US3285327A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Discharge cooler for rotary positive displacement vacuum pump
Assignee: Dresser Industries Inc
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Filing: 1964-08-05
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Granted: 1966-11-15
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Expires: 1984-08-05
Abstract
No abstract record available.
Inventors
- 👤 David B Herrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:19
CPC Classifications
F; F04; F04C; F04C29/00; F04C29/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
178 words
A VACUUM PUMP OF THE ROTARY POSITIVE DISPLACEMENT TYPE COMPRISING A CASING HAVING A GAS INLET AND A GAS OUTLET, A PAIR OF MULTILOBE IMPELLERS ROTATABLY MOUNTED IN SAID CASING AND ADAPTED TO DISPLACE GAS FROM SAID GAS INLET TO SAID GAS OUTLET, A HOUSING INTEGRAL WITH SAID CASING AND HAVING AN INLET OPENING AND AN OUTLET OPENING, SAID INLET OPENING OF SAID HOUSING BEING ALIGNED WITH SAID GAS OUTLET, A HEAT EXCHANGER MOVABLY SUPPORTED WITHIN SAID HOUSING AND MEANS OPERATIVELY CONNECTED TO SAID HEAT EXCHANGER AND ADAPTED TO BE HYDRAULICALLY ACTUATED FOR MOVING SAID HEAT EXCHANGER INTO AND OUT OF THE PATH OF THE GAS DISCHARGE FROM SAID GAS OUTLET, SAID MEANS UPON ACTUATION TO MOVE SAID HEAT EXCHANGER INTO THE PATH OF THE GAS DISCHARGE FROM SAID GAS OUTLET SERVING TO POSITION THE HEAT EXCHANGER IN SAID GAS OUTLET IN CLOSE PROXIMITY TO THE MAXIMUM EXTENT OF TRAVEL OF THE LOBES OF THE IMPELLERS AS THEY ROTATE PAST THE GAS OUTLET AND TO POSITIVELY HOLD SAID HEAT EXCHANGER IN POSITION TO PREVENT DUE TO GAS PULSATION.
Claim 2
Dependent Claim
178 words
A VACUUM PUMP OF THE ROTARY POSITIVE DISPLACEMENT TYPE COMPRISING A CASING HAVING A GAS INLET AND A GAS OUTLET, A PAIR OF MULTILOBE IMPELLERS ROTATABLY MOUNTED IN SAID CASING AND ADAPTED TO DISPLACE GAS FROM SAID GAS INLET TO SAID GAS OUTLET, A HOUSING INTEGRAL WITH SAID CASING AND HAVING AN INLET OPENING AND AN OUTLET OPENING, SAID INLET OPENING OF SAID HOUSING BEING ALIGNED WITH SAID GAS OUTLET, A HEAT EXCHANGER MOVABLY SUPPORTED WITHIN SAID HOUSING AND MEANS OPERATIVELY CONNECTED TO SAID HEAT EXCHANGER AND ADAPTED TO BE HYDRAULICALLY ACTUATED FOR MOVING SAID HEAT EXCHANGER INTO AND OUT OF THE PATH OF THE GAS DISCHARGE FROM SAID GAS OUTLET, SAID MEANS UPON ACTUATION TO MOVE SAID HEAT EXCHANGER INTO THE PATH OF THE GAS DISCHARGE FROM SAID GAS OUTLET SERVING TO POSITION THE HEAT EXCHANGER IN SAID GAS OUTLET IN CLOSE PROXIMITY TO THE MAXIMUM EXTENT OF TRAVEL OF THE LOBES OF THE IMPELLERS AS THEY ROTATE PAST THE GAS OUTLET AND TO POSITIVELY HOLD SAID HEAT EXCHANGER IN POSITION TO PREVENT DUE TO GAS PULSATION.
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) | 1969-11-14 | 1970-05-16 | 1970-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-14 | 1974-05-16 | 1974-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-14 | 1978-05-16 | 1978-11-15 | $7700.00 | Window Closed / Lapsed |