GB1425174A - Automatic control of ram-type fluid-pressure operated actuator units - Google Patents

Automatic control of ram-type fluid-pressure operated actuator units

Info

Publication number
GB1425174A
GB1425174A GB2547472A GB2547472A GB1425174A GB 1425174 A GB1425174 A GB 1425174A GB 2547472 A GB2547472 A GB 2547472A GB 2547472 A GB2547472 A GB 2547472A GB 1425174 A GB1425174 A GB 1425174A
Authority
GB
United Kingdom
Prior art keywords
valve
ram
fluid
area
pressure
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
GB2547472A
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.)
Plessey Co Ltd
Original Assignee
Plessey Co Ltd
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 Plessey Co Ltd filed Critical Plessey Co Ltd
Priority to GB2547472A priority Critical patent/GB1425174A/en
Priority to US364157A priority patent/US3916765A/en
Priority to DE19732327705 priority patent/DE2327705A1/en
Publication of GB1425174A publication Critical patent/GB1425174A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L25/00—Drive, or adjustment during the operation, or distribution or expansion valves by non-mechanical means
    • F01L25/02—Drive, or adjustment during the operation, or distribution or expansion valves by non-mechanical means by fluid means
    • F01L25/04—Drive, or adjustment during the operation, or distribution or expansion valves by non-mechanical means by fluid means by working-fluid of machine or engine, e.g. free-piston machine
    • F01L25/06—Arrangements with main and auxiliary valves, at least one of them being fluid-driven

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Control Of Presses (AREA)

Abstract

1425174 Jointing by stamping; riveting PLESSEY CO Ltd 23 May 1973 [31 May 1972 (2)] 25474/72 and 25475/72 Headings B3Q and B3U [Also in Division B5] Hydraulic apparatus for a press tool, for example a riveting or crimping tool, comprises a main and secondary change-over valves 3A, 4 each including a spring 33, 16 to urge a valve element 32 or 14 into a first position, each valve element being moved into a second portion by fluid pressure acting on a small area A of the element, the fluid then acting on a larger area B of the valve element, the valve 3A in its first position supplying fluid to the working chamber 9 of ram 5a, and when at the end of the stroke the pressure rises and through a restrictor 1d acts on the valve to move it into a second position, the valve supplying fluid to the release chamber of the ram, the secondary valve 4 being arranged when the pressure rises in the return chamber at the end of the return stroke to change over and vent the fluid supply to area B of the main valve 3A so that it returns to its first position. Piston 11a of the ram may have a valve 42 leading via bores 45 and 46 to area B of the valve 3A and arranged to open, and thus switch valve 3A, if during the approach stroke of the piston the pressure rises due to an obstacle being encountered. The apparatus may work continuously or be stopped each time the pressure in the line 1c is exhausted.
GB2547472A 1972-05-31 1972-05-31 Automatic control of ram-type fluid-pressure operated actuator units Expired GB1425174A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB2547472A GB1425174A (en) 1972-05-31 1972-05-31 Automatic control of ram-type fluid-pressure operated actuator units
US364157A US3916765A (en) 1972-05-31 1973-05-25 Automatic control of ram-type fluid-pressure operated actuator units
DE19732327705 DE2327705A1 (en) 1972-05-31 1973-05-30 DEVICE FOR CONTROLLING A PRESSURE MEASURING PRESS

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2547472A GB1425174A (en) 1972-05-31 1972-05-31 Automatic control of ram-type fluid-pressure operated actuator units
GB2547572 1972-05-31

Publications (1)

Publication Number Publication Date
GB1425174A true GB1425174A (en) 1976-02-18

Family

ID=26257701

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2547472A Expired GB1425174A (en) 1972-05-31 1972-05-31 Automatic control of ram-type fluid-pressure operated actuator units

Country Status (3)

Country Link
US (1) US3916765A (en)
DE (1) DE2327705A1 (en)
GB (1) GB1425174A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5831483B2 (en) * 1978-08-14 1983-07-06 川崎重工業株式会社 cylinder control device
DE3318618A1 (en) * 1983-05-21 1984-11-22 Massey-Ferguson GmbH, 3440 Eschwege Automatic turning valve actuated by pressure medium, in particular for reversible ploughs, rockers, pumps or the like
EP0136366A1 (en) * 1983-09-30 1985-04-10 Hr Textron Inc. Free piston pump
DE3643671A1 (en) * 1986-12-20 1988-06-30 Ecker Gmbh Maschbau Resetting valve
US6431046B1 (en) 2000-10-25 2002-08-13 Alemite Corporation Pneumatic motor

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1952690A (en) * 1931-10-03 1934-03-27 Racine Stoker Mfg Company Automatic reverse valve for stokers
FR1361466A (en) * 1963-04-09 1964-05-22 Hispano Suiza Sa Improvements to hydraulic control systems with double-acting receiving devices

Also Published As

Publication number Publication date
US3916765A (en) 1975-11-04
DE2327705A1 (en) 1973-12-20

Similar Documents

Publication Publication Date Title
US4288987A (en) Pneumo-hydraulic booster with rapid-traverse feature
DE3781244D1 (en) DRAWING DEVICE FOR A PRESS.
GB1492699A (en) Hydraulically driven hammer system
EP0398959B1 (en) A method for joining two or several overlaying sheet formed members together, metal or non-metal, and an apparatus for carrying out the method
US2770222A (en) Hydraulic system of lathes and other metal working machines, presses, and the like
GB1535876A (en) Hydraulic presses for shearing or punching operations
GB1425174A (en) Automatic control of ram-type fluid-pressure operated actuator units
US2642138A (en) Hydraulically actuated press
GB1007090A (en) A method and apparatus for cutting or stamping blanks from sheet material
GB1485245A (en) Punching presses
HU185642B (en) Penumatically controlled pressure converter for operating hydraulic work devices
GB1153208A (en) Improvements in or relating to Punching Machines
DE3781099D1 (en) DRAWING DEVICE FOR A PRESS.
GB1098197A (en) Improvements in hydraulic presses
GB939951A (en) Improvements relating to booster-assisted hydraulic systems
GB1497938A (en) Punching presses
GB1357749A (en) Fastener driving tool
US2986057A (en) High pressure hydraulic piercing cylinder with integral booster and stripping means
US4742704A (en) Hydraulic jewelry press
GB1308641A (en) Presses
US4192414A (en) Hydraulic press tool protection arrangement
DE3371269D1 (en) Portable hydraulic tools, e.g. hydraulic secateurs, and process for returning their piston cylinder
US4244274A (en) Cylinder control device of hydraulic cylinder apparatus
US1904864A (en) Material working apparatus
GB1362042A (en) Control device for a fluid-operated jack

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]