US3270675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary sliding-vane pump
Assignee: Williams and Hussey Machine Corp
•
Filing: 1964-09-15
•
Granted: 1966-09-06
•
Expires: 1984-09-15
Abstract
No abstract record available.
Inventors
- 👤 Mustafa J Ajam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:51
CPC Classifications
F; F04; F04C; F04C14/00; F04C14/24; F04C14/26; F04C14/28; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1797; Y10T137/1812
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A PUMP COMPRISING A HOUSING HAVING INLET AND OUTLET CHAMBERS, MEANS FOR PUMPING FLUID FROM THE INLET CHAMBER TO THE OUTLET CHAMBER, A BY-PASS FROM THE OUTLET CHAMBER TO THE INLET CHAMBER, A RELIEF VALVE IN THE BY-PASS WHICH OPENS IN RESPONSE TO PRESSURE IN THE OUTLET CHAMBER, AN AIR INLET IN THE INLET CHAMBER, AND A CLOSURE WHICH NORMALLY CLOSES SAID INLET AND WHICH OPENS AT A PREDETERMINED TEMPERATURE SO THAT, WHEN THE PUMP REACHES SAID TEMPERATURE, IT IS COOLED BY AIR DRAWN THROUGH THE INLET AND CIRCULATED THROUGH THE PUMP.
Claim 2
Dependent Claim
92 words
A PUMP COMPRISING A HOUSING HAVING INLET AND OUTLET CHAMBERS, MEANS FOR PUMPING FLUID FROM THE INLET CHAMBER TO THE OUTLET CHAMBER, A BY-PASS FROM THE OUTLET CHAMBER TO THE INLET CHAMBER, A RELIEF VALVE IN THE BY-PASS WHICH OPENS IN RESPONSE TO PRESSURE IN THE OUTLET CHAMBER, AN AIR INLET IN THE INLET CHAMBER, AND A CLOSURE WHICH NORMALLY CLOSES SAID INLET AND WHICH OPENS AT A PREDETERMINED TEMPERATURE SO THAT, WHEN THE PUMP REACHES SAID TEMPERATURE, IT IS COOLED BY AIR DRAWN THROUGH THE INLET AND CIRCULATED THROUGH THE PUMP.
References Cited (Backward Citations)
US2371339A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-05 | 1970-03-07 | 1970-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-05 | 1974-03-07 | 1974-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-05 | 1978-03-07 | 1978-09-06 | $7700.00 | Window Closed / Lapsed |