US3771567A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromechanically actuated fluid switch
Assignee: AT&T Inc
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Filing: 1972-07-13
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Granted: 1973-11-13
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Expires: 1992-07-13
Abstract
Abstract An electromechanically actuated fluid switch is disclosed in which the fluid output condition is tristable. The fluid output condition is selected by placing a voltage on a piezoelectric strip which, in turn, controls the position of the switching element. The three distinct fluid output conditions correspond to applied electrical signals of ''''+,'''' ''''-'''' and ''''0.'''' Since the switching function is not performed by the piezoelectric strip, but by a separate switching element, the configuration and surface finish of that element may be selected to provide desired fluid flow properties.
Inventors
- 👤 R Linden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:47
CPC Classifications
F; F15; F15C; F15C3/00; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/2164; Y10T137/218; Y10T137/2202; Y10T137/2213; Y10T137/8593; Y10T137/86493; Y10T137/86847; Y10T137/87249; Y10T137/877; Y10T137/87788
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
243 words
A fluid switch comprising a first nozzle for generating a first fluid jet; a second nozzle for generating a second fluid jet; a switching chamber forming a cavity into which the generated jets flow; a first fluid receiver communicating with the switching chamber to receive the first jet; a second fluid receiver communicating with the switching chamber to receive the second jet; a vent connected to the switching chamber through which fluid exits the switch; a flow diverter located within the switching chamber and selectively movable to three positions, in a first position the diverter isolates the first and second receivers from the generated jets and diverts the jets to exit the switch via the vent, in a second position the diverter isolates the first receiver from the first jet and diverts the first jet to exit the switch via the vent while simultaneously directing the second jet to the second receiver, and in a third position the diverter isolates the second receiver from the second jet and directs the second jet to exit the switch via the vent while simultaneously directing the first jet to the first receiver; and means responsive to applied electrical signals to selectively control the positioning of the flow diverter, said means moving the diverter to the first position when a first signal is present, to the second position when a second electrical signal is applied, and to the third position when a third electrical signal is present.
Claim 2
Dependent Claim
243 words
A fluid switch comprising a first nozzle for generating a first fluid jet; a second nozzle for generating a second fluid jet; a switching chamber forming a cavity into which the generated jets flow; a first fluid receiver communicating with the switching chamber to receive the first jet; a second fluid receiver communicating with the switching chamber to receive the second jet; a vent connected to the switching chamber through which fluid exits the switch; a flow diverter located within the switching chamber and selectively movable to three positions, in a first position the diverter isolates the first and second receivers from the generated jets and diverts the jets to exit the switch via the vent, in a second position the diverter isolates the first receiver from the first jet and diverts the first jet to exit the switch via the vent while simultaneously directing the second jet to the second receiver, and in a third position the diverter isolates the second receiver from the second jet and directs the second jet to exit the switch via the vent while simultaneously directing the first jet to the first receiver; and means responsive to applied electrical signals to selectively control the positioning of the flow diverter, said means moving the diverter to the first position when a first signal is present, to the second position when a second electrical signal is applied, and to the third position when a third electrical signal is present.
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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) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |