Patent US3560121A successfully refreshed from Google Patents.
US3560121A
Expired / Lapsed
US
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Gear pump with movable element having contiguous cyclic unloading suppression means
Assignee: Colt Industries Operating Corp
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Filing: 1969-02-28
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Granted: 1971-02-02
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Expires: 1989-02-28
Abstract
Abstract A GEAR PUMP HAVING FIRST AND SECOND INTERMESHING GEARS CAPABLE OF PUMPING FLUIDS CONTAINING HIGHLY ABRASIVE CONTAMINANTS, SEPARATE PIVOTALLY MOVABLE ELEMENTS ENGAGING THE PERIPHERY OF SAID FIRST AND SECOND GEARS RESPECTIVELY ADJACENT THE PUMP DISCHARGE SUCH THAT HIGH PRESSURE IS INTRODUCED INTO THE GEAR TOOTH INTERTICES NEXT TO THE INNERMOST GEAR TEETH PRIOR TO THE DISENGAGEMENT OF SAID GEAR TEETH TO THEREBY MAINTAIN CONTINUOUS PERIPHERIAL SEALING ENGAGEMENT OF THE OUTBOARD EXTREMITY OF EACH MOVABLE ELEMENT UNDER ALL PUMP OPERATING CONDITIONS.
Inventors
- 👤 Godwin L Noell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:55
CPC Classifications
F; F04; F04C; F04C15/00; F04C15/0003; F04C15/0007; F04C15/0019
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 |