GB751004A - Improvements in or relating to hydraulic mechanisms - Google Patents

Improvements in or relating to hydraulic mechanisms

Info

Publication number
GB751004A
GB751004A GB3867/53A GB386753A GB751004A GB 751004 A GB751004 A GB 751004A GB 3867/53 A GB3867/53 A GB 3867/53A GB 386753 A GB386753 A GB 386753A GB 751004 A GB751004 A GB 751004A
Authority
GB
United Kingdom
Prior art keywords
jack
jacks
liquid
valve
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
GB3867/53A
Inventor
Allan Ashley
Edward Cecil Houghton
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.)
Vinters Armstrongs Ltd
Vinters Armstrongs Engineers Ltd
Original Assignee
Vickers Armstrongs Engineers Ltd
Vickers Armstrongs 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 Vickers Armstrongs Engineers Ltd, Vickers Armstrongs Ltd filed Critical Vickers Armstrongs Engineers Ltd
Priority to GB3867/53A priority Critical patent/GB751004A/en
Priority to FR1101665D priority patent/FR1101665A/en
Priority to US409451A priority patent/US2765626A/en
Publication of GB751004A publication Critical patent/GB751004A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
    • F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
    • F23R3/02—Continuous combustion chambers using liquid or gaseous fuel characterised by the air-flow or gas-flow configuration
    • F23R3/04—Air inlet arrangements
    • F23R3/10—Air inlet arrangements for primary air
    • F23R3/12—Air inlet arrangements for primary air inducing a vortex
    • 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
    • B30B15/24—Control arrangements for fluid-driven presses controlling the movement of a plurality of actuating members to maintain parallel movement of the platen or press beam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/10—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks
    • B66F7/16—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks by one or more hydraulic or pneumatic jacks
    • B66F7/20—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks by one or more hydraulic or pneumatic jacks by several jacks with means for maintaining the platforms horizontal during movement
    • 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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F15B11/22—Synchronisation of the movement of two or more servomotors

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Press Drives And Press Lines (AREA)
  • Types And Forms Of Lifts (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

751,004. Hydraulic presses. VICKERSARMSTRONGS (ENGINEERS), Ltd. Feb. 8, 1954 [Feb. 11, 1953], No. 3867/53. Class 69 (2). In a press in which the slide 4 is moved towards the bed 1 by two jacks 5, 8, the jack 5 being connected to a supply 45 of pressure liquid and the jack 8 being operated by the liquid displaced from. the underside of the piston of the jack 5, if one end of the slide engages the work before the other end a compensating piston 63 carried by the ram of the jack 5 is operated by the difference in pressure in the jacks and equalizes the load between the two jacks. A pipe 67 connects the jacks. The slide is raised by pull-back jacks 6, 7. A pump 23 driven by an electric motor 25 delivers liquid to a port 29 of a four-way valve 30 having a plunger 33. Solenoid-operated valves 54, 56 admit liquid to the ends of the valve body to-move the plunger. This liquid is supplied from a pilot system 55 delivering low-pressure liquid by means of a secondary pump 57. A check and holding valve 44 prevents the exhausting of liquid from the pull-back jacks 6, 7 when the pressure in the jack 5 is low, and also ensures that liquid flows from jacks 6, 7 at a controlled rate when liquid is pumped to the main jacks. When the pressure in the jack 5 rises to overcome the load, the valve 44 ensures that back pressure is relieved from the jacks 6, 7. The upper part of the jack 5 is connected by a pipe to a discharge valve 68 and through a pipe 69 to a tank. When the pull-back jack 7 is near the top of its stroke, it operates a slow-down valve 70 and a top limit switch 77 which de-energizes the valve 54 and the plunger 33 returns to its central position. A replenishing valve 73 opened by the jack 7 permits charging or venting of the pipe 67 via the pilot system 55. Limit switches actuated by the slide, or pressure switches 78 may control the energizing of the solenoids of valves 54, 56. In a modification, the pull-back jacks are omitted and the jack 8 is of conventional piston and cylinder form, the underside of the piston being connected to the underside of the piston of the jack 5 so that liquid supplied beneath the pistons will raise the slide. A relief valve 28 is provided. Specification 751,005 is referred to.
GB3867/53A 1953-02-11 1953-02-11 Improvements in or relating to hydraulic mechanisms Expired GB751004A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB3867/53A GB751004A (en) 1953-02-11 1953-02-11 Improvements in or relating to hydraulic mechanisms
FR1101665D FR1101665A (en) 1953-02-11 1954-02-10 Improvements in hydraulic mechanisms
US409451A US2765626A (en) 1953-02-11 1954-02-10 Hydraulic mechanisms

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3867/53A GB751004A (en) 1953-02-11 1953-02-11 Improvements in or relating to hydraulic mechanisms

Publications (1)

Publication Number Publication Date
GB751004A true GB751004A (en) 1956-06-27

Family

ID=9766380

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3867/53A Expired GB751004A (en) 1953-02-11 1953-02-11 Improvements in or relating to hydraulic mechanisms

Country Status (3)

Country Link
US (1) US2765626A (en)
FR (1) FR1101665A (en)
GB (1) GB751004A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3096708A (en) * 1955-03-08 1963-07-09 Samuel M Langston Co Machines for performing operations on sheet materials
US3062132A (en) * 1960-03-21 1962-11-06 Cleveland Crane Eng Hydraulic press brake
US4976336A (en) * 1988-09-13 1990-12-11 Derlan Manufacturing Inc. Lifting apparatus and lifting arm assembly for use therein
CN102910554B (en) * 2012-10-25 2015-04-22 杭州天恒机械有限公司 Jack hydraulic circuit with double hoisting loads
CN112628221A (en) * 2020-12-16 2021-04-09 宁波盛德气动液压有限公司 Pneumatic hydraulic element capable of being manually finely adjusted based on feeding degree

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2169113A (en) * 1938-04-29 1939-08-08 Charles F Elmes Engineering Wo Hydraulic bending press
US2286798A (en) * 1940-05-16 1942-06-16 Hydraulic Dev Corp Inc Hydraulic circuit for press brakes
US2462580A (en) * 1945-03-20 1949-02-22 Watson Cyril Daniel Hydraulic valve and hydraulic power device embodying such valves
US2616265A (en) * 1949-08-24 1952-11-04 Robert C Wilson Means for adjusting fluid motor elements to maintain synchronized movement

Also Published As

Publication number Publication date
US2765626A (en) 1956-10-09
FR1101665A (en) 1955-10-10

Similar Documents

Publication Publication Date Title
US2192778A (en) Drawing press
US2302132A (en) Balancing press platen
US4229965A (en) Hydraulic circuit of a hydromechanical drawing press
GB1491237A (en) Presses
US2309983A (en) Multiple cylinder press
GB1214713A (en) Hydraulic fluid valve system
GB751004A (en) Improvements in or relating to hydraulic mechanisms
GB1212072A (en) Hydraulic control circuits
US2305610A (en) Press with die cushion
US2030966A (en) Variable pressure apparatus
US2683966A (en) Hydraulic press
US2790305A (en) Control valves for hydraulic presses
GB770638A (en) Hydraulically operated machine
US1955278A (en) Hydraulic press
US2545246A (en) Main cylinder release and pump bypass valve
US2419235A (en) Control system for hydraulic motors
GB888360A (en) Improvements relating to hydraulic apparatus
GB1365032A (en) Fluidoperable lifting device
JPH0639285U (en) Hydraulic circuit for press
GB534089A (en) Improvements in or relating to hydraulic presses
GB855636A (en) Improvements in or relating to multiple cylinder presses
GB853492A (en) Hydraulic presses
GB953681A (en) Hydraulic clamping apparatus
US2861426A (en) Control valves for hydraulic presses
GB891662A (en) Hydraulic control system for a fluid motor