Patent US3258022A successfully refreshed from Google Patents.
US3258022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulically powered drive system with pneumatic control circuit
Assignee: Washington Iron Works Inc
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Filing: 1962-07-11
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Granted: 1966-06-28
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Expires: 1982-07-11
Abstract
No abstract record available.
Inventors
- 👤 Thompson James Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:57
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/02; F15B11/04; F15B11/042; F16; F16H; F16H61/00; F16H61/38; F16H61/40; F16H61/4043; F15B2211/00; F15B2211/20; F15B2211/205; F15B2211/2053; F15B2211/30; F15B2211/305; F15B2211/30525; F15B2211/32; F15B2211/329; F15B2211/50; F15B2211/505; F15B2211/50509; F15B2211/50518; F15B2211/50536; F15B2211/515; F15B2211/5151; F15B2211/5153; F15B2211/5154; F15B2211/52; F15B2211/528; F15B2211/55; F15B2211/60; F15B2211/635; F15B2211/6355; F15B2211/70; F15B2211/705; F15B2211/7058; F15B2211/75; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2564; Y10T137/2567
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
173 words
IN COMBINATION: A SOURCE OF CONSTANT-PRESSURE HIGH PRESSURE FLUID AND A SOURCE OF LOW PRESSURE FLUID, A VARIABLE-SPEED FLUID MOTOR, A SUPPLY LINE BETWEEN SAID HIGH PRESSURE SOURCE AND THE MOTOR, A NORMALLY CLOSED VALVE AT THE INGRESS END OF SAID SUPPLY LINE, A MEANS WHICH OPERATES WHEN SUBJECTED TO PRESSURE TO OPEN SAID VALVE SO AS TO DELIVER FLUID FROM THE HIGH-PRESSURE SOURCE INTO SAID SUPPLY LINE, A LINE FROM THE LOW PRESSURE SOURCE FOR SUPPLYING SAID PRESSURE TO THE VALVE-OPENING MEANS, A MANUALLY OPERATED CONTROL VALVE FOR SAID LAST-NAMED SUPPLY LINE ACTING BY THE DEGREE TO WHICH IT IS OPENED TO VARIABLY GOVERN THE PRESSURE, WITHIN A RANGE THE CEILING OF WHICH IS PRESCRIBED BY SAID LOW-PRESSURE SOURCE, OF THE FLUID FED TO THE SUPPLY LINE, AND MEANS GOVERNED AUTOMATICALLY BY SAID GOVERNED VARIABLE PRESSURE WHICH OBTAINS IN THE LOW-PRESSURE SUPPLY LINE FOR DUMPING FLUID FROM THE HIGH-PRESSURE SUPPLY LINE UNTIL THE PRESSURE IN THE LATTER IS A PREDETERMINED MULTIPLE OF THE GOVERNED PRESSURE OBTAINING IN THE LOW PRESSURE SUPPLY LINE.
Claim 2
Dependent Claim
173 words
IN COMBINATION: A SOURCE OF CONSTANT-PRESSURE HIGH PRESSURE FLUID AND A SOURCE OF LOW PRESSURE FLUID, A VARIABLE-SPEED FLUID MOTOR, A SUPPLY LINE BETWEEN SAID HIGH PRESSURE SOURCE AND THE MOTOR, A NORMALLY CLOSED VALVE AT THE INGRESS END OF SAID SUPPLY LINE, A MEANS WHICH OPERATES WHEN SUBJECTED TO PRESSURE TO OPEN SAID VALVE SO AS TO DELIVER FLUID FROM THE HIGH-PRESSURE SOURCE INTO SAID SUPPLY LINE, A LINE FROM THE LOW PRESSURE SOURCE FOR SUPPLYING SAID PRESSURE TO THE VALVE-OPENING MEANS, A MANUALLY OPERATED CONTROL VALVE FOR SAID LAST-NAMED SUPPLY LINE ACTING BY THE DEGREE TO WHICH IT IS OPENED TO VARIABLY GOVERN THE PRESSURE, WITHIN A RANGE THE CEILING OF WHICH IS PRESCRIBED BY SAID LOW-PRESSURE SOURCE, OF THE FLUID FED TO THE SUPPLY LINE, AND MEANS GOVERNED AUTOMATICALLY BY SAID GOVERNED VARIABLE PRESSURE WHICH OBTAINS IN THE LOW-PRESSURE SUPPLY LINE FOR DUMPING FLUID FROM THE HIGH-PRESSURE SUPPLY LINE UNTIL THE PRESSURE IN THE LATTER IS A PREDETERMINED MULTIPLE OF THE GOVERNED PRESSURE OBTAINING IN THE LOW PRESSURE SUPPLY LINE.
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) | 1969-06-27 | 1969-12-27 | 1970-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-27 | 1973-12-27 | 1974-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $7700.00 | Window Closed / Lapsed |