US3599653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Negative feedback fluidic oscillator
Assignee: United States Department of the Army
•
Filing: 1969-09-30
•
Granted: 1971-08-17
•
Expires: 1989-09-30
Abstract
Abstract A supersonic fluid power-jet flows into an overexpanded divergent nozzle. A control flow against one side of the jet splits, passes around, and impinges on the opposite side of the jet. The jet therefore is deflected in the direction from whence the control flow came, rather than being deflected in the normal opposite direction. Two output passageways are provided, one on each side of a longitudinal axis of the power-jet, with a control flow taken from each output. Each control flow is applied to the power-jet on an opposite side of the axis from the output from which the control flow is taken.
Inventors
- 👤 Bobby J Clayton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:21
CPC Classifications
F; F15; F15C; F15C1/00; F15C1/08; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/2229; Y10T137/2234
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
167 words
A negative feedback fluidic oscillator having a longitudinal axis and including a power-jet passageway; an overexpanded divergent nozzle communicating with said passageway; a receiving chamber communicating at one end with said nozzle whereby a power-jet from said power-jet passageway attains a supersonic velocity in said receiving chamber; a spliter at the opposite end of said chamber; first and second output passageways on opposite sides of said spliter and said axis; first and second control passageways each having two ends, with one end of each of said control passageways communicating with a respective output passageway, and the other end communicating with said nozzle on an opposite side of said axis from the output passageway to which each of said one ends communicates, wherein said receiving chamber, said nozzle, and said other end of each of said control passageways have surfaces defined by two planes parallel to each other and to said axis, and wherein said power-jet expands to a size less than the distance between said two planes.
Claim 2
Dependent Claim
167 words
A negative feedback fluidic oscillator having a longitudinal axis and including a power-jet passageway; an overexpanded divergent nozzle communicating with said passageway; a receiving chamber communicating at one end with said nozzle whereby a power-jet from said power-jet passageway attains a supersonic velocity in said receiving chamber; a spliter at the opposite end of said chamber; first and second output passageways on opposite sides of said spliter and said axis; first and second control passageways each having two ends, with one end of each of said control passageways communicating with a respective output passageway, and the other end communicating with said nozzle on an opposite side of said axis from the output passageway to which each of said one ends communicates, wherein said receiving chamber, said nozzle, and said other end of each of said control passageways have surfaces defined by two planes parallel to each other and to said axis, and wherein said power-jet expands to a size less than the distance between said two planes.
Claim 3
Dependent Claim
64 words
The oscillator as defined in claim 1, wherein said other ends of said control passageways communicate with said nozzle at a position along said axis to allow a flow in either one the control passageways to split and pass around said power-jet, and impinge on the power-jet from the opposite side, and thereby deflect the power-jet in the direction from whence the control came.
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) | 1974-08-16 | 1975-02-15 | 1975-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-16 | 1979-02-15 | 1979-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-16 | 1983-02-15 | 1983-08-17 | $7700.00 | Window Closed / Lapsed |