US3075689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum pump
Assignee: Consolidated Vacuum Corp
•
Filing: 1961-11-20
•
Granted: 1963-01-29
•
Expires: 1981-11-20
Abstract
No abstract record available.
Inventors
- 👤 Donald L Stevenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:04
CPC Classifications
F; F04; F04F; F04F9/00; Y; Y10; Y10S; Y10S55/00; Y10S55/15
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
IN A VAPOR VACUUM PUMP, A PUMP CASING HAVING AN INLET, AN OUTLET, AND A BOILER FOR HEATING PUMP FLUID, A NOZZLE ASSEMBLY MOUNTED IN THE PUMP CASING FOR PROVIDING A VAPOR JET STREAM, SAID NOZZLE ASSEMBLY HAVING AT LEAST ONE JET NOZZLE COMPRISING A LIP PORTION AND A SKIRT BETWEEN WHICH THE JET OF VAPOR IS EXPELLED FOR PUMPING ACTION, A CAP SURROUNDING SAID JET NOZZLE IN SPACED RELATION TO SAID SKIRT AND HAVING AN EDGE EXTENDING BELOW SAID SKIRT AND INTO THE FRINGE PORTIONS OF THE JET STREAM, SAID CAP HAVING THE SURFACE WHICH IS ADJACENT THE JET NOZZLE REFLECTIVE THEREBY TO REFLECT SOME OF THE HEAT EMANATING FROM THE JET NOZZLE WHICH WOULD THERMALLY AFFECT SAID CAP, AND A SHIELD MOUNTED BETWEEN SAID SKIRT AND SAID CAP IN SPACED RELATION THEREBETWEEN FOR FURTHER REDUCING THE TRANSFER HEAT TO SAID CAP.
Claim 2
Dependent Claim
143 words
IN A VAPOR VACUUM PUMP, A PUMP CASING HAVING AN INLET, AN OUTLET, AND A BOILER FOR HEATING PUMP FLUID, A NOZZLE ASSEMBLY MOUNTED IN THE PUMP CASING FOR PROVIDING A VAPOR JET STREAM, SAID NOZZLE ASSEMBLY HAVING AT LEAST ONE JET NOZZLE COMPRISING A LIP PORTION AND A SKIRT BETWEEN WHICH THE JET OF VAPOR IS EXPELLED FOR PUMPING ACTION, A CAP SURROUNDING SAID JET NOZZLE IN SPACED RELATION TO SAID SKIRT AND HAVING AN EDGE EXTENDING BELOW SAID SKIRT AND INTO THE FRINGE PORTIONS OF THE JET STREAM, SAID CAP HAVING THE SURFACE WHICH IS ADJACENT THE JET NOZZLE REFLECTIVE THEREBY TO REFLECT SOME OF THE HEAT EMANATING FROM THE JET NOZZLE WHICH WOULD THERMALLY AFFECT SAID CAP, AND A SHIELD MOUNTED BETWEEN SAID SKIRT AND SAID CAP IN SPACED RELATION THEREBETWEEN FOR FURTHER REDUCING THE TRANSFER HEAT TO SAID CAP.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-28 | 1966-07-30 | 1967-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-28 | 1970-07-30 | 1971-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-28 | 1974-07-30 | 1975-01-29 | $7700.00 | Window Closed / Lapsed |