US3767161A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diaphragm valve logic element
Assignee: Bendix Corp
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Filing: 1971-08-16
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Granted: 1973-10-23
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Expires: 1991-08-16
Abstract
Abstract A fluidic moving part logic element is disclosed comprised of a diaphragm and housing defining a control pressure chamber on one side of the diaphragm and a supply pressure chamber on the other side with movement of the diaphragm in response to a pressure difference thereacross controlling communication of the supply pressure with an output passage. The supply fluid passes through a narrowed section defined in part by the diaphragm itself in reaching the output or a vent to create an average pressure on the supply pressure side of the diaphragm that is lower than the supply and the output passage pressure as a result of the Bernoulli effect to enable a control pressure of lower magnitude than the supply or output pressure to move the diaphragm against the supply pressure to control switching.
Inventors
- 👤 A Blatter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:37
CPC Classifications
F; F15; F15C; F15C3/00; F15C3/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
230 words
A diaphragm valve comprising: a housing; a diaphragm disposed in said housing to define a pair of chambers on either side of said diaphragm; means for directing a control fluid under pressure into one of said chambers; an outlet; means causing said diaphragm to assume a first position in which said inlet means and said outlet are in communication in response to a greater fluid pressure acting on the other chamber side than the one chamber side of said diaphragm and causing said diaphragm to move to a second position in which said inlet means and outlet are not in communication whenever a lesser fluid pressure is acting on said chamber other side than said one chamber side of said diaphragm; flow passage means providing said communication between said inlet means and said outlet in said first diaphragm position defined in part by said diaphragm and including a region of reduced cross-sectional area relative said inlet means, said reduced cross-sectional area region producing a substantially reduced static pressure acting on said diaphragm sufficient during fluid flow through said flow passage means to create an average pressure acting on said diaphragm less than the pressures in said other chamber at said inlet and outlet, whereby a control pressure of lesser magnitude than said supply pressure can cause said diaphragm to assume said second position without excessive pressure losses at said outlet.
Claim 2
Dependent Claim
230 words
A diaphragm valve comprising: a housing; a diaphragm disposed in said housing to define a pair of chambers on either side of said diaphragm; means for directing a control fluid under pressure into one of said chambers; an outlet; means causing said diaphragm to assume a first position in which said inlet means and said outlet are in communication in response to a greater fluid pressure acting on the other chamber side than the one chamber side of said diaphragm and causing said diaphragm to move to a second position in which said inlet means and outlet are not in communication whenever a lesser fluid pressure is acting on said chamber other side than said one chamber side of said diaphragm; flow passage means providing said communication between said inlet means and said outlet in said first diaphragm position defined in part by said diaphragm and including a region of reduced cross-sectional area relative said inlet means, said reduced cross-sectional area region producing a substantially reduced static pressure acting on said diaphragm sufficient during fluid flow through said flow passage means to create an average pressure acting on said diaphragm less than the pressures in said other chamber at said inlet and outlet, whereby a control pressure of lesser magnitude than said supply pressure can cause said diaphragm to assume said second position without excessive pressure losses at said outlet.
Claim 3
Dependent Claim
27 words
The vAlve of claim 1 further including means for creating supply pressure flow when said outlet is blocked including a vent passage communicating with said other chamber.
Claim 4
Dependent Claim
31 words
The valve of claim 1 wherein said region of reduced cross-sectional area flow passage gradually increases in cross-sectional area downstream of the direction of flow therethrough, whereby flow losses are minimized.
Claim 5
Dependent Claim
35 words
The valve of claim 3 wherein said flow passage means further includes a raised boss having a central supply passage therein and disposed normal and adjacent to said diaphragm to define said flow passage therebetween.
Claim 6
Dependent Claim
47 words
The valve of claim 1 wherein said diaphragm is positively restrained from moving past a predetermined point toward said other chamber side in the vicinity of said reduced cross-sectional area flow passage, whereby said reduced cross-sectional area is maintained against fluid pressures exerted by said supply fluid.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |