FR2549873B1 - Circuit d'autonivellement commandant une fleche et une benne, notamment de tractopelle - Google Patents

Circuit d'autonivellement commandant une fleche et une benne, notamment de tractopelle

Info

Publication number
FR2549873B1
FR2549873B1 FR8411722A FR8411722A FR2549873B1 FR 2549873 B1 FR2549873 B1 FR 2549873B1 FR 8411722 A FR8411722 A FR 8411722A FR 8411722 A FR8411722 A FR 8411722A FR 2549873 B1 FR2549873 B1 FR 2549873B1
Authority
FR
France
Prior art keywords
backhoe
boom
bucket
self
circuit controlling
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
FR8411722A
Other languages
English (en)
Other versions
FR2549873A1 (fr
Inventor
Robert William Calvert
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.)
Cessna Aircraft Co
Original Assignee
Cessna Aircraft 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 Cessna Aircraft Co filed Critical Cessna Aircraft Co
Publication of FR2549873A1 publication Critical patent/FR2549873A1/fr
Application granted granted Critical
Publication of FR2549873B1 publication Critical patent/FR2549873B1/fr
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)
FR8411722A 1983-07-25 1984-07-24 Circuit d'autonivellement commandant une fleche et une benne, notamment de tractopelle Expired FR2549873B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/517,177 US4561342A (en) 1983-07-25 1983-07-25 Series self-leveling valve

Publications (2)

Publication Number Publication Date
FR2549873A1 FR2549873A1 (fr) 1985-02-01
FR2549873B1 true FR2549873B1 (fr) 1986-08-08

Family

ID=24058700

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8411722A Expired FR2549873B1 (fr) 1983-07-25 1984-07-24 Circuit d'autonivellement commandant une fleche et une benne, notamment de tractopelle

Country Status (5)

Country Link
US (1) US4561342A (fr)
BR (1) BR8403676A (fr)
CA (1) CA1220404A (fr)
FR (1) FR2549873B1 (fr)
GB (1) GB2143799B (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4709618A (en) * 1985-10-02 1987-12-01 The Cessna Aircraft Company Series self-leveling valve with single spool for unloading and relief
US4815357A (en) * 1987-07-21 1989-03-28 Lull Corp. Adjustable divided flow self-leveling system
GB2247448B (en) * 1987-10-07 1992-06-10 Jlg Ind Inc Levelling assembly for work platforms on articulating booms
US4923362A (en) * 1988-06-06 1990-05-08 Deere & Company Bucket leveling system with dual fluid supply
US5447094A (en) * 1994-02-07 1995-09-05 Delta Power Hydraulic Co. Hydraulic system for bucket self-leveling during raising and lowering of boom
US6389953B1 (en) 1998-09-24 2002-05-21 Delta Power Company Hydraulic leveling control system for a loader type vehicle
US6308612B1 (en) 1998-09-24 2001-10-30 Delta Power Company Hydraulic leveling control system for a loader type vehicle
JP6567395B2 (ja) * 2015-11-17 2019-08-28 株式会社クボタ 制御弁及び制御弁を備えた作業機の油圧システム
JP6537962B2 (ja) * 2015-12-07 2019-07-03 株式会社クボタ 作業機の油圧システム及び作業機
US10316489B2 (en) 2015-12-07 2019-06-11 Kubota Cororation Work machine and hydraulic system for work machine
JP6977128B2 (ja) * 2017-05-16 2021-12-08 株式会社クボタ 作業機の油圧システム及び制御弁

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2737196A (en) * 1952-06-04 1956-03-06 Eaton Mfg Co Flow divider valve
US2883077A (en) * 1956-02-23 1959-04-21 John S Pilch Bucket control for loader or the like
US2988891A (en) * 1959-06-17 1961-06-20 American Ind Company Hydraulically responsive control system
DE1122443B (de) * 1960-02-01 1962-01-18 Meiller Fahrzeuge Anordnung zur Steuerung der Hub- und Wippbewegung einer Ladeschaufel an einem Frontlader
US3033168A (en) * 1960-10-31 1962-05-08 New York Air Brake Co Hydraulic mechanism
US3179120A (en) * 1963-05-24 1965-04-20 Koehring Co Proportional flow divider
US3482600A (en) * 1968-03-04 1969-12-09 Commercial Shearing Hollow slide valves
US3703186A (en) * 1971-08-12 1972-11-21 Gen Motors Corp Flow divider control valve assembly
US4126083A (en) * 1977-02-07 1978-11-21 Caterpillar Tractor Co. Attitude control for implement
GB1599283A (en) * 1978-05-24 1981-09-30 Hayward J A D Linkages for raising and lowering loads/materials
JPS5635806A (en) * 1979-09-01 1981-04-08 Sanyo Kiki Kk Compound oil pressure circuit
US4337787A (en) * 1980-03-12 1982-07-06 Caterpillar Tractor Co. Pressure regulating hydraulic circuit and valve
US4408518A (en) * 1981-03-17 1983-10-11 The Cessna Aircraft Company Series self-leveling valve

Also Published As

Publication number Publication date
US4561342A (en) 1985-12-31
FR2549873A1 (fr) 1985-02-01
GB2143799B (en) 1985-12-24
CA1220404A (fr) 1987-04-14
GB2143799A (en) 1985-02-20
BR8403676A (pt) 1985-07-02
GB8417945D0 (en) 1984-08-15

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Legal Events

Date Code Title Description
TP Transmission of property
ST Notification of lapse
ST Notification of lapse
ST Notification of lapse