Patent US3818510A successfully refreshed from Google Patents.
US3818510A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frost-free protective face and head enclosure
Assignee: Individual
•
Filing: 1972-10-25
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Granted: 1974-06-25
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Expires: 1992-10-25
Abstract
Abstract A frost-free face and head enclosure which is provided with means for use in cold environments and which maintains a substantially frost-free condition for visibility by the wearer. The enclosure is preferably comprised of a generally rigid helmet or head covering means with a face mask means for covering the face of the wearer. The face mask includes a transparent eye covering shield, and an isolating breathing chamber is provided within the confines of the face mask. The breathing chamber has means for effectively receiving ambient air to be breathed by the wearer, and for discharging exhaled air. Means are also provided for substantially continuously passing the ambient air through the discharge means to assist in reducing accumulation of frost.
Inventors
- 👤 D Romann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:09
CPC Classifications
A; A42; A42B; A42B3/00; A42B3/04; A42B3/18; A42B3/22; A42B3/24
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
256 words
Frost-free protective face and head enclosure means comprising, in combination: a. helmet head enclosure means comprising head covering means and providing a face opening for the face of the wearer; b. face mask means including a face shield with a generally transparent eye covering portion, bore means formed within said mask to provide access to ambient air, baffle means disposed within said shield and surrounding said bore means for providing an isolating chamber for separating the nose and mouth of the wearer from the interior of said face mask means; c. check valve means effectively coupled to at least a portion of said bore means to open said isolating chamber to the ambient upon inhaling by the wearer; d. first conduit means having a first port adjacent the inner end and being arranged in communication with said isolating chamber for receiving air exhaled by the wearer with the first conduit means having a conduit portion extending externally of the face mask means and with the opposed outer end defining a second port, and with said second port normally being in communication with the ambient; e. second conduit means associated with said bore means and having one end arranged in communication with said bore means for receiving ambient air with the said second conduit extending internally of said face mask means and with the other end being in commUnication with the interior of said first conduit means at a point closely adjacent said first end for substantially continuous discharging of ambient air into said first conduit means.
Claim 2
Dependent Claim
256 words
Frost-free protective face and head enclosure means comprising, in combination: a. helmet head enclosure means comprising head covering means and providing a face opening for the face of the wearer; b. face mask means including a face shield with a generally transparent eye covering portion, bore means formed within said mask to provide access to ambient air, baffle means disposed within said shield and surrounding said bore means for providing an isolating chamber for separating the nose and mouth of the wearer from the interior of said face mask means; c. check valve means effectively coupled to at least a portion of said bore means to open said isolating chamber to the ambient upon inhaling by the wearer; d. first conduit means having a first port adjacent the inner end and being arranged in communication with said isolating chamber for receiving air exhaled by the wearer with the first conduit means having a conduit portion extending externally of the face mask means and with the opposed outer end defining a second port, and with said second port normally being in communication with the ambient; e. second conduit means associated with said bore means and having one end arranged in communication with said bore means for receiving ambient air with the said second conduit extending internally of said face mask means and with the other end being in commUnication with the interior of said first conduit means at a point closely adjacent said first end for substantially continuous discharging of ambient air into said first conduit means.
Claim 3
Dependent Claim
35 words
The frost-free protective face and head enclosure means as defined in claim 1 being particularly characterized in that a projection element is rigidly secured to the base of the face mask, and protrudes externally thereof.
Claim 4
Dependent Claim
31 words
The frost-free protective face and head enclosure as defined in claim 1 being particularly characterized in that said face mask means is releasably hingedly coupled to said helmet head enclosure means.
Claim 5
Dependent Claim
56 words
The frost-free protective face and head enclosure means as defined in claim 1 being particularly characterized in that a generally compressible means is secured to the inner edges of said baffle means to effectively seal said isolating chamber and the nose and mouth of the wearer from the remaining area of the face of the wearer.
Claim 6
Dependent Claim
26 words
The frost-free protective face and head enclosure means as defined in claim 1 being particularly characterized in that said helmet head enclosure means is substantially rigid.
Claim 7
Dependent Claim
72 words
The frost-free protective face and head enclosure means as defined in claim 1 being particularly characterized in that said second conduit means comprises two individual and distinct conduit elements, and wherein said bore means comprises three spaced apart bores, with said check valve means being arranged to cover one of said bores, and with each of the remaining two bores being in communication with an individual one of said second conduit means.
Claim 8
Dependent Claim
55 words
The frost-free protective face and head enclosure means as defined in claim 1 being particularly characterized in that said first conduit means comprises at least two spaced conduits, and wherein said second conduit means includes two spaced apart conduits with one individual second conduit means being in communication with each of said first conduit means.
Claim 9
Dependent Claim
53 words
The frost-free protective face and head enclosure means as defined in claim 2 being particularly characterized in that said projection is rigidly secured to said face mask means at a point generally along the longitudinal axis thereof, and at a point generally outwardly of the zone occupied by the chin of the wearer.
Claim 10
Dependent Claim
33 words
The frost-free protective face and head enclosure means as defined in claim 1 being particularly characterized in that a portion of the length of said second conduit means passes through said isolation chamber.
References Cited (Backward Citations)
US2344920A
Cited
US2597764A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |