US3339830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum operated pump
Assignee: Individual
•
Filing: 1966-10-05
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Granted: 1967-09-05
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Expires: 1986-10-05
Abstract
No abstract record available.
Inventors
- 👤 George C Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:53
CPC Classifications
F; F04; F04B; F04B35/00; F04B35/008; F04B45/00; F04B9/00; F04B9/08; F04B9/12; F04B9/1207
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
175 words
A PUMP COMPRISING A HOUSING, A FLEXIBLE DIAPHRAGM MOUNTED IN SAID HOUSING AND DIVIDING THE INTERIOR OF THE LATTER INTO FIRST AND SECOND VACUUM CHAMBERS, MEANS FOR SUBJECTING SAID FIRST AND SECOND VACUUM CHAMBERS ALTERNATELY TO NEGATIVE PRESSURE AND ATMOSPHERIC PRESSURE FOR MOVING SAID DIAPHRAGM RECIPROCABLY WITHIN SAID HOUSING, A PRESSURE CYLINDER ON SAID HOUSING, A PARTITION BETWEEN SAID PRESSURE CYLINDER AND SAID FIRST VACUUM CHAMBER, A PISTON ROD CONNECTED TO ONE SIDE OF SAID DIAPHRAGM, AN APERTURE IN SAID PARTITION THROUGH WHICH SAID ROD MOVES RECIPROCABLY, PORTION OF SAID ROD EXTENDING INTO SAID PRESSURE CYLINDER, A PISTON MOUNTED ON SAID ROD AND MOVABLE RECIPROCABLY WITHIN SAID PRESSURE CYLINDER, AND ONEWAY SEALING MEANS MOUNTED BETWEEN SAID ROD AND SAID PARTITION EFFECTIVELY ISOLATING SAID FIRST VACUUM CHAMBER FROM SAID PRESSURE CYLINDER DURING THE TIME WHEN SAID FIRST VACUUM CHAMBER IS UNDER NEGATIVE PRESSURE TO CAUSE SAID DIAPHRAGM TO PERFORM THE PRESSURE STROKE FOR SAID ROD AND SAID PISTON, SAID ONE-WAY SEALING MEANS BEING EXPOSED TO AND BEING ACTIVATED BY ATMOSPHERIC PRESSURE TO PRODUCE ITS SEALING FUNCTION.
Claim 2
Dependent Claim
175 words
A PUMP COMPRISING A HOUSING, A FLEXIBLE DIAPHRAGM MOUNTED IN SAID HOUSING AND DIVIDING THE INTERIOR OF THE LATTER INTO FIRST AND SECOND VACUUM CHAMBERS, MEANS FOR SUBJECTING SAID FIRST AND SECOND VACUUM CHAMBERS ALTERNATELY TO NEGATIVE PRESSURE AND ATMOSPHERIC PRESSURE FOR MOVING SAID DIAPHRAGM RECIPROCABLY WITHIN SAID HOUSING, A PRESSURE CYLINDER ON SAID HOUSING, A PARTITION BETWEEN SAID PRESSURE CYLINDER AND SAID FIRST VACUUM CHAMBER, A PISTON ROD CONNECTED TO ONE SIDE OF SAID DIAPHRAGM, AN APERTURE IN SAID PARTITION THROUGH WHICH SAID ROD MOVES RECIPROCABLY, PORTION OF SAID ROD EXTENDING INTO SAID PRESSURE CYLINDER, A PISTON MOUNTED ON SAID ROD AND MOVABLE RECIPROCABLY WITHIN SAID PRESSURE CYLINDER, AND ONEWAY SEALING MEANS MOUNTED BETWEEN SAID ROD AND SAID PARTITION EFFECTIVELY ISOLATING SAID FIRST VACUUM CHAMBER FROM SAID PRESSURE CYLINDER DURING THE TIME WHEN SAID FIRST VACUUM CHAMBER IS UNDER NEGATIVE PRESSURE TO CAUSE SAID DIAPHRAGM TO PERFORM THE PRESSURE STROKE FOR SAID ROD AND SAID PISTON, SAID ONE-WAY SEALING MEANS BEING EXPOSED TO AND BEING ACTIVATED BY ATMOSPHERIC PRESSURE TO PRODUCE ITS SEALING FUNCTION.
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) | 1970-09-04 | 1971-03-06 | 1971-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-04 | 1975-03-06 | 1975-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-04 | 1979-03-06 | 1979-09-05 | $7700.00 | Window Closed / Lapsed |