GB1275636A - Hydraulic control system - Google Patents

Hydraulic control system

Info

Publication number
GB1275636A
GB1275636A GB28483/69A GB2848369A GB1275636A GB 1275636 A GB1275636 A GB 1275636A GB 28483/69 A GB28483/69 A GB 28483/69A GB 2848369 A GB2848369 A GB 2848369A GB 1275636 A GB1275636 A GB 1275636A
Authority
GB
United Kingdom
Prior art keywords
channel
chamber
arms
fluid
ram
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
GB28483/69A
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.)
ILSBO INDUSTRIER AB
Original Assignee
ILSBO INDUSTRIER AB
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 ILSBO INDUSTRIER AB filed Critical ILSBO INDUSTRIER AB
Publication of GB1275636A publication Critical patent/GB1275636A/en
Expired legal-status Critical Current

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F3/00Dredgers; Soil-shifting machines
    • E02F3/04Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28Dredgers; 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
    • E02F3/36Component parts
    • E02F3/42Drives for dippers, buckets, dipper-arms or bucket-arms
    • E02F3/43Control of dipper or bucket position; Control of sequence of drive operations
    • E02F3/431Control of dipper or bucket position; Control of sequence of drive operations for bucket-arms, front-end loaders, dumpers or the like
    • E02F3/432Control 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
    • E02F3/433Control 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 horizontal, e.g. self-levelling

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Operation Control Of Excavators (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

1275636 Earth-working ILSBO INDUSTRIER AB 5 June 1969 [6 June 1968] 28483/69 Heading E1F A tool holder pivotally mounted on control arms of a crane, or loader is kept at a set angle to the ground, as the control arms are pivoted, by means of a supervisory unit 16-23 which in response to movement of the control arm permits passage of fluid to valve 25 which directs fluid to the appropriate side of a hydraulic ram connected between the tool holder and arms. Wire 15 of a Bowden cable is connected to a control rod 16 of the supervisory unit and is so disposed around pulleys on the pivotal shafts of the arms and of the tool holder that a change in the angle of the tool holder from the set angle causes movement of the control rod. During raising of the arms by a second hydraulic ram, return fluid from the ram is normally diverted from screw 28 through channel 34, chamber 53, 54 and channel 33. Movement of control rod 16 opens a passage between chambers 40 and 39 and allows some of the return fluid to pass along pathway 35, 39, 40, 45, to throttling disc 26 of valve 25. The pressure created at the disc causes the plunger of the valve to move to connect channel 53 to channel 55 instead of channel 54. From channel 55 the fluid passes to the ram to adjust the position of the tool holder. When the arms are being lowered return fluid from the second ram passes through screw 29 and, through a one-way valve means, passes through channel 49 to chamber 38. Movement of the control rod in the opposite direction links chamber 38 with chamber 37 and, through channel 44, with chamber 40. A higher pressure is created this time at throttling disc 26 because the return fluid is at a higher pressure so that the plunger of the valve connects chamber 54 with chamber 58 and thus directs pressure fluid from screw 28 to screw 32 leading to the first ram.
GB28483/69A 1968-06-06 1969-06-05 Hydraulic control system Expired GB1275636A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7645/68A SE322469B (en) 1968-06-06 1968-06-06

Publications (1)

Publication Number Publication Date
GB1275636A true GB1275636A (en) 1972-05-24

Family

ID=20271916

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28483/69A Expired GB1275636A (en) 1968-06-06 1969-06-05 Hydraulic control system

Country Status (3)

Country Link
US (1) US3592107A (en)
GB (1) GB1275636A (en)
SE (1) SE322469B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3792792A (en) * 1972-05-02 1974-02-19 Int Harvester Co Hydraulic self-leveling device for a loader bucket
DE3328426A1 (en) * 1983-08-06 1985-02-21 Achim 8070 Ingolstadt Graul WORK TOOL FOR EARTH MOVEMENT DEVICES
US11104560B2 (en) * 2016-09-16 2021-08-31 Vis, Llc Adjustable positioning arms for transmission jack saddle
US10352019B2 (en) * 2017-05-25 2019-07-16 Kubota Corporation Front loader and work machine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2811265A (en) * 1956-02-07 1957-10-29 Mixermobile Manufacturers Inc Loader
US2914202A (en) * 1957-09-16 1959-11-24 Mixermobile Manufacturers Inc Loader vehicle
US3032215A (en) * 1958-08-29 1962-05-01 Deere & Co Loader bucket leveling control
US3265229A (en) * 1963-12-02 1966-08-09 Massey Ferguson Inc Automatic bucket positioning mechanism

Also Published As

Publication number Publication date
SE322469B (en) 1970-04-06
US3592107A (en) 1971-07-13

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees