Patent US4276943A successfully refreshed from Google Patents.
US4276943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluidic pulser
Assignee: United States Department of the Army
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Filing: 1979-09-25
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Granted: 1981-07-07
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Expires: 1999-09-25
Abstract
Abstract A fluid telemetry system is disclosed which utilizes an improved pulsing ice. The pulser comprises a bistable fluid amplifier. Both outlets of the bistable fluid amplifier communicate tangentially with a vortex chamber. A pulse in the fluid entering the amplifier may be produced each time the fluid flow is diverted from one outlet to the other.
Inventors
- 👤 Allen B. Holmes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:43
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/12; E21B47/14; E21B47/18; E21B47/20; F; F15; F15C; F15C1/00; F15C1/22; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/2087; Y10T137/2098; Y10T137/2109
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
156 words
A device for producing pulses in a fluid body comprising, bi-stable fluid amplifier means for establishing a stable flow of fluid through one outlet thereof, said bi-stable amplifier having dual outlets, vortex chamber means hving inlets on the periphery thereof and at least one outlet at the center thereof, said outlets of said bi-stable amplifier means entering said vortex chamber tangentially in opposite directions through said inlets on the periphery thereof, and control means associated with said bi-stable amplifier means for selectively diverting the stable flow in one outlet thereof and for establishing stable flow through the other of said dual outlets, whereby fluid flow through said amplifier means and said vortex chamber means is restricted to a first degree during diversion of the stable fluid flow, and to a second greater degree when the stable flow passes through only one of said outlets, thereby producing pulses in said fluid each time said flow is diverted.
Claim 2
Independent Claim
156 words
A device for producing pulses in a fluid body comprising, bi-stable fluid amplifier means for establishing a stable flow of fluid through one outlet thereof, said bi-stable amplifier having dual outlets, vortex chamber means hving inlets on the periphery thereof and at least one outlet at the center thereof, said outlets of said bi-stable amplifier means entering said vortex chamber tangentially in opposite directions through said inlets on the periphery thereof, and control means associated with said bi-stable amplifier means for selectively diverting the stable flow in one outlet thereof and for establishing stable flow through the other of said dual outlets, whereby fluid flow through said amplifier means and said vortex chamber means is restricted to a first degree during diversion of the stable fluid flow, and to a second greater degree when the stable flow passes through only one of said outlets, thereby producing pulses in said fluid each time said flow is diverted.
Claim 3
Dependent Claim
42 words
A device as in claim 1, wherein said bi-stable fluid amplifier means comprises an inlet and a nozzle providing said flow, and said control means comprises a control port on either side of said nozzle for admitting control fluid to the amplifier.
Claim 4
Dependent Claim
27 words
A device as in claim 2, further comprising a control loop in fluid communication with each of said control ports for providing control fluid to said ports.
Claim 5
Dependent Claim
24 words
A device as in claim 3 further comprising electromechanical means associated with said control loop for generating pulses in fluid in said control loop.
Claim 6
Dependent Claim
44 words
A device as in claim 4 wherein said electromechanical means comprises an electrically actuated solenoid means in said loop and fluidically coupled to each of said control ports, and means responsive to actuation of said solenoid for generating a pulse in said control loop.
Claim 7
Dependent Claim
41 words
A device as in claim 5 comprising diaphragm means associated with said solenoid means and in contact with fluid in said loop, said diaphragm means producing pulses in the fluid in said loop in response to movement of said solenoid means.
Claim 8
Dependent Claim
34 words
A device as in claim 3 further comprising a fluid inlet to said control loop for receiving pulses in said fluid body and directing said pulses to a selected one of said control ports.
Claim 9
Dependent Claim
78 words
A device as in claim 1 or 5, in combination with a drill string having fluid flowing therethrough, additionally comprising sensing means associated with said drill string and responsive to physical conditions encountered by said drill string, said sensing means comprising means for generating signals in response to said physical conditions, wherein said device for producing pulses in said body of fluid produces such pulses in the fluid flowing through said drill string in response to said signals.
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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) | 1984-07-06 | 1985-01-05 | 1985-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-06 | 1989-01-05 | 1989-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-06 | 1993-01-05 | 1993-07-07 | $7700.00 | Window Closed / Lapsed |