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US4215437A Expired / Lapsed US ⏱️ 0.0 years remaining

Helmet-mask for cold weather and/or particulate laden environments

Assignee: Individual
•
Filing: 1979-05-30
•
Granted: 1980-08-05
•
Expires: 1999-05-30
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Abstract

Abstract A face mask comprising a head covering, a sealing means for isolating the head covering from the atmosphere when the head covering is worn, an air outlet and inlet section connected to the head covering and wiper means provided at the head covering. The air outlet and inlet section comprises a hollow joint member having upper and lower ends and an opening at a side section thereof, outer conduit means, one end being rotatably secured to a front lower portion of the head covering, and the other end being secured to the upper end of the joint member, inner conduit means connected at one end to the opening of the joint member and extending within the outer conduit up to the front lower portion of the head covering, a flexible conduit means secured at one end to the lower end of the joint member and having a free end to which filter means is connected, first valve means operatively situated in the joint member so that when the air is inhaled into the head covering, only the first valve means opens, and second valve means operatively situated at a free end of the inner conduit means so that when air is exhaled to the atmosphere, only the second valve means opens.

Inventors

  • 👤 Ti Kao

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-26 19:30
CPC Classifications
A; A42; A42B; A42B3/00; A42B3/04; A42B3/18; A42B3/22; A42B3/26; A62; A62B; A62B18/00; A62B18/04

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 218 words
A face mask comprising a head covering to substantially cover the head of the wearer, said head covering having a transparent window, sealing means secured to said head covering for isolating the inside of said head covering from the atmosphere when said head covering is worn, a hollow joint member having upper and lower ends and an opening at a side section thereof, outer conduit means, one end being rotatably secured to a front lower portion of said head covering and the other end being secured to said upper end of said joint member, inner conduit means connected at one end to said opening of said joint member and extending within said outer conduit up to said front lower portion of said head covering, a flexible conduit means secured at one end to said lower end of said joint member and having a free end to which filter means is connected, first valve means operatively situated in said joint member so that when air is inhaled into said head covering, only said first valve means opens, second valve means operatively situated at a free end of said inner conduit means so that when air is exhaled to the atmosphere, only said second valve means opens, and wiper means secured at a front upper portion of said head covering.
Claim 2
Dependent Claim 218 words
A face mask comprising a head covering to substantially cover the head of the wearer, said head covering having a transparent window, sealing means secured to said head covering for isolating the inside of said head covering from the atmosphere when said head covering is worn, a hollow joint member having upper and lower ends and an opening at a side section thereof, outer conduit means, one end being rotatably secured to a front lower portion of said head covering and the other end being secured to said upper end of said joint member, inner conduit means connected at one end to said opening of said joint member and extending within said outer conduit up to said front lower portion of said head covering, a flexible conduit means secured at one end to said lower end of said joint member and having a free end to which filter means is connected, first valve means operatively situated in said joint member so that when air is inhaled into said head covering, only said first valve means opens, second valve means operatively situated at a free end of said inner conduit means so that when air is exhaled to the atmosphere, only said second valve means opens, and wiper means secured at a front upper portion of said head covering.
Claim 3
Dependent Claim 50 words
A face mask as claimed in claim 1, said wiper means comprising motor means, battery means and inner and outer blades operatively connected to said motor means, whereby when said wiper means is operated, the inside surface of said window as well as the outside surface thereof can be cleared.
Claim 4
Dependent Claim 50 words
A face mask as claimed in claim 1, said sealing means including first fastening means at an upper area thereof to be detachably connected to the neck portion of said head covering and second fastening means at a lower area thereof to be fixed to the neck of the wearer.

References Cited (Backward Citations)

US1691648A Cited
US2377122A Cited
US2642574A Cited
US4021878A Cited
DE2645262A1 Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1983-08-05 1984-02-04 1984-08-05 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1987-08-05 1988-02-04 1988-08-05 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1991-08-05 1992-02-04 1992-08-05 $7700.00 Window Closed / Lapsed

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