Patent US4420085A successfully refreshed from Google Patents.
Patent US3207080A successfully refreshed from Google Patents.
US3207080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Balanced pressure pump
Assignee: PANTHER PUMPS AND EQUIPMENT CO Inc
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Filing: 1962-11-05
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Granted: 1965-09-21
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Expires: 1982-11-05
Abstract
No abstract record available.
Inventors
- 👤 Paul W Schlosser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:15
CPC Classifications
B; B05; B05B; B05B9/00; B05B9/03; B05B9/04; B05B9/0403; B05B9/0409; F; F01; F01L; F01L23/00; F04; F04B; F04B43/00; F04B43/0009; F04B43/0054; F04B43/02; F04B43/025; F04B43/026; F04B43/06; F04B43/073; F04B43/0736; F04B53/00; F04B53/16; F04B53/162; F04B53/164; F04B9/00; F04B9/08; F04B9/10; F04B9/109; F04B9/111; F04B9/115
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
168 words
IN APPARATUS OF THE TYPE DESCRIBED, THE COMBINATION COMPRISING MEANS DEFINING A FIRST CHAMBER, MEANS DEFINING A SECOND CHAMBER, A FIRST FLEXIBLE DIAPHRAGM CONNECTED ACROSS SAID FIRST CHAMBER AND SEPARATING SAID FIRST CHAMBER INTO A PUMPING CHAMBER AND A DRIVE CHAMBER, A SECOND FLEXIBLE DIAPHRAGM CONNECTED ACROSS SAID SECOND CHAMBER AND SEPARATING SAID SECOND CHAMBER INTO A PUMPING CHAMBER AND A DRIVE CHAMBER, A RIGID CONNECTION BETWEEN SAID DIAPHRAGMS FOR INSURING SYNCHRONOUS OPERATION OF BOTH DIAPHRAGMS, A SOURCE OF PRESSURIZED FLUID, A SPOOL CONTROL VALVE HAVING A CONTROL MEMBER, SAID VALVE CONNECTING SAID SOURCE TO SAID DRIVE CHAMBER IN SAID FIRST CHAMBER WHEN SAID CONTROL MEMBER OF SAID VALVE IS IN A FIRST OPERATIVE POSITION AND FOR CONNECTING SAID SOURCE TO SAID DRIVE CHAMBER IN SAID SECOND CHAMBER WHEN SAID CONTROL MEMBER OF SAID VALVE IS IN A SECOND OPERATIVE POSITION, AND A MECHANICAL CONNECTION BETWEEN SAID RIGID CONNECTION AND SAID CONTROL MEMBER TO OPERATE SAID VALVE IN ACCORDANCE WITH THE POSITIONS OF SAID DIAPHRAGMS IN SAID CHAMBERS.
Claim 2
Dependent Claim
168 words
IN APPARATUS OF THE TYPE DESCRIBED, THE COMBINATION COMPRISING MEANS DEFINING A FIRST CHAMBER, MEANS DEFINING A SECOND CHAMBER, A FIRST FLEXIBLE DIAPHRAGM CONNECTED ACROSS SAID FIRST CHAMBER AND SEPARATING SAID FIRST CHAMBER INTO A PUMPING CHAMBER AND A DRIVE CHAMBER, A SECOND FLEXIBLE DIAPHRAGM CONNECTED ACROSS SAID SECOND CHAMBER AND SEPARATING SAID SECOND CHAMBER INTO A PUMPING CHAMBER AND A DRIVE CHAMBER, A RIGID CONNECTION BETWEEN SAID DIAPHRAGMS FOR INSURING SYNCHRONOUS OPERATION OF BOTH DIAPHRAGMS, A SOURCE OF PRESSURIZED FLUID, A SPOOL CONTROL VALVE HAVING A CONTROL MEMBER, SAID VALVE CONNECTING SAID SOURCE TO SAID DRIVE CHAMBER IN SAID FIRST CHAMBER WHEN SAID CONTROL MEMBER OF SAID VALVE IS IN A FIRST OPERATIVE POSITION AND FOR CONNECTING SAID SOURCE TO SAID DRIVE CHAMBER IN SAID SECOND CHAMBER WHEN SAID CONTROL MEMBER OF SAID VALVE IS IN A SECOND OPERATIVE POSITION, AND A MECHANICAL CONNECTION BETWEEN SAID RIGID CONNECTION AND SAID CONTROL MEMBER TO OPERATE SAID VALVE IN ACCORDANCE WITH THE POSITIONS OF SAID DIAPHRAGMS IN SAID CHAMBERS.
References Cited (Backward Citations)
US326545A
Cited
US491116A
Cited
FR744815A
Cited
US1667138A
Cited
US1905284A
Cited
US2260306A
Cited
US2237758A
Cited
US2402114A
Cited
US2673525A
Cited
US2703055A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |