GB1561284A - Control valve for tractor-implement hydraulic system - Google Patents

Control valve for tractor-implement hydraulic system Download PDF

Info

Publication number
GB1561284A
GB1561284A GB18071/77A GB1807177A GB1561284A GB 1561284 A GB1561284 A GB 1561284A GB 18071/77 A GB18071/77 A GB 18071/77A GB 1807177 A GB1807177 A GB 1807177A GB 1561284 A GB1561284 A GB 1561284A
Authority
GB
United Kingdom
Prior art keywords
valve
chamber
passage
bore
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.)
Expired
Application number
GB18071/77A
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 GB1561284A publication Critical patent/GB1561284A/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
    • A01B63/112—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 to control draught load, i.e. tractive force
GB18071/77A 1976-06-03 1977-04-29 Control valve for tractor-implement hydraulic system Expired GB1561284A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/692,293 US4030295A (en) 1976-06-03 1976-06-03 Control valve for tractor-implement hydraulic system

Publications (1)

Publication Number Publication Date
GB1561284A true GB1561284A (en) 1980-02-20

Family

ID=24780000

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18071/77A Expired GB1561284A (en) 1976-06-03 1977-04-29 Control valve for tractor-implement hydraulic system

Country Status (8)

Country Link
US (1) US4030295A ( )
AU (1) AU503494B2 ( )
BR (1) BR7703521A ( )
CA (1) CA1031243A ( )
FR (1) FR2353216A1 ( )
GB (1) GB1561284A ( )
SE (1) SE7700886L ( )
ZA (1) ZA771938B ( )

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2435187A1 (fr) * 1978-09-08 1980-04-04 Renault Dispositif de relevage electrohydraulique d'outils agraires
US4869065A (en) * 1988-05-09 1989-09-26 Caterpillar Inc. Single spool selector valve for simultaneous pump displacement and motor direction control in hydrostatic drive
US10626896B2 (en) 2018-08-10 2020-04-21 Cnh Industrial America Llc Control system for flushing contaminated hydraulic fluid

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH426341A (de) * 1960-12-27 1966-12-15 Hans Dipl Ing Molly Hydraulische Hebevorrichtung, insbesondere zum Regeln der Pflugtiefe
FR1363918A (fr) * 1963-03-04 1964-06-19 Renault Dispositif hydraulique de relevage d'outil et de contrôle d'effort pour tracteurs agricoles
US3235010A (en) * 1964-01-30 1966-02-15 Case Co J I Load depth control valve
US3486334A (en) * 1968-05-16 1969-12-30 Cessna Aircraft Co Hydraulic power transmission control
US3604312A (en) * 1969-10-23 1971-09-14 Allis Chalmers Mfg Co Draft control valve
US3865514A (en) * 1973-07-25 1975-02-11 Sperry Rand Corp Power transmission

Also Published As

Publication number Publication date
ZA771938B (en) 1978-02-22
AU2393277A (en) 1978-10-12
US4030295A (en) 1977-06-21
BR7703521A (pt) 1978-03-14
FR2353216A1 (fr) 1977-12-30
AU503494B2 (en) 1979-09-06
SE7700886L (sv) 1977-12-04
CA1031243A (en) 1978-05-16

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee