US3565550A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compressor and pump combination
Assignee: Studebaker Worthington Inc
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Filing: 1968-12-10
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Granted: 1971-02-23
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Expires: 1988-12-10
Abstract
Abstract A SLIDING VANE ROTARY DEVICE WHICH PERFORMS SIMULTANEOUSLY AS A GAS COMPRESSOR AND AN A HYDRAULIC PUMP HAVING SEPARATE INLETS AND OUTLETS FOR THE GAS BEING COMPRESSED AND THE LIQUID BEING PUMPED. IN ADDITION, THE UNIT END PLATE HAS GROOVES FORMED THEREIN COMMUNICATING WITH THE INLET AND OUTLET PORTS WHICH FUNCTION AS INTERNAL FLOW PASSAGES FOR THE GAS BEING COMPRESSED AND THE LIQUID BEING PUMPED.
Inventors
- 👤 Friedrich O Bellmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:24
CPC Classifications
F; F04; F04C; F04C11/00; F04C11/005; F04C11/006
Claims Analysis
Total Claims: 0
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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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |