FR2231910A1 - Control valve for hydraulic jack of crane jib - has piston operated by low pressure oil to control main oil flow - Google Patents

Control valve for hydraulic jack of crane jib - has piston operated by low pressure oil to control main oil flow

Info

Publication number
FR2231910A1
FR2231910A1 FR7320234A FR7320234A FR2231910A1 FR 2231910 A1 FR2231910 A1 FR 2231910A1 FR 7320234 A FR7320234 A FR 7320234A FR 7320234 A FR7320234 A FR 7320234A FR 2231910 A1 FR2231910 A1 FR 2231910A1
Authority
FR
France
Prior art keywords
control
hydraulic jack
low pressure
control valve
valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR7320234A
Other languages
French (fr)
Other versions
FR2231910B1 (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GRIFFET ETS M
Original Assignee
GRIFFET ETS M
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by GRIFFET ETS M filed Critical GRIFFET ETS M
Priority to FR7320234A priority Critical patent/FR2231910A1/en
Priority to IT2544673A priority patent/IT989217B/en
Priority to ES415981A priority patent/ES415981A1/en
Publication of FR2231910A1 publication Critical patent/FR2231910A1/en
Application granted granted Critical
Publication of FR2231910B1 publication Critical patent/FR2231910B1/fr
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/18—Control systems or devices
    • 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
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/01—Locking-valves or other detent i.e. load-holding devices
    • 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
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/01—Locking-valves or other detent i.e. load-holding devices
    • F15B13/015—Locking-valves or other detent i.e. load-holding devices using an enclosed pilot flow valve

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Fluid-Driven Valves (AREA)
  • Multiple-Way Valves (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

Control valve to regulate rate of descent of crane jibs. The device comprises a chamber in which a piston slides, subject to the effect of control fluid pressure, and a second chamber open to the main hydraulic oil pressurised by the weight of the jib or its load. Oil passes through the second chamber and out via an exit passage, subject to the position of a valve. A shaft attached to the control piston passes through the separating wall between the two chambers. When the piston is moved by the control fluid pressure the valve is moved from its seat, permitting oil to escape from beneath the shaft of the hydraulic jack, smoothly lowering the jib.
FR7320234A 1973-06-04 1973-06-04 Control valve for hydraulic jack of crane jib - has piston operated by low pressure oil to control main oil flow Granted FR2231910A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR7320234A FR2231910A1 (en) 1973-06-04 1973-06-04 Control valve for hydraulic jack of crane jib - has piston operated by low pressure oil to control main oil flow
IT2544673A IT989217B (en) 1973-06-04 1973-06-15 SEPARATE PILOTAGE VALVE DEVICE PARTICULARLY FOR THE CONTROL OF LIFTING EQUIPMENT AND SIMILAR
ES415981A ES415981A1 (en) 1973-06-04 1973-06-16 Improvements introduced in a separate control valve device for arms of load handling machines. (Machine-translation by Google Translate, not legally binding)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7320234A FR2231910A1 (en) 1973-06-04 1973-06-04 Control valve for hydraulic jack of crane jib - has piston operated by low pressure oil to control main oil flow

Publications (2)

Publication Number Publication Date
FR2231910A1 true FR2231910A1 (en) 1974-12-27
FR2231910B1 FR2231910B1 (en) 1976-06-11

Family

ID=9120466

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7320234A Granted FR2231910A1 (en) 1973-06-04 1973-06-04 Control valve for hydraulic jack of crane jib - has piston operated by low pressure oil to control main oil flow

Country Status (3)

Country Link
ES (1) ES415981A1 (en)
FR (1) FR2231910A1 (en)
IT (1) IT989217B (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2642337A1 (en) * 1976-09-21 1978-03-30 Danfoss As CONTROL DEVICE FOR A HYDRAULIC MOTOR
EP0019597A2 (en) * 1979-05-18 1980-11-26 CHS GIUSEPPE CINOTTO HYDRAULIC SYSTEM S.p.A. Safety device for hydraulic circuits
US4258610A (en) * 1977-08-06 1981-03-31 Robert Bosch Gmbh Control apparatus for a hydraulic power consumer
US4259986A (en) * 1977-08-06 1981-04-07 Robert Bosch Gmbh Control apparatus for a hydraulic power consumer
FR2473584A1 (en) * 1980-01-14 1981-07-17 Missioux Jean Leon Safety interlock for crane operated mechanical grabs - has jacks with associated valve caps for protection and operated by electromagnetic valve with switch near operator
FR2485104A1 (en) * 1980-03-31 1981-12-24 Meca Ind Ind Agricoles Atel Winch hydraulic motor safety valve - has additional fluid return passage opened to start motor turning slowly without shocks
EP0659680A1 (en) * 1993-11-26 1995-06-28 Dana Corporation Relief valve with hydraulic fuse

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1240350A (en) * 1958-11-14 1960-09-02 Thomson Houston Comp Francaise Improvements to turbine valves
FR1327214A (en) * 1962-04-05 1963-05-17 Applic Mach Motrices Automatic safety controls by double pressure pump
DE1550454A1 (en) * 1966-08-11 1969-10-09 Parker Hannifin Corp Flow control valve, especially for a pressure medium motor
FR2062158A5 (en) * 1969-08-28 1971-06-25 Bosch

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1240350A (en) * 1958-11-14 1960-09-02 Thomson Houston Comp Francaise Improvements to turbine valves
FR1327214A (en) * 1962-04-05 1963-05-17 Applic Mach Motrices Automatic safety controls by double pressure pump
DE1550454A1 (en) * 1966-08-11 1969-10-09 Parker Hannifin Corp Flow control valve, especially for a pressure medium motor
FR2062158A5 (en) * 1969-08-28 1971-06-25 Bosch

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2642337A1 (en) * 1976-09-21 1978-03-30 Danfoss As CONTROL DEVICE FOR A HYDRAULIC MOTOR
US4258610A (en) * 1977-08-06 1981-03-31 Robert Bosch Gmbh Control apparatus for a hydraulic power consumer
US4259986A (en) * 1977-08-06 1981-04-07 Robert Bosch Gmbh Control apparatus for a hydraulic power consumer
EP0019597A2 (en) * 1979-05-18 1980-11-26 CHS GIUSEPPE CINOTTO HYDRAULIC SYSTEM S.p.A. Safety device for hydraulic circuits
EP0019597A3 (en) * 1979-05-18 1981-04-22 CHS GIUSEPPE CINOTTO HYDRAULIC SYSTEM S.p.A. Safety device for hydraulic circuits
FR2473584A1 (en) * 1980-01-14 1981-07-17 Missioux Jean Leon Safety interlock for crane operated mechanical grabs - has jacks with associated valve caps for protection and operated by electromagnetic valve with switch near operator
FR2485104A1 (en) * 1980-03-31 1981-12-24 Meca Ind Ind Agricoles Atel Winch hydraulic motor safety valve - has additional fluid return passage opened to start motor turning slowly without shocks
EP0659680A1 (en) * 1993-11-26 1995-06-28 Dana Corporation Relief valve with hydraulic fuse

Also Published As

Publication number Publication date
FR2231910B1 (en) 1976-06-11
IT989217B (en) 1975-05-20
ES415981A1 (en) 1976-05-16

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Legal Events

Date Code Title Description
ST Notification of lapse