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US3575187A
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US
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Fluidic pressure-insensitive oscillator
Assignee: Garrett Corp
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Filing: 1968-06-13
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Granted: 1971-04-20
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Expires: 1988-06-13
Abstract
Abstract The subject fluidic oscillator means includes a pair of bistable amplifiers having feedback control lines selected and connected in a manner to render the resulting device relatively insensitive to variations in the fluid pressure supply. The control signal ports of each amplifier are connected with the output ports of the other amplifier by conductors of predetermined differential length-to-area and volume ratios so selected and combined as to counteract the effects of supply pressure change, thus securing the above-mentioned result.
Inventors
- 👤 Trevor G Sutton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:39
CPC Classifications
F; F15; F15C; F15C1/00; F15C1/08; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/212; Y10T137/2125; Y10T137/2131; Y10T137/2142; Y10T137/2147; Y10T137/2153
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
129 words
An inlet pressure-insensitive fluidic oscillator means, comprising: a. first and second bistable amplifiers, each having a main jet nozzle for receiving fluid under variable supply pressure and creating a power stream, a pair of output ports, and a control jet nozzle at each side of said main jet nozzle for applying control streams to said power stream to deflect the same and vary the proportion of fluid discharged through said output ports; and b. a set of passages leading from the output ports of each amplifier to the control jet nozzles of the other amplifier, one set of passages being arranged in inverse relationship to the other set and one set being constructed to have orifice flow characteristics and the other set being constructed to have capillary flow characteristics.
Claim 2
Dependent Claim
129 words
An inlet pressure-insensitive fluidic oscillator means, comprising: a. first and second bistable amplifiers, each having a main jet nozzle for receiving fluid under variable supply pressure and creating a power stream, a pair of output ports, and a control jet nozzle at each side of said main jet nozzle for applying control streams to said power stream to deflect the same and vary the proportion of fluid discharged through said output ports; and b. a set of passages leading from the output ports of each amplifier to the control jet nozzles of the other amplifier, one set of passages being arranged in inverse relationship to the other set and one set being constructed to have orifice flow characteristics and the other set being constructed to have capillary flow characteristics.
Claim 3
Dependent Claim
60 words
The inlet pressure-insensitive fluidic oscillator means of claim 1 in which the output ports of each amplifier communicate with the control jet nozzles of the other amplifier via passages having substantially equal cross-sectional areas, the passages leading from the output ports of one amplifier being of greater length than the passages leading from the output ports of the other amplifier.
Claim 4
Dependent Claim
27 words
The pressure-insensitive fluidic oscillator means of claim 2, in which the passages of the first set have a greater length than the passages of the second set.
Claim 5
Dependent Claim
36 words
The inlet pressure-insensitive fluidic oscillator means of claim 3 in which the output ports of the second amplifier communicate with load orifices downstream of the points of communication of the passages of said second set therewith.
Claim 6
Dependent Claim
38 words
The inlet pressure-insensitive fluidic oscillator means of claim 2 in which the ratio of the length of the passages leading from one amplifier relative to the length of the passages leading from the other amplifier is substantially 5/30.
Claim 7
Dependent Claim
37 words
The inlet pressure-insensitive fluidic oscillator means of claim 1 in which the output ports of the second amplifier communicate with the control jet nozzles of the first amplifier via passages having relatively small length-to-area and volume ratios.
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) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |