US3129645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically modulated fluid valve
Assignee: DOUBLE A PRODUCTS Co
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Filing: 1962-05-02
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Granted: 1964-04-21
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Expires: 1982-05-02
Abstract
No abstract record available.
Inventors
- 👤 Peter B Olmsted
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:15
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/04; F15B13/042; F15B13/043; F15B13/0431; F15B21/00; F15B21/08; Y; Y10; Y10S; Y10S60/00; Y10S60/911; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86582; Y10T137/86614
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
209 words
MEANS FOR REMOTELY CONTROLLING THE DIRECTION AND SPEED OF A FLUID MOTOR, COMPRISING: A PUMP ADAPTED TO SUPPLY FLUID UNDER PRESSURE; A FLUID RESERVOIR; A FOUR-WAY THROTTING VALVE OPERATIVELY INTECONNECTING SAID FLUID MOTOR, RESERVOIR AND PUMP AND HAVING A NORMALLY CENTERED VALVE SPOOL THEREIN ADAPTED TO BE SELECTIVELY POSITIONED TO CONTROL THE DIRECTION AND SPEED OF SAID FLUID MOTOR, SAID SPOOL WHEN CENTERED ADAPTED TO PREVENT FLUID FROM SAID PUMP FROM DRIVING SAID MOTOR; FIRST PRESSURERESPONSIVE MEANS FOR MOVING SAID SPOOL IN ONE DIRECTION; SECOND PRESSURE-RESPONSIVE MEANS FOR MOVING SAID SPOOL IN THE OPPOSITE DIRECTION; MEANS FOR SUPPLYING FLUID UNDER CONTROL PRESSURE; FIRST VALVE MEANS FOR SUPPLYING FLUID UNDER CONTROL PRESSURE TO SAID FIRST PRESSURE-RESPONSIVE MEANS; SECOND VALVE MEANS FOR SUPPLYING FLUID UNDER CONTROL PRESSURE TO SAID SECOND PRESSURE-RESPONSIVE MEANS; SAID FIRST AND SECOND VALVE MEANS BEING ARRANGED IN SUCH A WAY THAT WHEN NEITHER VALVE MEANS IS ACTUATED SAID FOUR-WAY VALVE IS CENTERED AND FLUID FROM SAID PUMP IS PREVENTED FROM DRIVING SAID MOTOR, WHEN SAID FIRST VALVE MEANS IS ACTUATED SAID FIRST PRESSURE-RESPONSIVE MEANS IS SUPPLIED WITH FLUID UNDER CONTROL PRESSURE AND SAID SECOND PRESSURE-RESPONSIVE MEANS IS PLACED IN RESTRICTED COMMUNICATION WITH SAID RESERVOIR WHEREBY SAID SPOOL WILL BE FORCED SLOWLY IN ONE DIRECTION TO ACCELERATE SAID
Claim 2
Dependent Claim
209 words
MEANS FOR REMOTELY CONTROLLING THE DIRECTION AND SPEED OF A FLUID MOTOR, COMPRISING: A PUMP ADAPTED TO SUPPLY FLUID UNDER PRESSURE; A FLUID RESERVOIR; A FOUR-WAY THROTTING VALVE OPERATIVELY INTECONNECTING SAID FLUID MOTOR, RESERVOIR AND PUMP AND HAVING A NORMALLY CENTERED VALVE SPOOL THEREIN ADAPTED TO BE SELECTIVELY POSITIONED TO CONTROL THE DIRECTION AND SPEED OF SAID FLUID MOTOR, SAID SPOOL WHEN CENTERED ADAPTED TO PREVENT FLUID FROM SAID PUMP FROM DRIVING SAID MOTOR; FIRST PRESSURERESPONSIVE MEANS FOR MOVING SAID SPOOL IN ONE DIRECTION; SECOND PRESSURE-RESPONSIVE MEANS FOR MOVING SAID SPOOL IN THE OPPOSITE DIRECTION; MEANS FOR SUPPLYING FLUID UNDER CONTROL PRESSURE; FIRST VALVE MEANS FOR SUPPLYING FLUID UNDER CONTROL PRESSURE TO SAID FIRST PRESSURE-RESPONSIVE MEANS; SECOND VALVE MEANS FOR SUPPLYING FLUID UNDER CONTROL PRESSURE TO SAID SECOND PRESSURE-RESPONSIVE MEANS; SAID FIRST AND SECOND VALVE MEANS BEING ARRANGED IN SUCH A WAY THAT WHEN NEITHER VALVE MEANS IS ACTUATED SAID FOUR-WAY VALVE IS CENTERED AND FLUID FROM SAID PUMP IS PREVENTED FROM DRIVING SAID MOTOR, WHEN SAID FIRST VALVE MEANS IS ACTUATED SAID FIRST PRESSURE-RESPONSIVE MEANS IS SUPPLIED WITH FLUID UNDER CONTROL PRESSURE AND SAID SECOND PRESSURE-RESPONSIVE MEANS IS PLACED IN RESTRICTED COMMUNICATION WITH SAID RESERVOIR WHEREBY SAID SPOOL WILL BE FORCED SLOWLY IN ONE DIRECTION TO ACCELERATE SAID
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) | 1967-04-21 | 1967-10-21 | 1968-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-21 | 1971-10-21 | 1972-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-21 | 1975-10-21 | 1976-04-21 | $7700.00 | Window Closed / Lapsed |