GB1381244A - Hydraulic jack with internal mechanical locking means and means to indicate that locking has occurred - Google Patents

Hydraulic jack with internal mechanical locking means and means to indicate that locking has occurred

Info

Publication number
GB1381244A
GB1381244A GB598873A GB598873A GB1381244A GB 1381244 A GB1381244 A GB 1381244A GB 598873 A GB598873 A GB 598873A GB 598873 A GB598873 A GB 598873A GB 1381244 A GB1381244 A GB 1381244A
Authority
GB
United Kingdom
Prior art keywords
piston
locking
claws
jack
head
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.)
Expired
Application number
GB598873A
Inventor
R Lucien
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.)
Messier Hispano SA
Original Assignee
Messier Hispano SA
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 Messier Hispano SA filed Critical Messier Hispano SA
Publication of GB1381244A publication Critical patent/GB1381244A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/26—Locking mechanisms
    • F15B15/261—Locking mechanisms using positive interengagement, e.g. balls and grooves, for locking in the end positions

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)
  • Accommodation For Nursing Or Treatment Tables (AREA)

Abstract

1381244 Locking hydraulic jacks MESSIERHISPANO 7 Feb 1973 [8 Feb 1972] 5988/73 Heading F1D A hydraulic jack, 1, 3, 4, Fig. 1, is locked in the retracted position by claws 12 which engage a head 11 on the piston and are held in engagement by a locking piston 13 carrying a target 23 which comes to rest opposite a proximity detector 22 so that a signal is produced when the piston is locked. To unlock the piston and extend the jack fluid is admitted through a port 7 to push an unlocking piston 17 to the right. A stop 21 on the piston 17 pushes the locking piston 13 to the right against a spring 14. This releases claws 12 and the head 11 is pushed out from between the claws by the hydraulic liquid. When the jack is retracting, the pistons 13 and 17 are arrested by the claws 12 until the head 11 has been engaged. The spring 14, which has been compressed by the continuing movement to the left of the piston head 11, now pushes pistons 13 and 17 into the locking position. Figs. 2 and 3 (not shown) illustrate jacks with similar locking devices provided in the extended position of the jack and in both retracted and extended positions.
GB598873A 1972-02-08 1973-02-07 Hydraulic jack with internal mechanical locking means and means to indicate that locking has occurred Expired GB1381244A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7204193A FR2170922B1 (en) 1972-02-08 1972-02-08

Publications (1)

Publication Number Publication Date
GB1381244A true GB1381244A (en) 1975-01-22

Family

ID=9093169

Family Applications (1)

Application Number Title Priority Date Filing Date
GB598873A Expired GB1381244A (en) 1972-02-08 1973-02-07 Hydraulic jack with internal mechanical locking means and means to indicate that locking has occurred

Country Status (5)

Country Link
DE (1) DE2305688A1 (en)
FR (1) FR2170922B1 (en)
GB (1) GB1381244A (en)
IT (1) IT978690B (en)
SE (1) SE376405B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114313228A (en) * 2021-12-23 2022-04-12 中国航空工业集团公司金城南京机电液压工程研究中心 Mechanical locking device for external hydraulic actuator cylinder

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK150225C (en) * 1984-05-30 1987-07-06 Niels Hvilsted HYDRAULIC CYLINDER EQUIPPED TO RECOVER AT LEAST ONE ELECTRIC POSITIONER
DE29920657U1 (en) 1999-11-24 2000-02-24 Bümach Engineering International B.V., Emmen End position transmitter for pneumatic or hydraulic working cylinders with end position locking

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114313228A (en) * 2021-12-23 2022-04-12 中国航空工业集团公司金城南京机电液压工程研究中心 Mechanical locking device for external hydraulic actuator cylinder
CN114313228B (en) * 2021-12-23 2023-05-30 中国航空工业集团公司金城南京机电液压工程研究中心 External hydraulic actuator mechanical locking device

Also Published As

Publication number Publication date
FR2170922B1 (en) 1975-03-21
IT978690B (en) 1974-09-20
SE376405B (en) 1975-05-26
DE2305688A1 (en) 1973-08-16
FR2170922A1 (en) 1973-09-21

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee