US3095906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow control servo valve with dynamic load pressure feedback
Assignee: MOOG SERVOCONTROLS Inc
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Filing: 1959-03-05
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Granted: 1963-07-02
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Expires: 1979-03-05
Abstract
No abstract record available.
Inventors
- 👤 Jr Harvard B Kolm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:37
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/04; F15B13/042; F15B13/043; F15B13/0438; F15B9/00; F15B9/16; F15B9/17; Y; Y10; Y10T; Y10T137/00; Y10T137/2278; Y10T137/2409; Y10T137/2452; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86582; Y10T137/8659; Y10T137/86598
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
130 words
IN A SERVO VALVE HAVING ACTUATING PORTS ADAPTED TO BE CONNECTED TO A FLUID-OPERATED LOAD, A FIRST STAGE ELECTROHYDRAULIC AMPLIFIER AND A SECOND STAGE VALVE SPOOL ARRANGED TO BE FLUIDLY DRIVEN BY THE OUTPUT OF SAID AMPLIFIER FOR CONTROLLING THE FLOW OF FLUID THROUGH SAID PORTS, THE COMBINATION THEREWITH OF LOAD PRESSURE FEEDBACK MEANS ASSOCIATED WITH SAID PORTS AND INCLUDING RESLIENTLY RESTRAINED FLUID VOLUME TRANSFER MEANS AND PRESSURE DROP PRODUCING MEANS ARRANGED TO PROVIDE A FREQUENCY SENSITIVE NETWORK FOR REDUCING THE EFFECTIVE FLUID DRIVE ON SAID SPOOL IN RESPONSE TO THE DYNAMIC PRESSURE DIFFERENTIAL IN SAID PORTS AS A RESULT OF LOAD REACTION AND OPERATIVE TO PASS THE LOAD PRESSURE VARIATIONS MORE EFFECTIVELY ABOVE THAN BELOW A PREDETERMINED FREQUENCY, SAID NETWORK BEING FREE OF FLUID FLOW DURING STEADY STATE CONDITIONS.
References Cited (Backward Citations)
US2550723A
Cited
US2647493A
Cited
US2698517A
Cited
US2688314A
Cited
US2767698A
Cited
US2756725A
Cited
US2797666A
Cited
US2790427A
Cited
US2931343A
Cited
US2889815A
Cited
US2972338A
Cited
US2926696A
Cited
US2909195A
Cited
US2939430A
Cited
US3064627A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-07-01 | 1966-12-31 | 1967-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-01 | 1970-12-31 | 1971-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-01 | 1974-12-31 | 1975-07-02 | $7700.00 | Window Closed / Lapsed |