US4311066A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reduction gear and speed control for dredge pumps
Assignee: Vodafone GmbH
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Filing: 1979-12-21
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Granted: 1982-01-19
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Expires: 1999-12-21
Abstract
Abstract A high-speed drive shaft is connected to dredge pump shaft by a planetary gear, upon which a controlled speed is superposed, by branching power off the high-speed shaft for driving an auxiliary adjustable pump which, in turn, runs a hydrostatic motor whose rotary output is connected to the ring gear of the planetary gear via a transmission which includes two brakes and a speed-responsive clutch; one brake is also speed-responsive, the other one is responsive to motor pressure, to provide a possibly redundant system for preventing torque transmission to the motor, e.g., in case of dredge pump blockage.
Inventors
- 👤 Bernd Schuhmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:15
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/88; E02F3/90
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
169 words
A reducing gear with supervisory and speed control systems, and being interposed between a driven input shaft and an output shaft, leading, for example, to a dredge pump, comprising: a planetary gear with sun gear, spider, planet gears journalled on the spider, and an internal ring gear in a ring, the sun gear being connected to the driven input shaft, the spider being connected to the output shaft; an intermediate shaft with a gear, said ring carrying an outer gear, meshing with the gear on the intermediate shaft; a speed-controlled, hydrostatic motor; transmission means for connecting the motor to the intermediate shaft, for driving the shaft at a speed depending upon the speed of the motor; a flow-reversible, adjustable, auxiliary pump; gear means, drivingly connecting said input shaft to said pump; conduit means, interconnecting the pump and the motor so that the pump operates the motor; and brake means included in the transmission means and provided to prevent the planetary gear from driving the motor via the transmission means.
Claim 2
Dependent Claim
169 words
A reducing gear with supervisory and speed control systems, and being interposed between a driven input shaft and an output shaft, leading, for example, to a dredge pump, comprising: a planetary gear with sun gear, spider, planet gears journalled on the spider, and an internal ring gear in a ring, the sun gear being connected to the driven input shaft, the spider being connected to the output shaft; an intermediate shaft with a gear, said ring carrying an outer gear, meshing with the gear on the intermediate shaft; a speed-controlled, hydrostatic motor; transmission means for connecting the motor to the intermediate shaft, for driving the shaft at a speed depending upon the speed of the motor; a flow-reversible, adjustable, auxiliary pump; gear means, drivingly connecting said input shaft to said pump; conduit means, interconnecting the pump and the motor so that the pump operates the motor; and brake means included in the transmission means and provided to prevent the planetary gear from driving the motor via the transmission means.
Claim 3
Dependent Claim
32 words
A gear and system as in claim 1, including means for operating a brake of the brake means in dependence upon a particular speed when occurring, or exceeded, in the transmission means.
Claim 4
Dependent Claim
38 words
A gear and system as in claim 1, wherein the transmission means includes a second intermediate shaft carrying a brake of the brake means, being connected to the motor and being geared to the first mentioned, intermediate shaft.
Claim 5
Dependent Claim
37 words
A gear and system as in claim 1, 2, or 3, said transmission means including a clutch for selectively disconnecting the motor from a driving portion of the transmission means, as connected to the first-mentioned intermediate shaft.
Claim 6
Dependent Claim
32 words
A gear and system as in claim 2 including a speed governor, further including an auxiliary hydraulic circuit connected to be controlled by the speed governor and provided for controlling the brake.
Claim 7
Dependent Claim
38 words
A gear and system as in claim 1, wherein the brake means includes a spring-loaded brake acting on the motor in response to pressure as provided by the auxiliary pump, to brake the motor when the pressure drops.
Claim 8
Dependent Claim
29 words
A gear and system as in claim 3, and including a speed governor and a hydraulic circuit connected to be controlled by the speed governor and controlling said brake.
References Cited (Backward Citations)
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Cited
US3744344A
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US3714846A
Cited
US3796111A
Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-01-18 | 1985-07-20 | 1986-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-18 | 1989-07-20 | 1990-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-18 | 1993-07-20 | 1994-01-19 | $7700.00 | Window Closed / Lapsed |