BE792617A - Hydraulic circuit for an excavator. - Google Patents

Hydraulic circuit for an excavator.

Info

Publication number
BE792617A
BE792617A BE792617DA BE792617A BE 792617 A BE792617 A BE 792617A BE 792617D A BE792617D A BE 792617DA BE 792617 A BE792617 A BE 792617A
Authority
BE
Belgium
Prior art keywords
excavator
hydraulic circuit
hydraulic
circuit
Prior art date
Application number
Other languages
French (fr)
Inventor
J W Bridwell
D L Hopkins
K R Lohbauer
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.)
Publication date
Publication of BE792617A publication Critical patent/BE792617A/en

Links

Classifications

    • 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
    • F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
    • 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
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2221—Control of flow rate; Load sensing arrangements
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2221—Control of flow rate; Load sensing arrangements
    • E02F9/2239—Control of flow rate; Load sensing arrangements using two or more pumps with cross-assistance
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2278—Hydraulic circuits
    • E02F9/2282—Systems using center bypass type changeover valves
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2278—Hydraulic circuits
    • E02F9/2292—Systems with two or more pumps
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2278—Hydraulic circuits
    • E02F9/2296—Systems with a variable displacement pump

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Operation Control Of Excavators (AREA)
  • Fluid-Pressure Circuits (AREA)
BE792617D 1971-12-13 Hydraulic circuit for an excavator. BE792617A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US20702771A 1971-12-13 1971-12-13

Publications (1)

Publication Number Publication Date
BE792617A true BE792617A (en) 1973-06-12

Family

ID=22768908

Family Applications (1)

Application Number Title Priority Date Filing Date
BE792617D BE792617A (en) 1971-12-13 Hydraulic circuit for an excavator.

Country Status (7)

Country Link
JP (1) JPS5517246B2 (en)
BE (1) BE792617A (en)
CA (1) CA982089A (en)
DE (1) DE2261627C2 (en)
FR (1) FR2163588B1 (en)
GB (1) GB1421177A (en)
SE (1) SE394304B (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3990236A (en) * 1976-02-23 1976-11-09 Caterpillar Tractor Co. Load responsive pump controls of a fluid system
US3998053A (en) * 1976-03-15 1976-12-21 Caterpillar Tractor Co. Three-pump - three-circuit fluid system of a work vehicle having controlled fluid-combining means
US4078681A (en) * 1976-08-24 1978-03-14 Caterpillar Tractor Co. Dual pump hydraulic control system with predetermined flow crossover provision
JPS5847109Y2 (en) * 1977-10-31 1983-10-27 株式会社クボタ Circuit structure of backhoe and dozer work vehicle
US4214445A (en) * 1979-05-14 1980-07-29 Dresser Industries, Inc. Hydraulic circuitry for raise drill apparatus
JPS6129813Y2 (en) * 1980-07-07 1986-09-02
JPS6138204A (en) * 1984-07-30 1986-02-24 Toshiba Mach Co Ltd Multiple pilot valve for multiple hydraulic selector valve
DE10255738A1 (en) * 2002-11-07 2004-05-27 Bosch Rexroth Ag Double-circuit hydraulic system for controlling consumers of mobile equipment such as track equipment comprises two circuits interconnected by an interconnecting valve arrangement having two valve devices
JP2006505750A (en) * 2002-11-07 2006-02-16 ボッシュ レックスロス アーゲー Hydraulic dual circuit system
GB2395769B (en) * 2002-11-27 2006-02-08 Komatsu Uk Ltd Cavitation prevention system of hydraulic travelling vehicle

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD80869A (en) *
AT243194B (en) * 1963-04-24 1965-10-25 Orenstein & Koppel Ag Circuit for hydraulic excavator
DE1634915C3 (en) * 1967-03-10 1981-02-12 O & K Orenstein & Koppel Ag Circuit for hydraulic excavator
AT291330B (en) * 1968-06-15 1971-07-12 Frisch Geb Kg Eisenwerk Hydraulic actuator for the working tools of earthworking machines

Also Published As

Publication number Publication date
SE394304B (en) 1977-06-20
DE2261627C2 (en) 1983-10-20
GB1421177A (en) 1976-01-14
DE2261627A1 (en) 1973-06-28
FR2163588B1 (en) 1981-04-30
FR2163588A1 (en) 1973-07-27
CA982089A (en) 1976-01-20
JPS4865702A (en) 1973-09-10
JPS5517246B2 (en) 1980-05-10

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Legal Events

Date Code Title Description
RE Patent lapsed

Owner name: CATERPILLAR INC.

Effective date: 19911231