liquid refrigerant when the wearer of the garment inclines, whereby only refrigerant vapour is permitted to pass into the pneumatic pump. This improves the operating dependability of the garment refrigerating unit and increases the range of garment use.
Inventors
- 👤 Alexei Petrovich Rybalko
- 👤 Viktor Vladimirovich Karpekin
- 👤 Nikolai Sidorovich Didenko
- 👤 Ivan Ivanovich Volokhov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:18
CPC Classifications
F; F25; F25D; F25D3/00; F25D3/10; F25D3/107; A; A62; A62B; A62B17/00; A62B17/005
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
183 words
A gas and heat protective garment comprising: a heat insulating cover; a suit provided with pipes for circulation of a cooling medium; a knapsack accommodating a respiration protecting system and a refrigerating unit, said suit and said knapsack being enclosed with said heat insulating cover; said refrigerating unit comprising: a reservoir with a liquid refrigerant contained therein and a heat exchanger, said reservoir and heat exchanger serving the purpose of abstracting heat from said cooling medium circulating in said pipes of said suit, a pneumatic pump actuated by refrigerant vapour, a pipeline connecting said pneumatic pump with a gas cushion in said refrigerant reservoir, a pressure regulator incorporated in said pipeline, a vapour pipe forming a part of said pipeline, a portion of said vapour pipe being arranged to extend above the level of the liquid refrigerant contained in said reservoir, said extending portion of the vapour pipe being movably mounted in the refrigerant reservoir and adapted to remain in a vertical position when said refrigerant reservoir changes its attitude, this constructional arrangement permitting only refrigerant vapour to pass to said pneumatic pump.
Claim 2
Dependent Claim
183 words
A gas and heat protective garment comprising: a heat insulating cover; a suit provided with pipes for circulation of a cooling medium; a knapsack accommodating a respiration protecting system and a refrigerating unit, said suit and said knapsack being enclosed with said heat insulating cover; said refrigerating unit comprising: a reservoir with a liquid refrigerant contained therein and a heat exchanger, said reservoir and heat exchanger serving the purpose of abstracting heat from said cooling medium circulating in said pipes of said suit, a pneumatic pump actuated by refrigerant vapour, a pipeline connecting said pneumatic pump with a gas cushion in said refrigerant reservoir, a pressure regulator incorporated in said pipeline, a vapour pipe forming a part of said pipeline, a portion of said vapour pipe being arranged to extend above the level of the liquid refrigerant contained in said reservoir, said extending portion of the vapour pipe being movably mounted in the refrigerant reservoir and adapted to remain in a vertical position when said refrigerant reservoir changes its attitude, this constructional arrangement permitting only refrigerant vapour to pass to said pneumatic pump.
Claim 3
Dependent Claim
183 words
A gas and heat protective garment comprising: a heat insulating cover; a suit provided with pipes for circulation of a cooling medium; a knapsack accommodating a respiration protecting system and a refrigerating unit, said suit and said knapsack being enclosed with said heat insulating cover; said refrigerating unit comprising: a reservoir with a liquid refrigerant contained therein and a heat exchanger, said reservoir and heat exchanger serving the purpose of abstracting heat from said cooling medium circulating in said pipes of said suit, a pneumatic pump actuated by refrigerant vapour, a pipeline connecting said pneumatic pump with a gas cushion in said refrigerant reservoir, a pressure regulator incorporated in said pipeline, a vapour pipe forming a part of said pipeline, a portion of said vapour pipe being arranged to extend above the level of the liquid refrigerant contained in said reservoir, said extending portion of the vapour pipe being movably mounted in the refrigerant reservoir and adapted to remain in a vertical position when said refrigerant reservoir changes its attitude, this constructional arrangement permitting only refrigerant vapour to pass to said pneumatic pump.
Claim 4
Dependent Claim
183 words
A gas and heat protective garment comprising: a heat insulating cover; a suit provided with pipes for circulation of a cooling medium; a knapsack accommodating a respiration protecting system and a refrigerating unit, said suit and said knapsack being enclosed with said heat insulating cover; said refrigerating unit comprising: a reservoir with a liquid refrigerant contained therein and a heat exchanger, said reservoir and heat exchanger serving the purpose of abstracting heat from said cooling medium circulating in said pipes of said suit, a pneumatic pump actuated by refrigerant vapour, a pipeline connecting said pneumatic pump with a gas cushion in said refrigerant reservoir, a pressure regulator incorporated in said pipeline, a vapour pipe forming a part of said pipeline, a portion of said vapour pipe being arranged to extend above the level of the liquid refrigerant contained in said reservoir, said extending portion of the vapour pipe being movably mounted in the refrigerant reservoir and adapted to remain in a vertical position when said refrigerant reservoir changes its attitude, this constructional arrangement permitting only refrigerant vapour to pass to said pneumatic pump.
Claim 5
Dependent Claim
62 words
A gas and heat protective garment as claimed in claim 1 in which said vapour pipe is connected to said pipeline by means of a flexible hose and is mounted substantially in the middle of said refrigerant reservoir, said vapour pipe being pivoted at this location and adapted to make a pivotal movement by the action of a counterweight mounted opposite Thereto.
Claim 6
Dependent Claim
30 words
A gas and heat protective garment as claimed in claim 2, in which said vapour pipe is mounted in said refrigerant reservoir by means of a ball and socket joint.
Claim 7
Dependent Claim
63 words
A gas and heat protective garment as claimed in claim 1, in which said pressure regulator is provided with a spring-loaded flexible element adapted to be acted upon by refrigerant vapour pressure, said flexible element being located in the pressure regulator housing and mounting a valve adapted for closing said pipeline connecting the pneumatic pump with the gas cushion in the refrigerant reservoir.
Claim 8
Dependent Claim
56 words
A gas and heat protective garment as claimed in claim 4, in which a pressure stabilizer is incorporated in said pipeline between the pressure regulator and the pneumatic pump in order that the pressure of the refrigerant vapour entering the pneumatic pump be maintained constant irrespective of variation of the vapour pressure in the refrigerant reservoir.
Claim 9
Dependent Claim
67 words
A gas and heat protective garment as claimed in claim 5, in which said pneumatic pump comprises a pneumatic pulse generator piped to said pressure stabilizer and includes two spring-loaded diaphragms housed in individual cases, each diaphragm dividing its case into two separate chambers one of which communicates with the pneumatic pulse generator and the other with the pipeline connecting the suit pipes with the heat exchanger.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-10 | 1978-09-09 | 1979-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-10 | 1982-09-09 | 1983-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-10 | 1986-09-09 | 1987-03-11 | $7700.00 | Window Closed / Lapsed |