US3254570A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor
Assignee: New York Air Brake LLC
•
Filing: 1964-03-26
•
Granted: 1966-06-07
•
Expires: 1984-03-26
Abstract
No abstract record available.
Inventors
- 👤 Joseph N Mazur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:43
CPC Classifications
F; F03; F03C; F03C2/00; F03C2/30; F01; F01C; F01C21/00; F01C21/08; F01C21/0809; F01C21/0818; F01C21/0854; F01C21/0863; F03C2/304; F04; F04C; F04C2/00; F04C2/30; F04C2/34; F04C2/344
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
IN A VANE MOTOR INCLUDING INLET AND DISCHARGE PORTS AND A WORKING CHAMBER HAVING INLET AND DISCHARGE ZONES THAT COMMUNICATE RESPECTIVELY WITH THE INLET AN DISCHARGE PORTS, A ROTOR LOCATED IN THE WORKING CHAMBER AND CONTAINING A PLURALITY OF CIRCUMFERENIALLY SPACED SLOTS FOR RECEIVING SLIDING VANES, AND A LOW PRESSURE BIASING PORT WHICH COMMUNICATES WITH THE SPACE IN EACH VANE SLOT BENEATH THE VANE AS THE VANE MOVES THROUGH THE DISCHARGE ZONE, THE IMPROVEMENT WHICH COMPRISES MEANS FOR VENTING TO THE DISCHARGE PORT THE INTERVANE WORKING SPACE BEHIND EACH VANE AS THE VANE APPROACHES THE DISCHARGE ZONE AND BEFORE THE ASSOCIATED VANE SLOT COMMUNICATES WITH THE LOW PRESSURE BIASING PORT.
Claim 2
Dependent Claim
110 words
IN A VANE MOTOR INCLUDING INLET AND DISCHARGE PORTS AND A WORKING CHAMBER HAVING INLET AND DISCHARGE ZONES THAT COMMUNICATE RESPECTIVELY WITH THE INLET AN DISCHARGE PORTS, A ROTOR LOCATED IN THE WORKING CHAMBER AND CONTAINING A PLURALITY OF CIRCUMFERENIALLY SPACED SLOTS FOR RECEIVING SLIDING VANES, AND A LOW PRESSURE BIASING PORT WHICH COMMUNICATES WITH THE SPACE IN EACH VANE SLOT BENEATH THE VANE AS THE VANE MOVES THROUGH THE DISCHARGE ZONE, THE IMPROVEMENT WHICH COMPRISES MEANS FOR VENTING TO THE DISCHARGE PORT THE INTERVANE WORKING SPACE BEHIND EACH VANE AS THE VANE APPROACHES THE DISCHARGE ZONE AND BEFORE THE ASSOCIATED VANE SLOT COMMUNICATES WITH THE LOW PRESSURE BIASING PORT.
References Cited (Backward Citations)
US2141171A
Cited
US2641195A
Cited
US2653551A
Cited
US2809593A
Cited
US3014431A
Cited
US3102494A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-06 | 1969-12-06 | 1970-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-06 | 1973-12-06 | 1974-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-06 | 1977-12-06 | 1978-06-07 | $7700.00 | Window Closed / Lapsed |