GB1206083A - Improvements in or relating to fluid operated jacks - Google Patents

Improvements in or relating to fluid operated jacks

Info

Publication number
GB1206083A
GB1206083A GB07651/69A GB1765169A GB1206083A GB 1206083 A GB1206083 A GB 1206083A GB 07651/69 A GB07651/69 A GB 07651/69A GB 1765169 A GB1765169 A GB 1765169A GB 1206083 A GB1206083 A GB 1206083A
Authority
GB
United Kingdom
Prior art keywords
piston
cylinder
fluid
port
supplied
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
GB07651/69A
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.)
Compagnie des Ateliers et Forges de la Loire SA
Original Assignee
Compagnie des Ateliers et Forges de la Loire 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 Compagnie des Ateliers et Forges de la Loire SA filed Critical Compagnie des Ateliers et Forges de la Loire SA
Publication of GB1206083A publication Critical patent/GB1206083A/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
    • F15B15/204—Control means for piston speed or actuating force without external control, e.g. control valve inside the piston
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/64—Mould opening, closing or clamping devices
    • B29C45/67—Mould opening, closing or clamping devices hydraulic
    • B29C45/6764—Mould opening, closing or clamping devices hydraulic using hydraulically connectable chambers of the clamping cylinder during the mould opening and closing movement
    • B29C45/6771—Mould opening, closing or clamping devices hydraulic using hydraulically connectable chambers of the clamping cylinder during the mould opening and closing movement the connection being provided within the clamping cylinder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/16—Control arrangements for fluid-driven presses
    • B30B15/161—Control arrangements for fluid-driven presses controlling the ram speed and ram pressure, e.g. fast approach speed at low pressure, low pressing speed at high pressure

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)

Abstract

1,206,083. Fluid-pressure jacks. COMPAGNIE DES ATELIERS ET FORGES DE LA LOIRE. April 3, 1969 [April 8, 1968], No.17651/69. Heading F1P. A fluid operated jack comprises a cylinder 4 having end bearings 11 slidably supporting the two diameter piston rod 3 of a piston 5 spaced from the cylinder, the arrangement being such that fluid supplied to the cylinder through a port 8 causes low force movement of the piston 5 until it enters a bore 10, whereafter connection of a port 9 to exhaust results in high force movement. A piston 2 fixed to the rod 3 slides in a second cylinder 1 having a port 7 supplied with fluid to cause a return stroke. During the return stroke fluid is also supplied to the port 9 until the piston 5 leaves the bore 10. In a modification the lefthand portion of piston rod 3 and its piston 2 are omitted and the piston 5 is returned by a further jack connected to the right-hand rod portion. By providing a succession of axially spaced portions in the cylinder 4, equal in diameter to the piston 5, alternate high and low force movements are obtained.
GB07651/69A 1968-04-08 1969-04-03 Improvements in or relating to fluid operated jacks Expired GB1206083A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR147548 1968-04-08

Publications (1)

Publication Number Publication Date
GB1206083A true GB1206083A (en) 1970-09-23

Family

ID=8648781

Family Applications (1)

Application Number Title Priority Date Filing Date
GB07651/69A Expired GB1206083A (en) 1968-04-08 1969-04-03 Improvements in or relating to fluid operated jacks

Country Status (6)

Country Link
BE (1) BE730574A (en)
DE (1) DE1917116C3 (en)
FR (1) FR1583814A (en)
GB (1) GB1206083A (en)
LU (1) LU58321A1 (en)
NL (1) NL6905226A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3149565A1 (en) * 1981-08-05 1983-06-23 Aviatest GmbH, 4000 Düsseldorf Press drive, especially for hydraulically operated coating presses
DE3130931C2 (en) * 1981-08-05 1986-06-19 Aviatest GmbH, 4000 Düsseldorf Hydraulic drive for coating presses with at least one or more idle stroke power stroke cylinders
GB8707967D0 (en) * 1987-04-03 1987-05-07 Hartridge Ltd Leslie Ram for press
DE4104856A1 (en) * 1991-02-16 1991-10-31 Krupp Maschinentechnik DRIVE DEVICE FOR A DEMOLITION TOOL

Also Published As

Publication number Publication date
DE1917116C3 (en) 1980-01-24
NL6905226A (en) 1969-10-10
LU58321A1 (en) 1969-07-15
BE730574A (en) 1969-09-01
DE1917116B2 (en) 1979-05-23
DE1917116A1 (en) 1969-10-23
FR1583814A (en) 1969-12-05

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Legal Events

Date Code Title Description
PS Patent sealed
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PE20 Patent expired after termination of 20 years