GB1406987A - Hydraulic actuator - Google Patents

Hydraulic actuator

Info

Publication number
GB1406987A
GB1406987A GB3657271A GB3657271A GB1406987A GB 1406987 A GB1406987 A GB 1406987A GB 3657271 A GB3657271 A GB 3657271A GB 3657271 A GB3657271 A GB 3657271A GB 1406987 A GB1406987 A GB 1406987A
Authority
GB
United Kingdom
Prior art keywords
ports
grooves
port
cylinder
needles
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
GB3657271A
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.)
Priestley T P
Original Assignee
Priestley T P
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 Priestley T P filed Critical Priestley T P
Priority to GB3657271A priority Critical patent/GB1406987A/en
Priority to US276369A priority patent/US3913448A/en
Priority to NL7210678A priority patent/NL7210678A/xx
Priority to CH1150972A priority patent/CH557909A/xx
Priority to FR7228234A priority patent/FR2149910A5/fr
Priority to IT197269555A priority patent/IT964884B/en
Priority to DE2238539A priority patent/DE2238539A1/en
Publication of GB1406987A publication Critical patent/GB1406987A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H43/00—Other fluid gearing, e.g. with oscillating input or output
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/94—Driving-gear not otherwise provided for
    • 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
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • 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
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
    • 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
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/02—Servomotor systems with programme control derived from a store or timing device; Control devices therefor
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30505—Non-return valves, i.e. check valves
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30525—Directional control valves, e.g. 4/3-directional control valve
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/3056—Assemblies of multiple valves
    • F15B2211/30585—Assemblies of multiple valves having a single valve for multiple output members
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/321—Directional control characterised by the type of actuation mechanically
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7055—Linear output members having more than two chambers

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Knitting Machines (AREA)

Abstract

1406987 Hydraulic actuators T P PRIESTLEY and J D GARSIDE 3 Aug 1972 [4 Aug 1971] 36572/71 Heading F1D [Also in Division D1] An hydraulic actuator comprises a first cylinder 3 with ports 19, 22 at or adjacent to its ends and port means 20, 21 intermediate its ends controlled by double-acting piston 11 operable to displace an actuating member 12 between two end positions and a second cylinder 5 connected end to end to the first and containing a piston 5 and having a port 17, a probe 6 extending between the cylinders to prevent the pistons from approaching one another too closely, ports 19, 22, 21, and 17 being connected to progressively adjustable valve means 41, 43, 42, 40 whereby they are connected in a predetermined sequence to a source of pressurized hydraulic medium and to exhaust. A bobbin 33 rotated by a shaft 34 has two part circumferential grooves 45A, 45B; 46A, B; 47A, B; 48A, B; aligned with each port 40, 41, 42, 43 in casing 30. A circumferential groove 44 connected with a port 39 connected to a source of fluid under pressure is connected to one of each pair of grooves the other being connected by a bore 49 to an axial bore 38 connected to atmospheric pressure. Ports 17, 18 in cylinder 2 are connected to port 40 and atmosphere respectively and ports 19, 21, 22 and 20 in cylinder 3 are connected respectively to ports 41-43 and atmosphere. The grooves and ports are so arranged that, in the first quadrant of movement of bobbin 33, pistons 5, 11 move fully to the right and piston 11 is separated from probe 6. In the second quadrant piston 11 moves to the left and abuts probe 6. In the third quadrant the pistons 5, 11 move fully to left and rod 12 is fully retracted. Member 12 "dwells" in the fourth quadrant. One valve may operate several actuators. The displacements may be applied to the needles of a knitting machine which are moved to knitting, tuck and miss positions. The machine may be circular, V-bed or oval cylinder. In a stationary cylinder machine eight or more sets of ports may be provided corresponding to set 40 to 43 equally spaced round casing 30 so that rotation of bobbin 33 causes the pressures and exhausts to appear at each set of ports in turn. To increase the possible number of actuators still further the valve may be extended by the addition of further grooves e.g. it may have four sets of four pairs of part circular grooves and sixteen sets of four ports for each set of grooves making 256 in all. The grooves are arranged in sixteen lines but the associated grooves are offset to produce successive operation of the actuators. If the needles "dwell" as they are lowered there must be two needles per feed but, if they move directly up and down, there may be one feed per needle. For patterning, to cause needles to miss pulses must not reach ports 17 and 19 and to cause needles to tuck pulses must not reach port 19. Solenoid valves are too slow so that a system of separate paths between each port and four ports in the valve casing is used consisting of manifold blocks 53 to 56, blocks 53 and 54 being connected to blocks 57 to 60 and 61 to 64.
GB3657271A 1971-08-04 1971-08-04 Hydraulic actuator Expired GB1406987A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
GB3657271A GB1406987A (en) 1971-08-04 1971-08-04 Hydraulic actuator
US276369A US3913448A (en) 1971-08-04 1972-07-31 Hydraulic actuator
NL7210678A NL7210678A (en) 1971-08-04 1972-08-03
CH1150972A CH557909A (en) 1971-08-04 1972-08-03
FR7228234A FR2149910A5 (en) 1971-08-04 1972-08-04
IT197269555A IT964884B (en) 1971-08-04 1972-08-04 HYDRAULIC ACTUATOR
DE2238539A DE2238539A1 (en) 1971-08-04 1972-08-04 HYDRAULIC ACTUATOR, IN PARTICULAR FOR KNITTING MACHINES

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3657271A GB1406987A (en) 1971-08-04 1971-08-04 Hydraulic actuator

Publications (1)

Publication Number Publication Date
GB1406987A true GB1406987A (en) 1975-09-24

Family

ID=10389356

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3657271A Expired GB1406987A (en) 1971-08-04 1971-08-04 Hydraulic actuator

Country Status (7)

Country Link
US (1) US3913448A (en)
CH (1) CH557909A (en)
DE (1) DE2238539A1 (en)
FR (1) FR2149910A5 (en)
GB (1) GB1406987A (en)
IT (1) IT964884B (en)
NL (1) NL7210678A (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE391786B (en) * 1975-03-24 1977-02-28 Westin & Backlund Ab MEDICAL REGULATOR INCLUDING AT LEAST TWO PRESSURE TRANSFER ELEMENTS
US4030551A (en) * 1976-04-12 1977-06-21 International Harvester Company Folding flex toolbar
US4356841A (en) * 1979-07-21 1982-11-02 Fmc Corporation Matrix switching control of subsea production systems
DE4203883A1 (en) * 1992-02-11 1993-08-12 Buehler Optima Maschf WASTE SCALE
US7069728B2 (en) * 2003-07-29 2006-07-04 Pratt & Whitney Canada Corp. Multi-position BOV actuator
FR2881800B1 (en) * 2005-02-04 2010-08-27 Hispano Suiza Sa SYSTEM FOR CONTROLLING A PLURALITY OF DISCHARGE VALVES OF A TURBOMACHINE
CN105782159B (en) * 2016-04-27 2017-10-10 南京航空航天大学 A kind of hydraulic rotating actuator
WO2021049033A1 (en) 2019-09-13 2021-03-18 キオクシア株式会社 Memory system
CN112943731B (en) * 2021-03-18 2022-04-01 同济大学 Reversing valve of shaft flow distribution switch
CN113153850A (en) * 2021-03-23 2021-07-23 同济大学 Shaft flow distribution high-frequency switch reversing valve
US20230265812A1 (en) * 2022-02-18 2023-08-24 Stephen Michael Roberts Variable Area Fan Nozzle Actuation System

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US785611A (en) * 1904-05-07 1905-03-21 Charles E Hastings Engine.
US2811139A (en) * 1949-07-07 1957-10-29 Rome Grader Corp Power transmission device
US2661724A (en) * 1951-07-17 1953-12-08 James P Guarnieri Inc Multiple position fluid pressure actuated apparatus
US2882685A (en) * 1956-07-02 1959-04-21 Gleason Works Hydraulic motion transmitting system
US3149537A (en) * 1961-01-19 1964-09-22 D J Campbell Co Inc Fluid control mechanism
US3253515A (en) * 1962-03-16 1966-05-31 Sinclair Research Inc Fluid actuated motor
GB1136385A (en) * 1966-01-12 1968-12-11 John Carr Doughty Knitting machine
US3502002A (en) * 1968-04-02 1970-03-24 Whiteman Mfg Co Means for synchronizing a pair of hydraulic power cylinder actuators

Also Published As

Publication number Publication date
FR2149910A5 (en) 1973-03-30
CH557909A (en) 1975-01-15
DE2238539A1 (en) 1973-03-01
IT964884B (en) 1974-01-31
NL7210678A (en) 1973-02-06
US3913448A (en) 1975-10-21

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee