GB1060347A - Hydraulic control circuits - Google Patents

Hydraulic control circuits

Info

Publication number
GB1060347A
GB1060347A GB33110/65A GB3311065A GB1060347A GB 1060347 A GB1060347 A GB 1060347A GB 33110/65 A GB33110/65 A GB 33110/65A GB 3311065 A GB3311065 A GB 3311065A GB 1060347 A GB1060347 A GB 1060347A
Authority
GB
United Kingdom
Prior art keywords
spool
valve
motor
line
arm
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
GB33110/65A
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.)
Caterpillar Inc
Original Assignee
Caterpillar Tractor Co
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 Caterpillar Tractor Co filed Critical Caterpillar Tractor Co
Publication of GB1060347A publication Critical patent/GB1060347A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/34—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with bucket-arms, i.e. a pair of arms, e.g. manufacturing processes, form, geometry, material of bucket-arms directly pivoted on the frames of tractors or self-propelled machines
    • E02F3/3405—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with bucket-arms, i.e. a pair of arms, e.g. manufacturing processes, form, geometry, material of bucket-arms directly pivoted on the frames of tractors or self-propelled machines and comprising an additional linkage mechanism
    • E02F3/3411—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with bucket-arms, i.e. a pair of arms, e.g. manufacturing processes, form, geometry, material of bucket-arms directly pivoted on the frames of tractors or self-propelled machines and comprising an additional linkage mechanism of the Z-type
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
    • E02F3/43—Control of dipper or bucket position; Control of sequence of drive operations
    • E02F3/431—Control of dipper or bucket position; Control of sequence of drive operations for bucket-arms, front-end loaders, dumpers or the like
    • E02F3/432—Control of dipper or bucket position; Control of sequence of drive operations for bucket-arms, front-end loaders, dumpers or the like for keeping the bucket in a predetermined position or attitude
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
    • E02F3/43—Control of dipper or bucket position; Control of sequence of drive operations
    • E02F3/431—Control of dipper or bucket position; Control of sequence of drive operations for bucket-arms, front-end loaders, dumpers or the like
    • E02F3/434—Control of dipper or bucket position; Control of sequence of drive operations for bucket-arms, front-end loaders, dumpers or the like providing automatic sequences of movements, e.g. automatic dumping or loading, automatic return-to-dig
    • 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
    • F15B11/20—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors controlling several interacting or sequentially-operating 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
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/04—Special measures taken in connection with the properties of the fluid
    • F15B21/044—Removal or measurement of undissolved gas, e.g. de-aeration, venting or bleeding

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Analytical Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Lifting Devices For Agricultural Implements (AREA)
  • Mechanically-Actuated Valves (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Auxiliary Drives, Propulsion Controls, And Safety Devices (AREA)
  • Motor Or Generator Cooling System (AREA)

Abstract

1,060,347. Hydraulic control circuits. CATERPILLAR TRACTOR CO. Aug.3, 1965 [Aug.11, 1964], No.33110/65. Heading F1P. A hydraulic motor (20) Fig. 2 (not shown), for lifting an arm (16) is supplied by a pump (32) through a line (36), a control valve (34) of the spool type and a line (68); the spool (52) of the valve (34) being held in the supply position against the action of a spring (62) by a disconnectable link between it and the spool (126) of a slave valve (S) and which link is broken at the end of the lifting stroke of the motor (20) by the spool (126) being displaced against a spring (90) by pressure fluid directed from a branch line (120) of line (68) through a further spool valve (110) actuated by the arm (16) whereby the motor (20) is disconnected from the pump (32). The housing (124) of valve (S) has a restricted orifice (138) whereby trapped air may be vented to a reservoir (30). Pressure is maintained in supply line (68) until the spool (52) is displaced manually to the right to effect the return stroke of the motor (20). The arm (16) carries a cam for actuating valve spool (112) at variable stroke lengths of the motor (20).
GB33110/65A 1964-08-11 1965-08-03 Hydraulic control circuits Expired GB1060347A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US388789A US3289546A (en) 1964-08-11 1964-08-11 Hydraulic actuating mechanism

Publications (1)

Publication Number Publication Date
GB1060347A true GB1060347A (en) 1967-03-01

Family

ID=23535533

Family Applications (1)

Application Number Title Priority Date Filing Date
GB33110/65A Expired GB1060347A (en) 1964-08-11 1965-08-03 Hydraulic control circuits

Country Status (4)

Country Link
US (1) US3289546A (en)
DE (1) DE1500345C3 (en)
ES (1) ES316370A1 (en)
GB (1) GB1060347A (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3400634A (en) * 1966-10-21 1968-09-10 Caterpillar Tractor Co Vent means for hydraulic circuit
US3503306A (en) * 1968-07-23 1970-03-31 Caterpillar Tractor Co Positive pressure detent and release apparatus for control valves
US3670628A (en) * 1970-09-02 1972-06-20 Caterpillar Tractor Co Kickout valve and circuit
US3717073A (en) * 1971-06-23 1973-02-20 Caterpillar Tractor Co Proximity switch magnet control for bucket positioner
US3776099A (en) * 1971-12-06 1973-12-04 Applied Power Inc Automatic release and centering device
US3981539A (en) * 1974-09-30 1976-09-21 Caterpillar Tractor Co. Wagon door control system and dual cam therefor
US5046312A (en) * 1988-07-08 1991-09-10 Kubota, Ltd. Swivel speed control circuit for working vehicle
DE102015104761A1 (en) * 2015-03-27 2016-09-29 Claas Selbstfahrende Erntemaschinen Gmbh Hydraulic system with oil venting
US9714497B2 (en) 2015-10-21 2017-07-25 Caterpillar Inc. Control system and method for operating a machine
EP3450634B1 (en) 2017-08-30 2021-03-03 Topcon Positioning Systems, Inc. Method and apparatus for machine operator command attenuation
US11828040B2 (en) * 2019-09-27 2023-11-28 Topcon Positioning Systems, Inc. Method and apparatus for mitigating machine operator command delay

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2159879A (en) * 1936-02-07 1939-05-23 Servo Frein Dewandre Sa Pneumatic control apparatus
GB549134A (en) * 1941-08-19 1942-11-06 David Bro Tractors Ltd Improvements in hydraulic mechanism for the operation of tractor-drawn agricultural implements
US2670713A (en) * 1948-10-06 1954-03-02 Deere Mfg Co Controllable limit means for regulating strokes of fluid pressure apparatus
US2649076A (en) * 1950-06-20 1953-08-18 Burndy Engineering Co Inc Power-operated tool with automatic control valve system
FR1044005A (en) * 1951-10-19 1953-11-13 Improvements to hydraulic presses

Also Published As

Publication number Publication date
DE1500345B2 (en) 1973-12-13
DE1500345C3 (en) 1974-07-04
ES316370A1 (en) 1966-04-16
DE1500345A1 (en) 1969-05-08
US3289546A (en) 1966-12-06

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