ES446771A1 - Perfeccionamientos en los vehiculos dotados de pluma. - Google Patents

Perfeccionamientos en los vehiculos dotados de pluma.

Info

Publication number
ES446771A1
ES446771A1 ES446771A ES446771A ES446771A1 ES 446771 A1 ES446771 A1 ES 446771A1 ES 446771 A ES446771 A ES 446771A ES 446771 A ES446771 A ES 446771A ES 446771 A1 ES446771 A1 ES 446771A1
Authority
ES
Spain
Prior art keywords
group
boom
ram
valve means
reservoir
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
ES446771A
Other languages
English (en)
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.)
Case LLC
Original Assignee
JI Case 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 JI Case Co filed Critical JI Case Co
Publication of ES446771A1 publication Critical patent/ES446771A1/es
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
    • E02F3/36—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
    • E02F3/433—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 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)
  • Mechanically-Actuated Valves (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
ES446771A 1975-06-23 1976-04-07 Perfeccionamientos en los vehiculos dotados de pluma. Expired ES446771A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/589,439 US3987920A (en) 1975-06-23 1975-06-23 Self-leveling system for material handling implement

Publications (1)

Publication Number Publication Date
ES446771A1 true ES446771A1 (es) 1977-06-01

Family

ID=24358029

Family Applications (1)

Application Number Title Priority Date Filing Date
ES446771A Expired ES446771A1 (es) 1975-06-23 1976-04-07 Perfeccionamientos en los vehiculos dotados de pluma.

Country Status (9)

Country Link
US (1) US3987920A (es)
JP (1) JPS523203A (es)
AU (1) AU497970B2 (es)
BR (1) BR7603993A (es)
CA (1) CA1030110A (es)
DE (1) DE2626244A1 (es)
ES (1) ES446771A1 (es)
FR (1) FR2315574A1 (es)
GB (1) GB1535284A (es)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2834480C2 (de) * 1978-08-05 1986-01-02 Baas Technik GmbH, 2000 Wedel Steuereinrichtung eines Schaufelladers od.dgl.
US4354797A (en) * 1979-05-31 1982-10-19 Hitachi Construction Machinery Co., Ltd. Front loading hydraulic excavator
JPS5635806A (en) * 1979-09-01 1981-04-08 Sanyo Kiki Kk Compound oil pressure circuit
US4353289A (en) * 1980-05-29 1982-10-12 Sperry Corporation Power transmission
US4372729A (en) * 1980-07-21 1983-02-08 Veda, Inc. Tilt control
US4408518A (en) * 1981-03-17 1983-10-11 The Cessna Aircraft Company Series self-leveling valve
US4619187A (en) * 1982-10-25 1986-10-28 Caterpillar Inc. Fluid control for two independent actuators
US4802537A (en) * 1985-09-20 1989-02-07 Caterpillar Inc. Control circuit for positioning and tilting an earthmoving blade
US4709618A (en) * 1985-10-02 1987-12-01 The Cessna Aircraft Company Series self-leveling valve with single spool for unloading and relief
US4923362A (en) * 1988-06-06 1990-05-08 Deere & Company Bucket leveling system with dual fluid supply
JPH03223508A (ja) * 1990-01-30 1991-10-02 Mitsubishi Heavy Ind Ltd シーケンスバルブ
US5860233A (en) * 1997-04-14 1999-01-19 Caterpillar Inc. Valve configuration and mounting arrangement
GB2327076A (en) * 1997-07-08 1999-01-13 Bamford Excavators Ltd Hydraulic crowd mechanisms
US6099236A (en) * 1997-12-05 2000-08-08 Caterpillar Inc. Apparatus for controlling movement of an implement relative to a frame of a work machine
CN113474512B (zh) 2019-02-22 2023-06-02 克拉克设备公司 用于动力机器的液压调平回路

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2988891A (en) * 1959-06-17 1961-06-20 American Ind Company Hydraulically responsive control system
FR1285065A (fr) * 1961-03-29 1962-02-16 Dispositif de commande du mouvement de levage et de basculement de la pelle d'une chargeuse frontale
US3175580A (en) * 1962-02-09 1965-03-30 Cessna Aircraft Co Control valve for at least two hydraulic motors
FR1351671A (fr) * 1963-02-08 1964-02-07 Cessna Aircraft Co Valve de commande pour un moteur
US3563137A (en) * 1969-06-30 1971-02-16 Cessna Aircraft Co Hydraulic self-leveling control for boom and bucket
US3650425A (en) * 1970-06-12 1972-03-21 Sperry Rand Corp Bucket loader control system

Also Published As

Publication number Publication date
DE2626244A1 (de) 1977-01-20
CA1030110A (en) 1978-04-25
BR7603993A (pt) 1977-03-22
US3987920A (en) 1976-10-26
AU1364676A (en) 1977-11-10
GB1535284A (en) 1978-12-13
AU497970B2 (en) 1979-01-25
FR2315574A1 (fr) 1977-01-21
JPS523203A (en) 1977-01-11

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