US3762777A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for controlling a winch provided with a safety device
Assignee: Poclain SA
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Filing: 1972-03-08
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Granted: 1973-10-02
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Expires: 1992-03-08
Abstract
Abstract This invention relates to the control of a winch connected to a hydraulic motor which comprises two conduits connected, the first to a source of pressurized fluid or to a discharge tank, the second to the tank or to the source, this control comprising a brake provided with a control member selectively connected by a third conduit to the source and to the tank. A calibrated valve is disposed on the conduit, downstream of the connection of the conduit to the delivery of the source. This control is suitable for being adapted to the circuit for adjusting the position of the hook of a crane.
Inventors
- 👤 R Jacob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:37
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/38; F16H61/40; F16H61/4157; B; B66; B66D; B66D1/00; B66D1/02; B66D1/08; B66D5/00; B66D5/02; B66D5/24; B66D5/26; F15; F15B; F15B13/00; F15B13/01; F16H61/4035; B66D2700/00; B66D2700/01; B66D2700/0125; B66D2700/0133; B66D2700/03; B66D2700/035; F16H63/00; F16H63/02; F16H63/30; F16H63/3023; F16H63/3026; F16H2063/3033
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
118 words
Device for controlling a winch coupled with a hydraulic drive motor, which comprises at least a two way distributor, a discharge tank, a source of supply of pressurized fluid operatively connected between said distributor and said discharge tank, two conduits connected to said distributor for selective connection thereby between said discharge tank and said source of pressurized fluid, a third conduit operatively connected to said source of pressurized fluid and said distributor, a safety brake having a control member selectively connected by said third conduit to said source of pressurized fluid and to said discharge tank, and a calibrated valve interposed in said conduit downstream of the connection of said third conduit with said source of pressurized fluid.
Claim 2
Dependent Claim
118 words
Device for controlling a winch coupled with a hydraulic drive motor, which comprises at least a two way distributor, a discharge tank, a source of supply of pressurized fluid operatively connected between said distributor and said discharge tank, two conduits connected to said distributor for selective connection thereby between said discharge tank and said source of pressurized fluid, a third conduit operatively connected to said source of pressurized fluid and said distributor, a safety brake having a control member selectively connected by said third conduit to said source of pressurized fluid and to said discharge tank, and a calibrated valve interposed in said conduit downstream of the connection of said third conduit with said source of pressurized fluid.
Claim 3
Dependent Claim
50 words
Control device according to claim 1, wherein with said distributor in one position thereof, during turning of the winch, the opening of said valve is controlled as a function of the Pressure of the fluid contained in that part of the first conduit located downstream of said source of fluid.
Claim 4
Dependent Claim
32 words
Control device according to claim 1, wherein said valve comprises a limiter having a passage section which is adjustable as a function of movement of a slide forming part of the valve.
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) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |