Patent US3152409A successfully refreshed from Google Patents.
US3152409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dredging equipment
Assignee: PACIFIC COAST ENG CO
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Filing: 1962-07-23
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Granted: 1964-10-13
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Expires: 1982-07-23
Abstract
No abstract record available.
Inventors
- 👤 Charles D Ramsden
- 👤 Russell J Robertson
- 👤 William G Fraser
- 👤 Ole P Erickson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:35
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/88; E02F3/8833; E02F3/8841; E02F3/90; E02F3/905; E02F3/92; E02F3/9212; E02F3/9218; E02F3/9225; E02F3/9231; E02F9/00; E02F9/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
196 words
DREDGING EQUIPMENT COMPRISING A BARGE, A DIGGING LADDER EXTENDING FROM SAID BARGE AND ADAPTED TO BE LOWERED TO A DEPTH BELOW THE SURFACE OF WATER ON WHICH SAID BARGE MAY BE FLOATING, A CENTRIFUGAL TYPE DREDGE PUMP ON SAID BARGE AND HAVING A SUCTION LINE EXTENDING ALONG AND SUPPORTED BY SAID LADDER, A JET PUMP ASSEMBLY CARRIED BY SAID LADDER AND CONNECTING TO SAID SUCTION LINE, SAID JET PUMP ASSEMBLY INCLUDING JET MEANS OF GENERALLY CYLINDRICAL SHAPE FLOW COUPLED TO SAID SUCTION LINE AND INCLUDING AT LEAST ONE JET IN THE WALL THEREOF, A PRESSURE HOUSING AFFIXED TO SAID DIGGING LADDER AND SURROUNDING SAID JET MEANS AND ENCLOSING SAID JET, MEANS ROTATABLY MOUNTING SAID JET MEANS WITH RESPECT TO SAID SURROUNDING PRESSURE HOUSING, ADDITIONAL PUMP MEANS ON SAID BARGE, MEANS DIRECTING THE OUTPUT OF SAID ADDITIONAL PUMP MEANS ALONG SAID LADDER TO SAID PRESSURE HOUSING TO PRESSURE FEED SAID JET, A CUTTER HEAD AND MEANS COUPLING THE SAME TO THE OUTBOARD END OF SAID JET MEANS, MEANS FOR ROTATING SAID SUCTION LINE AND JET MEANS TO ROTATE SAID CUTTER HEAD WITHOUT INTERRUPTING THE FUNCTIONING OF SAID JET PUMP, AND MEANS FOR RAISING AND LOWERING SAID LADDER.
Claim 2
Dependent Claim
196 words
DREDGING EQUIPMENT COMPRISING A BARGE, A DIGGING LADDER EXTENDING FROM SAID BARGE AND ADAPTED TO BE LOWERED TO A DEPTH BELOW THE SURFACE OF WATER ON WHICH SAID BARGE MAY BE FLOATING, A CENTRIFUGAL TYPE DREDGE PUMP ON SAID BARGE AND HAVING A SUCTION LINE EXTENDING ALONG AND SUPPORTED BY SAID LADDER, A JET PUMP ASSEMBLY CARRIED BY SAID LADDER AND CONNECTING TO SAID SUCTION LINE, SAID JET PUMP ASSEMBLY INCLUDING JET MEANS OF GENERALLY CYLINDRICAL SHAPE FLOW COUPLED TO SAID SUCTION LINE AND INCLUDING AT LEAST ONE JET IN THE WALL THEREOF, A PRESSURE HOUSING AFFIXED TO SAID DIGGING LADDER AND SURROUNDING SAID JET MEANS AND ENCLOSING SAID JET, MEANS ROTATABLY MOUNTING SAID JET MEANS WITH RESPECT TO SAID SURROUNDING PRESSURE HOUSING, ADDITIONAL PUMP MEANS ON SAID BARGE, MEANS DIRECTING THE OUTPUT OF SAID ADDITIONAL PUMP MEANS ALONG SAID LADDER TO SAID PRESSURE HOUSING TO PRESSURE FEED SAID JET, A CUTTER HEAD AND MEANS COUPLING THE SAME TO THE OUTBOARD END OF SAID JET MEANS, MEANS FOR ROTATING SAID SUCTION LINE AND JET MEANS TO ROTATE SAID CUTTER HEAD WITHOUT INTERRUPTING THE FUNCTIONING OF SAID JET PUMP, AND MEANS FOR RAISING AND LOWERING SAID LADDER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-13 | 1968-04-13 | 1968-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-13 | 1972-04-13 | 1972-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-13 | 1976-04-13 | 1976-10-13 | $7700.00 | Window Closed / Lapsed |