US3866620A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid control valve
Assignee: Parker Hannifin Corp
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Filing: 1972-08-14
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Granted: 1975-02-18
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Expires: 1992-08-14
Abstract
Abstract A servovalve connectible to a source of fluid under pressure comprising first and second receiver passages having first and second inlets, respectively, ejector passage means connectible to the source of fluid and having discharge orifice means spaced from and generally opposite from the inlets, a diverter having first and second outer peripheral sections mounted for movement in the fluid discharged by the discharge orifice means. By appropriately diverting the fluid from the discharge orifice means, a differential fluid output can be provided in the receiver passages. The differential fluid output can be used, for example, to position a spool valve.
Inventors
- 👤 Robert O Morton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:38
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/04; F15B13/042; F15B13/043; F15B13/0436; Y; Y10; Y10T; Y10T137/00; Y10T137/2278; Y10T137/2322; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86582; Y10T137/86614
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
197 words
A servovalve connectible to a source of fluid comprising: means defining first and second receiver passages, said first and second receiver passages having first and second receiver orifices, respectively; ejector passage means connectible to the source of fluid, said ejector passage means having discharge orifice means spaced from said receiver orifices for discharging fluid across the space between the discharge orifice means and the receiver orifices; a diverter having first and second opposite end portions; means for mounting said diverter for movement in the fluid discharged by the discharge orifice means so that said end portions can be impinged by and divert the fluid discharged by said discharge orifice means relative to said said receiver orifices whereby a differential fluid output can be provided in said receiver passages, said end portions being spaced apart in the direction of movement of said diverter; a torque motor including an elongated torque arm mounted for movement about a pivot axis which extends generally transverse to the axis of the torque arm; and said diverter being drivingly connected to the torque arm whereby pivotal movement of the torque arm moves the diverter to control said fluid output in the receiver passages.
Claim 2
Dependent Claim
197 words
A servovalve connectible to a source of fluid comprising: means defining first and second receiver passages, said first and second receiver passages having first and second receiver orifices, respectively; ejector passage means connectible to the source of fluid, said ejector passage means having discharge orifice means spaced from said receiver orifices for discharging fluid across the space between the discharge orifice means and the receiver orifices; a diverter having first and second opposite end portions; means for mounting said diverter for movement in the fluid discharged by the discharge orifice means so that said end portions can be impinged by and divert the fluid discharged by said discharge orifice means relative to said said receiver orifices whereby a differential fluid output can be provided in said receiver passages, said end portions being spaced apart in the direction of movement of said diverter; a torque motor including an elongated torque arm mounted for movement about a pivot axis which extends generally transverse to the axis of the torque arm; and said diverter being drivingly connected to the torque arm whereby pivotal movement of the torque arm moves the diverter to control said fluid output in the receiver passages.
Claim 3
Dependent Claim
42 words
A servovalve as defined in claim 1 wherein each of said end portions includes an end face adapted to be interposed in the fluid discharged from said discharge orifice means, said end faces being inclined and diverging in the direction of flow.
Claim 4
Dependent Claim
29 words
A servovalve as defined in claim 1 wherein each of said end portions has an end face which terminates in the direction of flow in a substantially straight edge.
Claim 5
Dependent Claim
83 words
A servovalve as defined in claim 1 wherein said ejector passage means includes first and second ejector passages adapted to be in communication with the source of fluid and said discharge orifice means includes first and second discharge orifices for the first and second ejector passages, respectively, said orifices discharging first and second fluid streams generally toward the first and second receiver orifices, respectively, said diverter being positionable to divert said first and second streams with said first and second end portions, respectively.
Claim 6
Dependent Claim
33 words
A servovalve as defined in claim 4 wherein said first and second end portions include first and second end faces, respectively, said end faces diverging in the direction of flow of said streams.
Claim 7
Dependent Claim
69 words
A servovalve as defined in claim 1 wherein said torque motor includes electromagnetic means for pivoting the torque arm, spring means for resisting the pivotal movement of the torque arm, and conduit means for providing communication between the spring means and the space between said receiver orifices and said discharge orifice means so that the spring means is unaffected by any changes in fluid pressure occurring in said space.
Claim 8
Dependent Claim
43 words
A servovalve as defined in claim 6 wherein said spring means includes at least one spring strip, the fluid from said space acting on both faces of said strip whereby changes in fluid pressure in said space do not affect said spring strip.
Claim 9
Dependent Claim
51 words
A servovalve as defined in claim 1 wherein said torque motor includes an isolation tube, and a coil wound around the isolation tube, said torque arm being receivable in said isolation tube, said isolation tube being in communication with the fluid and assisting to keep the fluid from contacting the coil.
Claim 10
Dependent Claim
29 words
A servovalve as defined in claim 1 wherein said piVot axis of said torque arm lies outside of said space between the discharge orifice means and the receiver orifices.
Claim 11
Dependent Claim
30 words
A servovalve as defined in claim 1 wherein each of said end portions includes an end face and each of said end faces has at least two straight, parallel edges.
Claim 12
Dependent Claim
18 words
A servovalve as defined in claim 1 wherein each of said end portions includes an planar end face.
Claim 13
Dependent Claim
147 words
A servovalve as defined in claim 1 wherein said pivot axis of said torque arm lies outside of said space between the discharge orifice means and the receiver orifices, each of said end portions includes an end face and each of said end faces has at least two straight, parallel edges, said torque motor includes electromagnetic means for pivoting the torque arm, spring means for resisting the pivotal movement of the torque arm, and conduit means for providing communication between the spring means and the space between said receiver orifices and said discharge orifice means so that the spring means is unaffected by any changes in fluid pressure occurring in said space, said spring means includes at least one spring strip, the fluid from said space acting on both faces of said strip whereby changes in fluid pressure in said space do not affect said spring strip.
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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) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |