US3895564A - Circuit for the control of a winch by fluid under pressure including an unwinding position - Google Patents

Circuit for the control of a winch by fluid under pressure including an unwinding position Download PDF

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Publication number
US3895564A
US3895564A US469687A US46968774A US3895564A US 3895564 A US3895564 A US 3895564A US 469687 A US469687 A US 469687A US 46968774 A US46968774 A US 46968774A US 3895564 A US3895564 A US 3895564A
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Prior art keywords
pipe
valve
fluid
calibrated
piloting
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Expired - Lifetime
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US469687A
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English (en)
Inventor
Claude M Pinson
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Poclain SA
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Poclain SA
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
    • F15B11/042—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the feed line, i.e. "meter in"
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/28—Other constructional details
    • B66D1/40—Control devices
    • B66D1/42—Control devices non-automatic
    • B66D1/44—Control devices non-automatic pneumatic of hydraulic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/2053—Type of pump
    • F15B2211/20538—Type of pump constant capacity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30525—Directional control valves, e.g. 4/3-directional control valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/31—Directional control characterised by the positions of the valve element
    • F15B2211/3105—Neutral or centre positions
    • F15B2211/3111—Neutral or centre positions the pump port being closed in the centre position, e.g. so-called closed centre
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/321—Directional control characterised by the type of actuation mechanically
    • F15B2211/324—Directional control characterised by the type of actuation mechanically manually, e.g. by using a lever or pedal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40507—Flow control characterised by the type of flow control means or valve with constant throttles or orifices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40515—Flow control characterised by the type of flow control means or valve with variable throttles or orifices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/45—Control of bleed-off flow, e.g. control of bypass flow to the return line
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
    • F15B2211/50518—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using pressure relief valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
    • F15B2211/50536—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using unloading valves controlling the supply pressure by diverting fluid to the return line
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
    • F15B2211/50545—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using braking valves to maintain a back pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
    • F15B2211/5151—Pressure control characterised by the connections of the pressure control means in the circuit being connected to a pressure source and a directional control valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
    • F15B2211/5156—Pressure control characterised by the connections of the pressure control means in the circuit being connected to a return line and a directional control valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/55—Pressure control for limiting a pressure up to a maximum pressure, e.g. by using a pressure relief valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/635—Circuits providing pilot pressure to pilot pressure-controlled fluid circuit elements
    • F15B2211/6355—Circuits providing pilot pressure to pilot pressure-controlled fluid circuit elements having valve means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7058—Rotary output members
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S60/00—Power plants
    • Y10S60/905—Winding and reeling

Definitions

  • the invention refers to a circuit for the control of a winch by fluid under pressure including an unwinding [30] Apphcatmn Pnonty Data position.
  • the circuit includes a first calibrated valve May 25, 1973 France 73.19210 arranged in the delivery pipe from the motor of the winch, whilst a second calibrated valve is likewise arranged in the pipe downstream of the valve with re- 60/905 spect to the motor, and a tie-pipe connects the pipe [51] Int. Cl. ..F15B 11/08; F15B 13/04 between the-valves to the feedpipe to the motor, a Field of Search 0/ constriction being arranged in this pipe.
  • a circuit of this kind is applicable to the control of the winch [56] References Cited motor of a trawl.
  • the invention proposes a new circuit suitable for effecting the required paying out but the application of which is not of course limited solely to the control of the unwinding of a trawl winch.
  • the object of the invention is therefore a circuit for the control of a winch by fluid under pressure including an unwinding position, consisting of:
  • a fluid motor having an inlet chamber and an exhaust chamber for the fluid
  • tie-pipe which is connected on the one hand to the delivery pipe downstream of the first calibrated valve with respect to the motor and on the other hand to the feed pipe, and
  • a member for adjustment of the flow of fluid arranged in the tie-pipe.
  • a second calibrated discharge valve is arranged in the delivery pipe downstream of the connection of the tie-pipe to this delivery pipe with respect to the first calibrated discharge valve, the member for adjustment of the flow consisting of a constriction.
  • the circuit further includes:
  • a first regulator having at least two positions, which is arranged in the by-pass pipe and which in its first position blocks at its level the by-pass pipe and in its second position ensures at its level the continuity of the said by-pass pipe,
  • a second regulator having at least two positions, which is arranged in the tie-pipe and which in its first position ensures at its level the continuity of the tiepipe and in its second position blocks at its level the said tie-pipe,
  • first jack and a first retum-member which are coupled to the movable member of the first regulator, the first jack being connected by a first piloting pipe to the source of piloting fluid and having an effect upon the said movable member, which is opposed to that of the first return-member, this latter effect returning the said movable member towards the second position of the first regulator,
  • first-and second piloting pipes have a common portionb y means of which they are connected to the source of piloting fluid and that a third regulator having at least two positions is arranged in this common portion, in its first position ensures at its level the continuity of the common portion, and in its second position puts the first and second piloting pipes in communication with the fluid tank.
  • the non-retum valve It is often of interest to provide a third calibrated valve called the non-retum valve and to arrange it in the delivery-pipe downstream of the second calibrated valve and of the connection to the by-pass" pipe, which is itself located downstream of the said second calibrated valve with respect to the first calibrated valve.
  • the source of piloting fluid consists of the portion of the delivery pipe lying between the second and third calibrated valves.
  • FIG. 1 displays diagrammatically a circuit in accordance with the invention in a first configuration:
  • FIG. 2 displays the circuit as shown in FIG. 1 but in the configuration particular to unwinding of the winch
  • FIG. 3 displays the operational graph of the circuit as shown in FIG. 2 during unwinding of the winch.
  • a pump 1 is connected by its suction pipe 2 to a fluid tank 3 and by a pipe 4 connected to its delivery aperture, to a three-position regulator valve 5 which is provided with a control handle 6.
  • a motor 7 comprising two chambers 8 and 9 is connected to the regulator valve 5 by two pipes 10 and 11, the pipe 10 being connected to the chamber 8 and the pipe 11 being connected to the chamber 9.
  • a flow limiter l2 intended in a manner in itself known to provide the function of limiter of the speed of the motor 7 is arranged in the pipe 11 so as to allow flow of the fluid from the said motor towards the regulator valve 5.
  • this flow limiter 12 has its opening piloted by the pressure of the fluid contained in the pipe 10, that is, by means of a pipe 13 connected to the said pipe 10.
  • a pipe 14 is connected to the pipe 11 on opposite sides of the flow limiter 12, whilst a non-return valve 15 is arranged in the pipe 14 and allows flow of the fluid from the regulator valve 5 towards the motor 7. It may be further observed that the presence of the flow limiter 12 is not indispensable to putting of the invention into effect.
  • a pipe 16 is tapped off from the pipe 4 which it connects to the tank 3.
  • a calibrated discharge valve 17 is in addition arranged in this pipe 16.
  • a pipe 18 likewise connects the regulator valve 5 to the tank 3.
  • Three calibrated valves 19, 20 and 21 are arranged in succession in the pipe 18 starting from the regulator valve 5. The calibration pressures of these valves are in the case in point, distinct.
  • the calibration pressure of the valve 19, for example, is equal to 150 bars and in the example illustrated is higher than the calibration pressure of the valve 20, which is equal to 100 bars.
  • As to the valve 21 it only has to provide a weak retention. Its calibration pressure is therefore low, being of the order of, for example, bars.
  • a tie-pipe 22 connects the portion of the pipe 18 lying between the calibrated valves 19 and to the pipe 4.
  • a constriction 23 is arranged in this tie-pipe 22, as well as a two-position regulator valve 24.
  • a return spring 25 and a jack 26 are coupled to the said regulator 24 and have opposing actions, the spring 25 tending to keep the regulator valve 24 in its second position in which it is furthermore represented in FIG. 1. In its first position, the regulator 24 ensures at its level, continuity of the tie-pipe 22, whereas in its second position it blocks at its level the said pipe 22.
  • a by-pass pipe 27 is connected to the pipe 18, on the one hand between the regulator valve 5 and the first calibrated valve 19 and on the other hand between the second calibrated valve 20 and the third 21.
  • Another two-position regulator valve 28 is arranged in the bypass pipe 27.
  • a return spring 29 and a jack 30 are coupled to the regulator valve 28 and have opposing actions, the spring 29 tending to keep the regulator valve 28 in its second position in which it is furthermore represented in FIG. 1. In its first position the regulator valve 28 blocks at its level the pipe 27 whereas in its second position it ensures at its level, continuity of the said pipe 27.
  • a third two-position regulator valve 31 furnished with a handle 32 is arranged in a pipe 33 connected to the pipe 18 between the second and third calibrated valves 20, 21.
  • Control jack 30 of regulator 28 is connected to one end of a first piloting pipe 34 which has its opposite end connected to a second piloting pipe 35 and to one end of pipe 33 with the other end of the second piloting pipe being connected to jack 26 of regulator 24.
  • the opposite end of pipe 33 is connected to conduit 18 at a location between calibrated valves 20 and 21.
  • pipe 36 provides a flow connection between regulator valve 31 to the tank 3.
  • This regulator valve 31 in its first position ensures continuity at its level, of the pipe 33 and blocks the pipe 36, whereas in its second position (represented in FIG. 1) it interrupts at its level the pipe 33, connecting the portion of this pipe 33 which is connected to the piloting pipes 34 and 35, to the pipe 36.
  • FIG. 2 illustrates the same circuit as FIG. 1 with the elements referenced with the same numerals. The sole difference rests in the fact that the various regulators 5, 24, 28 and 31 have all been put in their respective first positions.
  • the configuration shown in FIG. 2 being of particular interest it appears advisable at this point to make the following remarks proper to this configuration:
  • the aggregate of the pipes 4 and 10 constitutes the feed-pipe to the inlet chamber 8 of the motor 7;
  • the aggregate of the pipes 11 and 18 constitutes the fluid delivery pipe out of the exhaust chamber 9 of the motor 7;
  • tie-pipe 22 effectively connects, without being interrupted, the pipes 18 and 4 whereas with the pipe 27 blocked at regulator 28 the fluid from the pipe 11 can only escape through the first calibrated valve 19.
  • FIG. 3 represents the curves of the variations obtained during operation of the circuit as shown in FIG. 2.
  • N of the motor 7 there are represented the variations in the pressure PA of the feed fluid contained in the pipes 4 and 10, and in the pressure PR of retention of the fluid contained in the portion of the pipe 11 lying between the motor 7 and the flow limiter 12.
  • the pump 1 feeds fluid to the inlet chamber 8 of the motor 7.
  • the complete circuit proposed presents certain other equally interesting characteristics such, especially, as that corresponding with the neutralization of the constriction 23.
  • putting the regulator 31 into its second position will put the jacks 26 and 30 in communication with the pressureless fluid contained in the pipe 36 and in the tank 3.
  • the regulators 24 and 28 will in this way be arranged too in their respective second positions (FIG. 1) in which no fluid can pass through the constriction 23, the delivery of the fluid which has passed through the flow limiter 12 being effected through the pipe 27 in which this fluid should pass through the calibrated valves 19 and 20.
  • a hydraulic circuit for the control of a winch by fluid under pressure, including an unwinding position, comprising:
  • a fluid motor having an inlet chamber and an exhaust chamber for the fluid
  • a delivery pipe having an upstream end connected to the exhaust chamber and a downstream end communicating with the fluid tank
  • a first calibrated discharge valve which is arranged in the delivery pipe
  • a connecting tie-pipe which is connected on one end to the delivery pipe downstream of the first calibrated discharge valve with respect to the motor and is connected on an opposite end to the feed pipe
  • a by-pass pipe by-passing the first and second calibrated valves, which by-pass pipe has one end connected to the delivery pipe at a location between the motor and the first calibrated valve and which has its other end connected to the delivery pipe at a location downstream of the second calibrated valve with respect to the first calibrated valve,
  • a first regulator valve having at least two positions, which is mounted in the by-pass pipe and which in its first position blocks the by-pass pipe and in its second position ensures the continuity of the said by-pass pipe,
  • a second regulator valve having at least two positions, which is arranged in the connecting tie-pipe and which in its first position ensures the continuity of the connecting tie-pipe and in its second position blocks the said tie-pipe,
  • control means including:
  • first jack and a first return member which are coupled to the movable member of the first regulator valve, the first jack being connected by a first piloting pipe to the source of piloting fluid and having an effect upon the said movable member, which is opposed to that of the first return member, this latter effect returning the said movable member towards the second position of the first regulator valve,
  • third regulator valve means having first and second selective positions for connecting said first and second piloting pipes to said source of piloting fluid when in its first position and for connecting said first and second piloting pipes to vent to said fluid tank when in said second position.
  • a circuit as in claim 3, including a third calibrated calibrated valve, the source of piloting fluid comprises valve arranged in the delivery pipe downstream of the the portion of the delivery pipe lying between the second calibrated valve and of the connection to the by-pass pipe, which is itself located downstream of the said second calibrated valve with respect to the first 5 ond calibrated valve and said third calibrated valve.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
US469687A 1973-05-25 1974-05-13 Circuit for the control of a winch by fluid under pressure including an unwinding position Expired - Lifetime US3895564A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7319210A FR2230578B1 (de) 1973-05-25 1973-05-25

Publications (1)

Publication Number Publication Date
US3895564A true US3895564A (en) 1975-07-22

Family

ID=9120050

Family Applications (1)

Application Number Title Priority Date Filing Date
US469687A Expired - Lifetime US3895564A (en) 1973-05-25 1974-05-13 Circuit for the control of a winch by fluid under pressure including an unwinding position

Country Status (10)

Country Link
US (1) US3895564A (de)
JP (1) JPS5020450A (de)
CA (1) CA993762A (de)
DE (1) DE2425112A1 (de)
ES (1) ES426606A1 (de)
FR (1) FR2230578B1 (de)
GB (1) GB1456256A (de)
IT (1) IT1012451B (de)
NO (1) NO741890L (de)
SE (1) SE394655B (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3976333A (en) * 1974-05-14 1976-08-24 Societe Anonyme: Poclain Fluid motor braking system
US3982469A (en) * 1976-01-23 1976-09-28 Caterpillar Tractor Co. Apparatus for controlling work element operating pressures in a fluid system
WO1987000589A1 (en) * 1985-07-15 1987-01-29 Cave Holdings Pty. Ltd. Hydraulic control unit
EP0365341A2 (de) * 1988-10-20 1990-04-25 Dosco Overseas Engineering Limited Automatische Geschwindigkeitsregelung
US20120285152A1 (en) * 2011-05-13 2012-11-15 Kobelco Cranes Co., Ltd. Hydraulic driving apparatus for working machine
US20140130488A1 (en) * 2012-11-13 2014-05-15 Kobelco Cranes Co., Ltd. Hydraulic drive apparatus for work machine
US9528531B2 (en) 2012-11-13 2016-12-27 Kobe Steel, Ltd. Hydraulic drive apparatus for work machine
US20210115949A1 (en) * 2019-10-16 2021-04-22 Caterpillar Inc. Hydraulic system for a work machine having a hydraulic winch

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO163129C (no) * 1977-02-01 1991-05-02 Karmoey Mekaniske Verksted As Anordning til styring av to traalvinsjer.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2082473A (en) * 1933-09-09 1937-06-01 Oilgear Co Hydraulic transmission
US3300969A (en) * 1965-07-06 1967-01-31 Bryant Grinder Corp Cavitation minimizer
US3360304A (en) * 1964-11-09 1967-12-26 Abex Corp Retarder systems

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2082473A (en) * 1933-09-09 1937-06-01 Oilgear Co Hydraulic transmission
US3360304A (en) * 1964-11-09 1967-12-26 Abex Corp Retarder systems
US3300969A (en) * 1965-07-06 1967-01-31 Bryant Grinder Corp Cavitation minimizer

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3976333A (en) * 1974-05-14 1976-08-24 Societe Anonyme: Poclain Fluid motor braking system
US3982469A (en) * 1976-01-23 1976-09-28 Caterpillar Tractor Co. Apparatus for controlling work element operating pressures in a fluid system
WO1987000589A1 (en) * 1985-07-15 1987-01-29 Cave Holdings Pty. Ltd. Hydraulic control unit
EP0365341A2 (de) * 1988-10-20 1990-04-25 Dosco Overseas Engineering Limited Automatische Geschwindigkeitsregelung
EP0365341A3 (de) * 1988-10-20 1990-06-13 Dosco Overseas Engineering Limited Automatische Geschwindigkeitsregelung
US20120285159A1 (en) * 2011-05-13 2012-11-15 Kobelco Cranes Co., Ltd. Hydraulic driving apparatus for working machine
US20120285152A1 (en) * 2011-05-13 2012-11-15 Kobelco Cranes Co., Ltd. Hydraulic driving apparatus for working machine
US9181070B2 (en) * 2011-05-13 2015-11-10 Kabushiki Kaisha Kobe Seiko Sho Hydraulic driving apparatus for working machine
US9187297B2 (en) * 2011-05-13 2015-11-17 Kabushiki Kaisha Kobe Seiko Sho Hydraulic driving apparatus for working machine
US20140130488A1 (en) * 2012-11-13 2014-05-15 Kobelco Cranes Co., Ltd. Hydraulic drive apparatus for work machine
US9528531B2 (en) 2012-11-13 2016-12-27 Kobe Steel, Ltd. Hydraulic drive apparatus for work machine
US9650232B2 (en) * 2012-11-13 2017-05-16 Kobe Steel, Ltd. Hydraulic drive apparatus for work machine
US20210115949A1 (en) * 2019-10-16 2021-04-22 Caterpillar Inc. Hydraulic system for a work machine having a hydraulic winch
US11149755B2 (en) * 2019-10-16 2021-10-19 Caterpillar Inc. Hydraulic system for a work machine having a hydraulic winch

Also Published As

Publication number Publication date
SE7406917L (de) 1974-11-26
NO741890L (no) 1974-11-26
DE2425112A1 (de) 1974-12-12
IT1012451B (it) 1977-03-10
FR2230578B1 (de) 1976-11-12
JPS5020450A (de) 1975-03-04
SE394655B (sv) 1977-07-04
CA993762A (en) 1976-07-27
ES426606A1 (es) 1976-07-16
FR2230578A1 (de) 1974-12-20
GB1456256A (en) 1976-11-24

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