US3875957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxygen-air diluter device
Assignee: ZMP ACQUISITION Corp
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Filing: 1972-09-19
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Granted: 1975-04-08
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Expires: 1992-09-19
Abstract
Abstract An oxygen-air diluter device having three operational modes, namely, normal dilution, 100 percent oxygen and pressure breathing, includes a chamber divided by a differential pressure operated diaphragm into an outlet pressure sensing portion and an operating pressure sensing portion. A main oxygen supply valve is responsive to movement of the diaphragm and movable between oxygen regulating positions. Valve means control feed of operating pressure to the chamber and connection of the chamber to exhaust. The valve means are actuated by manual means and automatic means in response to ambient pressure and oxygen supply pressure actuatable regardless of altitude.
Inventors
- 👤 Herbert F Veit
- 👤 Robert M Hamilton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:15
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/10; A61M16/12; Y; Y10; Y10S; Y10S137/00; Y10S137/908; Y10T; Y10T137/00; Y10T137/1842; Y10T137/1939; Y10T137/2012; Y10T137/7722; Y10T137/7758; Y10T137/7762; Y10T137/7764; Y10T137/7766; Y10T137/7781; Y10T137/7782
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
113 words
An oxygen-air diluter device for breathing apparatus comprising: a casing having an oxygen inlet adapted to be connected to an oxygen source, an ambient air inlet, and an outlet adapted to be connected to the breathing apparatus, first and second conduit means in said casing connecting said oxygen inlet and said ambient air inlet, respectively, to said outlet, chamber means in said casing, a differential pressure operated diaphragm in said chamber means separating the same into a first chamber sensing outlet pressure and a second chamber sensing an operating pressure, oxygen regulating means in said first conduit including main valve means responsive to movement of said diaphragm and movable between oxygen regulating positions,
Claim 2
Dependent Claim
113 words
An oxygen-air diluter device for breathing apparatus comprising: a casing having an oxygen inlet adapted to be connected to an oxygen source, an ambient air inlet, and an outlet adapted to be connected to the breathing apparatus, first and second conduit means in said casing connecting said oxygen inlet and said ambient air inlet, respectively, to said outlet, chamber means in said casing, a differential pressure operated diaphragm in said chamber means separating the same into a first chamber sensing outlet pressure and a second chamber sensing an operating pressure, oxygen regulating means in said first conduit including main valve means responsive to movement of said diaphragm and movable between oxygen regulating positions,
Claim 3
Dependent Claim
32 words
The oxygen-air diluter device according to claim 1 further comprising manual means for selectively opening said first valve means and automatic means responsive to ambient pressure for opening said first valve means.
Claim 4
Dependent Claim
26 words
The oxygen-air diluter device according to claim 2 wherein said automatic means includes aneroid means for progressively opening said first valve means with decreasing ambient pressure.
Claim 5
Dependent Claim
36 words
The oxygen-air diluter device according to claim 1 further comprising ambient valve means for controlling flow of ambient air through said ambient air inlet, said ambient valve means being responsive to both ambient and operating pressure.
Claim 6
Dependent Claim
23 words
The oxygen-air diluter device according to claim 4 further comprising aneroid means for progressively closing said ambient valve means with decreasing ambient pressure.
Claim 7
Dependent Claim
241 words
An oxygen-air diluter device for breathing apparatus comprising: a casing having an oxygen inlet adapted to be connected to an oxygen source, an ambient air inlet, and an outlet adapted to be connected to the breathing apparatus, first and second conduit means in said casing connecting said oxygen inlet and said ambient air inlet, respectively, to said outlet, chamber means in said casing, a differential pressure operated diaphragm in said chamber means separating the same into a first chamber sensing outlet pressure and a second chamber sensing an operating pressure. oxygen regulating means in said first conduit including main valve means responsive to movement of said diaphragm and movable between oxygen-regulating positions, means disposed in said casing and controlling the operating pressure in said second chamber to affect operation of said differential pressure operated diaphragm, said means controlling the operating pressure including third conduit means connecting said oxygen inlet with said second chamber, first valve means disposed in said third conduit means and operable to control communication between said second chamber and said oxygen inlet and second valve means responsive to said first valve means to vent said second chamber to atmosphere when said first valve means is closed. ambient valve means responsive to ambient pressure and operating pressure for controlling flow of ambient air through said ambient air inlet, and piston means for closing said ambient valve means in response to a decrease in operating pressure to a predetermined level.
Claim 8
Dependent Claim
241 words
An oxygen-air diluter device for breathing apparatus comprising: a casing having an oxygen inlet adapted to be connected to an oxygen source, an ambient air inlet, and an outlet adapted to be connected to the breathing apparatus, first and second conduit means in said casing connecting said oxygen inlet and said ambient air inlet, respectively, to said outlet, chamber means in said casing, a differential pressure operated diaphragm in said chamber means separating the same into a first chamber sensing outlet pressure and a second chamber sensing an operating pressure. oxygen regulating means in said first conduit including main valve means responsive to movement of said diaphragm and movable between oxygen-regulating positions, means disposed in said casing and controlling the operating pressure in said second chamber to affect operation of said differential pressure operated diaphragm, said means controlling the operating pressure including third conduit means connecting said oxygen inlet with said second chamber, first valve means disposed in said third conduit means and operable to control communication between said second chamber and said oxygen inlet and second valve means responsive to said first valve means to vent said second chamber to atmosphere when said first valve means is closed. ambient valve means responsive to ambient pressure and operating pressure for controlling flow of ambient air through said ambient air inlet, and piston means for closing said ambient valve means in response to a decrease in operating pressure to a predetermined level.
Claim 9
Dependent Claim
235 words
An oxygen-air diluter device for breathing apparatus comprising: a casing having an oxygen inlet adapted to be connected to an oxygen source, an ambient air inlet, and an outlet adapted to be connected to the breathing apparatus, first and second conduit means in said casing connecting said oxygen inlet and said ambient air inlet, respectively, to said outlet, chamber means in said casing, a differential pressure operated diaphragm in said chamber means separating the same into a first chamber sensing outlet pressure and a second chamber sensing an operating pressure, oxygen regulating means in said first conduit including main valve means responsive to movement of said diaphragm and movable between oxygen-regulating positions, means disposed in said casing and controlling the operating pressure in said second chamber to affect operation of said differential pressure operated diaphragm, said means controlling the operating pressure including third conduit means connecting said oxygen inlet with said second chamber, first valve means disposed in said third conduit means and operable to control communication between said second chamber and said oxygen inlet and second valve means responsive to said first valve means to vent said second chamber to atmosphere when said first valve means is closed, ambient valve means responsive to ambient pressure and operating pressure for controlling flow of ambient air through said ambient air inlet, and means for opening said first valve means upon closure of said ambient valve means.
Claim 10
Dependent Claim
235 words
An oxygen-air diluter device for breathing apparatus comprising: a casing having an oxygen inlet adapted to be connected to an oxygen source, an ambient air inlet, and an outlet adapted to be connected to the breathing apparatus, first and second conduit means in said casing connecting said oxygen inlet and said ambient air inlet, respectively, to said outlet, chamber means in said casing, a differential pressure operated diaphragm in said chamber means separating the same into a first chamber sensing outlet pressure and a second chamber sensing an operating pressure, oxygen regulating means in said first conduit including main valve means responsive to movement of said diaphragm and movable between oxygen-regulating positions, means disposed in said casing and controlling the operating pressure in said second chamber to affect operation of said differential pressure operated diaphragm, said means controlling the operating pressure including third conduit means connecting said oxygen inlet with said second chamber, first valve means disposed in said third conduit means and operable to control communication between said second chamber and said oxygen inlet and second valve means responsive to said first valve means to vent said second chamber to atmosphere when said first valve means is closed, ambient valve means responsive to ambient pressure and operating pressure for controlling flow of ambient air through said ambient air inlet, and means for opening said first valve means upon closure of said ambient valve means.
Claim 11
Dependent Claim
241 words
An oxygen-air diluter device for breathing apparatus comprising: a casing having an oxygen inlet adapted to be connected to an oxygen source, an ambient air inlet, and an outlet adapted to be connected to the breathing apparatus, first and second conduit means in said casing connecting said oxygen inlet and said ambient air inlet, respectively, to said outlet, chamber means in said casing, a differential pressure operated diaphragm in said chamber means separating the same into a first chamber sensing outlet pressure and a second chamber sensing an operating pressure, oxygen regulating means in said first conduit including main valve means responsive to movement of said diaphragm and movable between oxygen-regulating positions, means disposed in said casing and controlling the operating pressure in said second chamber to affect operation of said differential pressure operated diaphragm, said means controlling the operating pressure including third conduit means connecting said oxygen inlet with said second chamber, first valve means disposed in said third conduit means and operable to control communication between said second chamber and said oxygen inlet and second valve means responsive to said first valve means to vent said second chamber to atmosphere when said first valve means is closed, check valve means responsive to operating pressure in said second chamber for exhausting said second chamber to atmosphere when the operating pressure exceeds a predetermined pressure, and aneroid means for progressively loading said check valve means against opening as ambient pressure decreases.
Claim 12
Dependent Claim
241 words
An oxygen-air diluter device for breathing apparatus comprising: a casing having an oxygen inlet adapted to be connected to an oxygen source, an ambient air inlet, and an outlet adapted to be connected to the breathing apparatus, first and second conduit means in said casing connecting said oxygen inlet and said ambient air inlet, respectively, to said outlet, chamber means in said casing, a differential pressure operated diaphragm in said chamber means separating the same into a first chamber sensing outlet pressure and a second chamber sensing an operating pressure, oxygen regulating means in said first conduit including main valve means responsive to movement of said diaphragm and movable between oxygen-regulating positions, means disposed in said casing and controlling the operating pressure in said second chamber to affect operation of said differential pressure operated diaphragm, said means controlling the operating pressure including third conduit means connecting said oxygen inlet with said second chamber, first valve means disposed in said third conduit means and operable to control communication between said second chamber and said oxygen inlet and second valve means responsive to said first valve means to vent said second chamber to atmosphere when said first valve means is closed, check valve means responsive to operating pressure in said second chamber for exhausting said second chamber to atmosphere when the operating pressure exceeds a predetermined pressure, and aneroid means for progressively loading said check valve means against opening as ambient pressure decreases.
References Cited (Backward Citations)
US3474812A
Cited
US3509895A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |