US3833017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic valve with non-round control nozzle
Assignee: Parker Intangibles LLC
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Filing: 1973-04-09
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Granted: 1974-09-03
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Expires: 1993-04-09
Abstract
Abstract It is conventional to employ a round nozzle and a movable flapper in a ''''hydraulic means'''' in certain types of hydraulic or servo valves in order to control the movement of a valve member in such a valve in connecting various conventional ports. Such a valve can be improved by forming the nozzle of a shape such as an elongated rectilinear or oval which maximizes the perimeter length around the nozzle per unit of cross-sectional area of the nozzle. This maximizes the flow between the nozzle and the flapper in various positions of the flapper without a corresponding increase in the force of hydraulic fluid exerting pressure on the flapper. Several of such nozzles are normally used in a valve. The flapper in a valve as indicated is normally moved by a torque motor.
Inventors
- 👤 C Gordon
- 👤 W Stoesser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:09
CPC Classifications
F; F15; F15B; F15B5/00; F15B5/003; F15B13/00; F15B13/02; F15B13/04; F15B13/042; F15B13/043; F15B13/0438; Y; Y10; Y10T; Y10T137/00; Y10T137/2278; Y10T137/2322; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86582; Y10T137/8659; Y10T137/86598
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
186 words
A hydraulic valve which includes a valve body having a pressure port, a return port and at least one load port, a valve member movably mounted in said valve body so as to be capable of being moved between operative positions relative to these ports and a hydraulic means for applying pressure to the valve member in order to move it between these operative positions, said hydraulic means including at least one nozzle through which hydraulic fluid flows during the operation of said valve and an imperforate flapper movably mounted adjacent to and opposite said nozzle so as to be capable of being moved through the application of mechanical force towards and away from said nozzle against the pressure of fluid emitted from said nozzle, in which the improvement comprises: said nozzle having a non-round discharge orifice shape which maximizes the perimeter length around said nozzle per unit of cross-sectional area of said nozzle so as to maximize the fluid flow between said nozzle and said flapper while minimizing the mechanical force necessary to move said flapper towards said nozzle during the operation of said valve.
Claim 2
Dependent Claim
186 words
A hydraulic valve which includes a valve body having a pressure port, a return port and at least one load port, a valve member movably mounted in said valve body so as to be capable of being moved between operative positions relative to these ports and a hydraulic means for applying pressure to the valve member in order to move it between these operative positions, said hydraulic means including at least one nozzle through which hydraulic fluid flows during the operation of said valve and an imperforate flapper movably mounted adjacent to and opposite said nozzle so as to be capable of being moved through the application of mechanical force towards and away from said nozzle against the pressure of fluid emitted from said nozzle, in which the improvement comprises: said nozzle having a non-round discharge orifice shape which maximizes the perimeter length around said nozzle per unit of cross-sectional area of said nozzle so as to maximize the fluid flow between said nozzle and said flapper while minimizing the mechanical force necessary to move said flapper towards said nozzle during the operation of said valve.
Claim 3
Dependent Claim
17 words
A valve as claimed in claim 1 wherein: said nozzle is of a flat, rectangular, slot-like shape.
Claim 4
Dependent Claim
16 words
A valve as claimed in claim 1 wherein: said nozzle is of a flat, elliptical shape.
Claim 5
Dependent Claim
38 words
A valve as claimed in claim 1 wherein: there are two of said nozzles directed to opposed flat surfaces of said flapper, and both of said nozzles have a non-round discharge orifice shape as defined in claim 1.
Claim 6
Dependent Claim
19 words
A valve as claimed in claim 4 wherein: both of said nozzles are of a flat, rectangular slot-like shape.
Claim 7
Dependent Claim
18 words
A valve as claimed in claim 4 wherein: both of said nozzles are of a flat, elliptical shape.
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) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |