FR2248229A1 - Hydraulic winch safety device - has adjustable spring-loaded throttle in fluid return passage used when lowering - Google Patents

Hydraulic winch safety device - has adjustable spring-loaded throttle in fluid return passage used when lowering

Info

Publication number
FR2248229A1
FR2248229A1 FR7337073A FR7337073A FR2248229A1 FR 2248229 A1 FR2248229 A1 FR 2248229A1 FR 7337073 A FR7337073 A FR 7337073A FR 7337073 A FR7337073 A FR 7337073A FR 2248229 A1 FR2248229 A1 FR 2248229A1
Authority
FR
France
Prior art keywords
lowering
return passage
control
safety device
adjustable spring
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
FR7337073A
Other languages
French (fr)
Other versions
FR2248229B1 (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.)
SAMIIA
Original Assignee
SAMIIA
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 SAMIIA filed Critical SAMIIA
Priority to FR7337073A priority Critical patent/FR2248229A1/en
Publication of FR2248229A1 publication Critical patent/FR2248229A1/en
Application granted granted Critical
Publication of FR2248229B1 publication Critical patent/FR2248229B1/fr
Granted legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • B66D1/54—Safety gear
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

The winch motor is supplied by a reversing control via the control unit, through separate feed passages for hoisting and lowering, while there are separate return passages through the reversing control for hoisting and lowering. The lowering return passage incorporates an annular variable throttling orifice round the head of a control slide (2). The slide is subjected to the action of a spring (3), and the force exerted by teh fluid in the lowering supply passage. The reversing control can include a piston coming into contact at one end with the end of the control slide opposite to that against which the spring acts, while the other end is subjected to fluid pressure in the lowering supply passage.
FR7337073A 1973-10-17 1973-10-17 Hydraulic winch safety device - has adjustable spring-loaded throttle in fluid return passage used when lowering Granted FR2248229A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7337073A FR2248229A1 (en) 1973-10-17 1973-10-17 Hydraulic winch safety device - has adjustable spring-loaded throttle in fluid return passage used when lowering

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7337073A FR2248229A1 (en) 1973-10-17 1973-10-17 Hydraulic winch safety device - has adjustable spring-loaded throttle in fluid return passage used when lowering

Publications (2)

Publication Number Publication Date
FR2248229A1 true FR2248229A1 (en) 1975-05-16
FR2248229B1 FR2248229B1 (en) 1976-11-19

Family

ID=9126542

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7337073A Granted FR2248229A1 (en) 1973-10-17 1973-10-17 Hydraulic winch safety device - has adjustable spring-loaded throttle in fluid return passage used when lowering

Country Status (1)

Country Link
FR (1) FR2248229A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2467284A1 (en) * 1979-10-10 1981-04-17 Rexroth Sigma Hydraulic motor control circuit - has distributor valve combined with brake applied when in neutral
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
EP0377898A1 (en) * 1989-01-07 1990-07-18 Montanhydraulik GmbH Single-stage actuator with a piston rod locking device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2467284A1 (en) * 1979-10-10 1981-04-17 Rexroth Sigma Hydraulic motor control circuit - has distributor valve combined with brake applied when in neutral
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
EP0377898A1 (en) * 1989-01-07 1990-07-18 Montanhydraulik GmbH Single-stage actuator with a piston rod locking device

Also Published As

Publication number Publication date
FR2248229B1 (en) 1976-11-19

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Legal Events

Date Code Title Description
ST Notification of lapse