Patent US3604416A successfully refreshed from Google Patents.
US3604416A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Emergency oxygen system
Assignee: Universal Oil Products Co
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Filing: 1969-04-28
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Granted: 1971-09-14
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Expires: 1989-04-28
Abstract
Abstract A lightweight, portable oxygen supply system embodying a facebreathing mask and eye protection hood, a foldable breather bag, flexible tubing for connecting the mask and breather bag, flexible tubing for connecting the mask and breather bag, a gaseous oxygen supply pressure container (with special adsorbent therein to increase oxygen storage capacity) which connects through special valve-regulator means to the breather bag, and a gas permeable bed of carbon dioxide absorbent provided between the mask and the breather bag, but preferably adjaCent or partially within the latter, so as to preclude carbon dioxide buildup in the system.
Inventors
- 👤 Joseph A Petrahai
- 👤 James E Bellemare
- 👤 August J Hildenbrandt Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:33
CPC Classifications
A; A62; A62B; A62B7/00; A62B7/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
234 words
In a portable oxygen supply system for an individual, a foldable face breathing mask, a foldable breather bag, a lightweight gaseous oxygen supply container having regulator means connecting through said breather bag said container having disposed therein a large surface area oxygen absorbent material having the capability of absorbing oxygen that can be contained in a given volume at 400 p.s.i.g., a carbon dioxide absorbent material disposed as a bed between the mask and breather bag whereby a buildup of carbon dioxide is precluded in said system, oxygen flow regulator means disposed adjacent said supply container provided with adjustable metering orifice means thereby to provide substantially constant pressure discharge flow from said supply container, said regulator means including oxygen exit means, a movable valve plug means closure for said exit means, a removable pull-pin means disposed to exert thrust and bear against said valve plug closure means to maintain said plug closure means in closed position to preclude oxygen flow when said system is in storage, a carrying strap for said system, a cord means interconnecting said strap and said pin means, whereby upon pulling of said strap to unfold said breather mask and breather bag said pin means is removed from its position against said plug closure means to thereby positively remove said plug means from said exit means to thereby provide continuous oxygen flow into said breather bag and said supply system
Claim 2
Dependent Claim
234 words
In a portable oxygen supply system for an individual, a foldable face breathing mask, a foldable breather bag, a lightweight gaseous oxygen supply container having regulator means connecting through said breather bag said container having disposed therein a large surface area oxygen absorbent material having the capability of absorbing oxygen that can be contained in a given volume at 400 p.s.i.g., a carbon dioxide absorbent material disposed as a bed between the mask and breather bag whereby a buildup of carbon dioxide is precluded in said system, oxygen flow regulator means disposed adjacent said supply container provided with adjustable metering orifice means thereby to provide substantially constant pressure discharge flow from said supply container, said regulator means including oxygen exit means, a movable valve plug means closure for said exit means, a removable pull-pin means disposed to exert thrust and bear against said valve plug closure means to maintain said plug closure means in closed position to preclude oxygen flow when said system is in storage, a carrying strap for said system, a cord means interconnecting said strap and said pin means, whereby upon pulling of said strap to unfold said breather mask and breather bag said pin means is removed from its position against said plug closure means to thereby positively remove said plug means from said exit means to thereby provide continuous oxygen flow into said breather bag and said supply system
Claim 3
Dependent Claim
41 words
The portable oxygen supply system of claim 1 further characterized in that said breather bag is of a multiple layer flexible material comprising an inner layer of airtight nylon-Mylar construction and there is an outer protective cover layer of nylon-polyurethane construction.
Claim 4
Dependent Claim
24 words
The portable oxygen supply system of claim 1 further characterized in that the carbon dioxide absorbent material comprises lithium hydroxide in a particulated form.
Claim 5
Dependent Claim
47 words
The portable oxygen supply system of claim 1 further characterized in that said carbon dioxide absorbent material is in a confined bed maintained adjacent the breather bag and has inlet and outlet means with fine screen mesh precluding the passage of dust and particulates from said bed.
Claim 6
Dependent Claim
51 words
The portable oxygen supply system of claim 1 further characterized in that the oxygen supply container is provided with a visually readable pressure indicator means connected with the interior of said container whereby there may be a ready observation of the oxygen pressure in the container during storage of the system.
Claim 7
Dependent Claim
72 words
The portable oxygen supply system of claim 1 further characterized in that a small storage box is provided for said system, a pressure indicator is provided within said box, and the end portion of said box is provided with a window means at an area to be in alignment with said pressure indicator means on said oxygen cylinder when the latter is packed and stowed in said box with the entire system.
Claim 8
Dependent Claim
75 words
The portable oxygen supply system of claim 1 further characterized in that said face-breathing mask is provided as an inner portion to an overall face and head hood means which is adapted to provide a relatively tight seal around the user''s face and, in addition, said hood is provided with a transparent eye shield whereby the combination hood and breathing mask will be of particular advantage in utilizing the portable system for fire fighting operations.
References Cited (Backward Citations)
US1608155A
Cited
US2586670A
Cited
US2881758A
Cited
US3390676A
Cited
US3502075A
Cited
US3500827A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-13 | 1975-03-15 | 1975-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-13 | 1979-03-15 | 1979-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-13 | 1983-03-15 | 1983-09-14 | $7700.00 | Window Closed / Lapsed |