Patent US3136455A successfully refreshed from Google Patents.
US3136455A
Expired / Lapsed
US
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Precision pump
Assignee: Saint Gobain Abrasives Inc
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Filing: 1961-08-10
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Granted: 1964-06-09
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Expires: 1981-08-10
Abstract
No abstract record available.
Inventors
- 👤 Jr Loring Coes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:19
CPC Classifications
G; G01; G01F; G01F11/00; G01F11/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
A PRECISION PUMP FOR SUPPLYING MEASURED QUANTITIES OF LIQUID AT A PREDETERMINED RATE COMPRISING A TWO-PART BARREL, THE LOWER PART PROVIDING A WELL FOR HOLDING A LIQUID AND CONTAINING A DISCHARGE OPENING AT A PREDETERMINED LEVEL FROM THE BOTTOM, MEANS FOR SUPPLYING LIQUID TO THE WELL, A FILLING OPENING AT A HIGHER LEVEL, IN INJECTION NOZZLE AT ITS LOWER END CONTAINING AN ORIFICE, AND DUCTS CONNECTING THE DISCHARGE OPENING TO THE NOZZLE AT BOTH SIDES OF THE ORIFICE, THE UPPER PART CONSTITUTING A CLOSURE FOR THE BARREL AND MOUNTING A GLAND, A FLEXIBLE ELEMENT EXTENDING THROUGH THE GLAND INTO THE BARREL ABOVE THE WELL, A PISTON CONNECTED TO THE END OF THE FLEXIBLE ELEMENT WITHIN THE BARREL, MEANS SUPPORTING THAT PORTION OF THE FLEXIBLE ELEMENT EXTERNALLY OF THE BARREL, AND A TIMER MOTOR INCLUDING A DRIVE PULLY ABOUT WHICH A PORTION OF THE FLEXIBLE ELEMENT IS WRAPPED OPERABLE TO PAY OFF THE ELEMENT AT A PREDETERMINED RATE.
Claim 2
Dependent Claim
157 words
A PRECISION PUMP FOR SUPPLYING MEASURED QUANTITIES OF LIQUID AT A PREDETERMINED RATE COMPRISING A TWO-PART BARREL, THE LOWER PART PROVIDING A WELL FOR HOLDING A LIQUID AND CONTAINING A DISCHARGE OPENING AT A PREDETERMINED LEVEL FROM THE BOTTOM, MEANS FOR SUPPLYING LIQUID TO THE WELL, A FILLING OPENING AT A HIGHER LEVEL, IN INJECTION NOZZLE AT ITS LOWER END CONTAINING AN ORIFICE, AND DUCTS CONNECTING THE DISCHARGE OPENING TO THE NOZZLE AT BOTH SIDES OF THE ORIFICE, THE UPPER PART CONSTITUTING A CLOSURE FOR THE BARREL AND MOUNTING A GLAND, A FLEXIBLE ELEMENT EXTENDING THROUGH THE GLAND INTO THE BARREL ABOVE THE WELL, A PISTON CONNECTED TO THE END OF THE FLEXIBLE ELEMENT WITHIN THE BARREL, MEANS SUPPORTING THAT PORTION OF THE FLEXIBLE ELEMENT EXTERNALLY OF THE BARREL, AND A TIMER MOTOR INCLUDING A DRIVE PULLY ABOUT WHICH A PORTION OF THE FLEXIBLE ELEMENT IS WRAPPED OPERABLE TO PAY OFF THE ELEMENT AT A PREDETERMINED RATE.
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) | 1967-06-09 | 1967-12-09 | 1968-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-09 | 1971-12-09 | 1972-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-09 | 1975-12-09 | 1976-06-09 | $7700.00 | Window Closed / Lapsed |