GB2009580A - Position and/or Load Controlling Fluid Circuit for Agricultural Machinery - Google Patents

Position and/or Load Controlling Fluid Circuit for Agricultural Machinery

Info

Publication number
GB2009580A
GB2009580A GB7844551A GB7844551A GB2009580A GB 2009580 A GB2009580 A GB 2009580A GB 7844551 A GB7844551 A GB 7844551A GB 7844551 A GB7844551 A GB 7844551A GB 2009580 A GB2009580 A GB 2009580A
Authority
GB
United Kingdom
Prior art keywords
agricultural machinery
load
controls
fluid circuit
controlling fluid
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.)
Granted
Application number
GB7844551A
Other versions
GB2009580B (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.)
Navistar Inc
Original Assignee
International Harverster Corp
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 International Harverster Corp filed Critical International Harverster Corp
Publication of GB2009580A publication Critical patent/GB2009580A/en
Application granted granted Critical
Publication of GB2009580B publication Critical patent/GB2009580B/en
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
    • A01B63/00—Lifting or adjusting devices or arrangements for agricultural machines or implements
    • A01B63/02—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors
    • A01B63/10—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors operated by hydraulic or pneumatic means
    • A01B63/111—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors operated by hydraulic or pneumatic means regulating working depth of implements
    • A01B63/1117—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors operated by hydraulic or pneumatic means regulating working depth of implements using a hitch position sensor

Abstract

A fluid-pressure-operated circuit for position and/or load control on agricultural machinery, such as attachments to be hitched to farm tractors on which the operating depths of said attachments are controlled by means of a hydraulically loaded power-lift cylinder-piston unit 17, 18 comprises controls 39, 52 which may be for adjusting the height of the attachment and the applied load, and sensors 25, 27 which determine the position and load on the attachment, the controls and sensors being of the fluid jet-vane type and acting on a servo-control valve 11 supplying fluid to the cylinder-piston unit. A selector 28 allows a proportioning between the two controls 39, 52. <IMAGE>
GB7844551A 1977-11-17 1978-11-15 Position and/or load controlling fluid circuit for agricultural machinery Expired GB2009580B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19772751449 DE2751449B1 (en) 1977-11-17 1977-11-17 Device for position and / or working depth control on agricultural machines, especially for attachments coupled with agricultural tractors

Publications (2)

Publication Number Publication Date
GB2009580A true GB2009580A (en) 1979-06-20
GB2009580B GB2009580B (en) 1982-04-15

Family

ID=6023978

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7844551A Expired GB2009580B (en) 1977-11-17 1978-11-15 Position and/or load controlling fluid circuit for agricultural machinery

Country Status (3)

Country Link
DE (1) DE2751449B1 (en)
FR (1) FR2408988A1 (en)
GB (1) GB2009580B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0128715A2 (en) * 1983-06-06 1984-12-19 Deere & Company Hitch control system

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2811585C2 (en) * 1978-03-17 1987-11-12 Mannesmann Rexroth GmbH, 8770 Lohr Hydraulic adjusting device with return device
YU121280A (en) * 1979-05-16 1984-02-29 Zahnradfabrik Friedrichshafen Compensation device for a control circle of an automatic control arrangement
JPS5689491A (en) * 1979-12-14 1981-07-20 Kobe Steel Ltd Master slave device
DE3019305A1 (en) * 1980-05-21 1981-11-26 Robert Bosch Gmbh, 7000 Stuttgart Hydraulic hoist control system for agricultural machine - has by=pass circuit connected to tank to control return flow during neutral circulation
DE3239952A1 (en) * 1982-10-28 1984-05-03 Robert Bosch Gmbh, 7000 Stuttgart Hydraulic device for controlling a lifting mechanism

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0128715A2 (en) * 1983-06-06 1984-12-19 Deere & Company Hitch control system
US4503916A (en) * 1983-06-06 1985-03-12 Deere & Company Hybrid hitch control system
EP0128715A3 (en) * 1983-06-06 1986-06-11 Deere & Company Hitch control system

Also Published As

Publication number Publication date
FR2408988A1 (en) 1979-06-15
DE2751449B1 (en) 1978-12-07
FR2408988B3 (en) 1981-09-04
GB2009580B (en) 1982-04-15

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee