US3643922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for the control of the shift movements of a floating body
Assignee: IND NV
•
Filing: 1969-06-30
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Granted: 1972-02-22
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Expires: 1989-06-30
Abstract
Abstract A suction dredger comprising a floating body carrying a suction pipe having a rotatably driven cutter at the lower end thereof and hydraulically operated winches to haul and veer the suction pipe, is characterized by means to limit the braking action on the veering winch when the other winch is hauling, and to increase the braking action on the veering winch when the load on the hauling winch decreases below a predetermined value. In the case of hydraulically operated winches, this is done by providing throttle valves in the fluid circuits of the winches, with each throttle valve responsive to the pressure in the high-pressure branch of the circuit of the other winch.
Inventors
- 👤 Franciscus Henricus Van Linde
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:08
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/88; E02F3/90; E02F3/907; E02F9/00; E02F9/06; E02F9/062
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
123 words
In a suction dredge having veering and hauling winches, a hydraulic motor for each winch, each hydraulic motor having a hydraulic circuit having a high-pressure branch to drive the motor; the improvement comprising a separate throttle valve in each said hydraulic circuit, and means responsive to the pressure in each high-pressure branch to control the throttle valve in the other hydraulic circuit such that a decrease in the pressure in either high-pressure branch closes the throttle valve in the other hydraulic circuit to apply braking action to the motor of said other circuit and an increase in the pressure in either high-pressure branch opens the throttle valve in the other hydraulic circuit to decrease braking action on the motor of said other circuit.
Claim 2
Dependent Claim
123 words
In a suction dredge having veering and hauling winches, a hydraulic motor for each winch, each hydraulic motor having a hydraulic circuit having a high-pressure branch to drive the motor; the improvement comprising a separate throttle valve in each said hydraulic circuit, and means responsive to the pressure in each high-pressure branch to control the throttle valve in the other hydraulic circuit such that a decrease in the pressure in either high-pressure branch closes the throttle valve in the other hydraulic circuit to apply braking action to the motor of said other circuit and an increase in the pressure in either high-pressure branch opens the throttle valve in the other hydraulic circuit to decrease braking action on the motor of said other circuit.
Claim 3
Dependent Claim
77 words
In a suction dredge as claimed in claim 1, a control valve in each hydraulic circuit for reversing the associated hydraulic motor, each said hydraulic circuit having a low-pressure branch which upon reversal of the associated hydraulic motor becomes subjected to high pressure, and a selection valve connected between said low-pressure branch and the associated said throttle valve to open said associated throttle valve when pressure is increased in said low-pressure branch upon reversal of said motor.
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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) | 1975-02-21 | 1975-08-23 | 1976-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-21 | 1979-08-23 | 1980-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-21 | 1983-08-23 | 1984-02-22 | $7700.00 | Window Closed / Lapsed |