Patent US2255046A successfully refreshed from Google Patents.
Patent US3814094A successfully refreshed from Google Patents.
US3814094A
Expired / Lapsed
US
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Low profile cold weather respirator
Assignee: GENTEX Corp A CORP OF DE
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Filing: 1972-04-03
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Granted: 1974-06-04
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Expires: 1992-04-03
Abstract
Abstract A low profile cold weather respirator in which a body of heat conductive foraminous material adapted to be supported over either the nose or mouth or both of the wearer is encased in an envelope adapted to be held on the wearer''s head by a strap or the like and is adapted to form a seal with the wearer''s face so that inhaled air is drawn into the cup through the envelope and into heat exchange relationship with the heat conductive material as it enters the space enclosed by the respirator and so that exhaled breath passes outwardly through the heat conductive material.
Inventors
- 👤 Angelis A De
- 👤 A Laliberte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:01
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/10; A61M16/1045
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
228 words
A cold weather respirator for assisting a wearer in breathing in a cold atmosphere including in combination, a foraminous body of thermally conductive material, said body having a cup-like configuration providing a central portion and a peripheral portion, said body adapted to extend over and to cover the nose and mouth of a wearer when said respirator is in position on the wearer''s head, an envelope covering said body, said envelope comprising an inner panel conforming to the shape of the inside of said body and an outer panel conforming to the shape of the outside of said body, one of said panels being bidirectionally pervious to the passage of air over the peripheral portion of said body and impervious to the passage of air over the central portion of said body, the other of said panels being bidirectionally pervious to the passage of air over the central portion of said body and impervious to the passage of air over the peripheral portion of said body to cause inhaled air to travel in heat exchange relationship with said body along a path between said pervious portions and to cause exhaled breath to travel in heat exchange relationship with saId body along a path between said pervious portions, and means for holding said body on the wearer''s head with the body covering the nose and mouth of the wearer.
Claim 2
Dependent Claim
228 words
A cold weather respirator for assisting a wearer in breathing in a cold atmosphere including in combination, a foraminous body of thermally conductive material, said body having a cup-like configuration providing a central portion and a peripheral portion, said body adapted to extend over and to cover the nose and mouth of a wearer when said respirator is in position on the wearer''s head, an envelope covering said body, said envelope comprising an inner panel conforming to the shape of the inside of said body and an outer panel conforming to the shape of the outside of said body, one of said panels being bidirectionally pervious to the passage of air over the peripheral portion of said body and impervious to the passage of air over the central portion of said body, the other of said panels being bidirectionally pervious to the passage of air over the central portion of said body and impervious to the passage of air over the peripheral portion of said body to cause inhaled air to travel in heat exchange relationship with said body along a path between said pervious portions and to cause exhaled breath to travel in heat exchange relationship with saId body along a path between said pervious portions, and means for holding said body on the wearer''s head with the body covering the nose and mouth of the wearer.
Claim 3
Dependent Claim
17 words
A cold weather respirator as in claim 1 in which said thermally conductive material is metal screening.
Claim 4
Dependent Claim
54 words
A cold weather respirator as in claim 1 in which said panels comprise foam rubber sheets extending over the inner and outer surfaces of said body, said one panel comprising a piece of air-impervious material extending over the central portion thereof, said other panel comprising an air-impervious strip extending around the peripheral portion thereof.
Claim 5
Dependent Claim
42 words
A cold weather respirator as in claim 1 in which said panels comprise relatively rigid inner and outer shells of air-impervious material, said one panel being perforated in the central portion thereof; said other panel being perforated in the peripheral portion thereof.
References Cited (Backward Citations)
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Cited
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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) | 1977-06-03 | 1977-12-03 | 1978-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-03 | 1981-12-03 | 1982-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-03 | 1985-12-03 | 1986-06-04 | $7700.00 | Window Closed / Lapsed |