US3155040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Booster pressure control for liquid systems
Assignee: Twin Disc Inc
•
Filing: 1962-05-15
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Granted: 1964-11-03
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Expires: 1982-05-15
Abstract
No abstract record available.
Inventors
- 👤 Wilbur F Shurts
- 👤 Joseph B Snoy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:23
CPC Classifications
E; E03; E03B; E03B7/00; E03B7/07; E03B7/075; F; F04; F04D; F04D13/00; F04D13/02; F04D13/021; F04D13/022; F04D15/00; F04D15/0066; F16; F16D; F16D25/00; F16D25/12; F16D25/123; F16D25/14; F16D48/00; F16D48/02; F16D48/04; F16D2048/0209
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
A BOOSTER PRESSURE CONTROL FOR A LIQUID SYSTEM SUPPLIED BY AN EXTERNAL PRESSURE SOURCE COMPRISING A BOOSTER PUMP INTERPOSED BETWEEN THE SOURCE AND SYSTEM, A CONSTANT SPEED POWER SOURCE, AN HYDRAULICALLY ACTUATED, FRICTION PLATE CLUTCH ENGAGEABLE TO PROVIDE A DRIVING CONNECTION BETWEEN THE POWER SOURCE AND BOOSTER PUMP, AND AN HYDRAULIC SYSTEM INCLUDING AN OIL PUMP, FIRST PASSAGE MEANS CONNECTING THE OIL PUMP TO THE CLUTCH FOR APPLYING ENGAGING PRESSURE THERETO, A PRESSURE REGULATING VALVE FOR DETERMINING THE MAXIMUM CLUTCH ENGAGING PRESSURE IN THE FIRST PASSAGE MEANS, SECOND PASSAGE MEANS CONNECTING THE PRESSURE REGULATING VALVE OUTLET TO THE CLUTCH PLATES FOR CONSTANTLY SUPPLYING COOLING OIL THERETO, AND MEANS RESPONSIVE TO PRESSURE VARIATIONS ON THE DISCHARGE SIDE OF THE BOOSTER PUMP AND OPERATIVELY ASSOCIATED WITH THE FIRST PASSAGE MEANS TO BLEED THE PRESSURE THEREIN AND REDUCE THE CLUTCH ENGAGING PRESSURE AS THE PRESSURE IN THE LIQUID SYSTEM APPROACHES A DETERMINED VALUE.
Claim 2
Dependent Claim
150 words
A BOOSTER PRESSURE CONTROL FOR A LIQUID SYSTEM SUPPLIED BY AN EXTERNAL PRESSURE SOURCE COMPRISING A BOOSTER PUMP INTERPOSED BETWEEN THE SOURCE AND SYSTEM, A CONSTANT SPEED POWER SOURCE, AN HYDRAULICALLY ACTUATED, FRICTION PLATE CLUTCH ENGAGEABLE TO PROVIDE A DRIVING CONNECTION BETWEEN THE POWER SOURCE AND BOOSTER PUMP, AND AN HYDRAULIC SYSTEM INCLUDING AN OIL PUMP, FIRST PASSAGE MEANS CONNECTING THE OIL PUMP TO THE CLUTCH FOR APPLYING ENGAGING PRESSURE THERETO, A PRESSURE REGULATING VALVE FOR DETERMINING THE MAXIMUM CLUTCH ENGAGING PRESSURE IN THE FIRST PASSAGE MEANS, SECOND PASSAGE MEANS CONNECTING THE PRESSURE REGULATING VALVE OUTLET TO THE CLUTCH PLATES FOR CONSTANTLY SUPPLYING COOLING OIL THERETO, AND MEANS RESPONSIVE TO PRESSURE VARIATIONS ON THE DISCHARGE SIDE OF THE BOOSTER PUMP AND OPERATIVELY ASSOCIATED WITH THE FIRST PASSAGE MEANS TO BLEED THE PRESSURE THEREIN AND REDUCE THE CLUTCH ENGAGING PRESSURE AS THE PRESSURE IN THE LIQUID SYSTEM APPROACHES A DETERMINED VALUE.
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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) | 1967-11-03 | 1968-05-04 | 1968-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-03 | 1972-05-04 | 1972-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-03 | 1976-05-04 | 1976-11-03 | $7700.00 | Window Closed / Lapsed |