US3560119A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid pump or motor
Assignee: Mannesmann Demag Krauss Maffei GmbH
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Filing: 1968-12-18
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Granted: 1971-02-02
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Expires: 1988-12-18
Abstract
Abstract TWO RELATIVELY DISPLACEABLE MEMBERS ARE FORMED WITH AT LEAST TWO INTERFITTING SPIROIDAL PERIPHERAL WALL ELEMENTS OR LIKE PITCH, ANGULARLY AND RADIALLY OFFSET TO CONTACT ONE ANOTHER ALONG AT LEAST ONE PAIR OF DIAMETRICALLY OPPOSITE LOCATING SIMULTANEOUSLY, DEFINING TOGETHER WITH ADJOINING SIDEWALLS ONE OR MORE PAIRS OF CHAMBERS OF PROGRESSIVELY VARYING VOLUME UPON A RELATIVE ORBITING OF THEIR CENTERS WITH SUBSTANTIALLY MAINTENANCE OF THEIR RELATIVE ANGULAR ORIENTATION WHEREBY THE POINTS OF CONTACT SHIFT ALONG THEIR PERIPHERIES, ALTERNATELY OPENING EACH CHAMBER TOWARD AN OUTER AND AN INNER PORT.
Inventors
- 👤 Werner Busch
- 👤 Paul Hufnagel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:00
CPC Classifications
F; F01; F01C; F01C1/00; F01C1/02; F01C1/0207; F01C1/0215; F01C1/0223; F01C21/00; F01C21/008
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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |