US3608574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diaphragm-valve especially for a respiratory-gas supply system
Assignee: Safran Aerosystems SAS
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Filing: 1968-12-09
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Granted: 1971-09-28
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Expires: 1988-12-09
Abstract
Abstract A diaphragm-valve, especially for a respiratory-gas supply system, comprising a flat diaphragm of revolution about an axis, a sealing lip adapted to cooperate with a seating and added to said diaphragm in the vicinity of its periphery, said lip having a substantially conical profile whose vertex is located on said axis on the gas inlet side of said diaphragm, and a bellows element which forms an extension of said flat diaphragm on the side remote from said lip, said bellows element being made integral at one end thereof with said diaphragm and secured in position at the other end thereof by means of an annular flange, said lip having a diameter of contact with said seating which is substantially identical with the effective diameter of said bellows element.
Inventors
- 👤 Raymond Beaussant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:24
CPC Classifications
A; A62; A62B; A62B9/00; A62B9/02; A62B9/022; A62B9/027; A62B18/00; A62B18/08; A62B18/10; F; F16; F16K; F16K15/00; F16K15/02; F16K15/14; F16K15/148; F16K15/1481; F16K17/00; F16K17/02; F16K17/04; F16K17/0413; F16K2200/00; F16K2200/20; F16K2200/202; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2544; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7841; Y10T137/7879; Y10T137/7888; Y10T137/789; Y10T137/7904; Y10T137/7905
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
165 words
A fluid flow control device comprising a hollow casing having an inlet and an outlet; a circular valve seat extending between said inlet and outlet; a membrane disposed in said casing and comprising a flat portion having one Face exposed to said inlet, a bellows portion extending from the other face of the flat portion and fixed with respect to said casing, said bellows portion having an effective diameter substantially equal to the diameter of said valve seat, and a frustoconical lip portion extending from the rim of said flat portion for contacting said valve seat; and means to exert a predetermined pressure against said other face of said flat portion to urge the inner surface of said lip portion against said valve seat and prevent fluid flow through said casing, whereby a fluid introduced into said casing through said inlet of a pressure greater than said predetermined pressure moves said lip portion away from said valve seat to permit fluid flow through said casing.
Claim 2
Dependent Claim
165 words
A fluid flow control device comprising a hollow casing having an inlet and an outlet; a circular valve seat extending between said inlet and outlet; a membrane disposed in said casing and comprising a flat portion having one Face exposed to said inlet, a bellows portion extending from the other face of the flat portion and fixed with respect to said casing, said bellows portion having an effective diameter substantially equal to the diameter of said valve seat, and a frustoconical lip portion extending from the rim of said flat portion for contacting said valve seat; and means to exert a predetermined pressure against said other face of said flat portion to urge the inner surface of said lip portion against said valve seat and prevent fluid flow through said casing, whereby a fluid introduced into said casing through said inlet of a pressure greater than said predetermined pressure moves said lip portion away from said valve seat to permit fluid flow through said casing.
Claim 3
Dependent Claim
41 words
The device of claim 1 wherein said flat portion is provided with a central opening and an annular bead, and further comprising an auxiliary valve adapted to cooperate with said annular bead to control the flow of fluid through said casing.
Claim 4
Dependent Claim
83 words
The device of claim 1 wherein said flat portion is adapted to move relative to said lip portion when the latter is engaging said valve seat in response to a negative pressure occuring at said inlet, and further comprising an actuating member engaging said flat portion and adapted to move therewith in response to said relative movement, and means disposed in said casing and operable in response to movement of said actuating member for controlling the flow of additional fluid through said casing.
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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) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |