GB1239281A - - Google Patents

Info

Publication number
GB1239281A
GB1239281A GB3605168A GB1239281DA GB1239281A GB 1239281 A GB1239281 A GB 1239281A GB 3605168 A GB3605168 A GB 3605168A GB 1239281D A GB1239281D A GB 1239281DA GB 1239281 A GB1239281 A GB 1239281A
Authority
GB
United Kingdom
Prior art keywords
draft
implement
cam
valve
control
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
GB3605168A
Other languages
English (en)
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 filed Critical
Publication of GB1239281A publication Critical patent/GB1239281A/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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87917—Flow path with serial valves and/or closures
    • Y10T137/88022—One valve head provides seat for other head

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Soil Sciences (AREA)
  • Environmental Sciences (AREA)
  • Lifting Devices For Agricultural Implements (AREA)
GB3605168A 1968-07-29 1968-07-29 Expired GB1239281A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3605168 1968-07-29

Publications (1)

Publication Number Publication Date
GB1239281A true GB1239281A (fr) 1971-07-14

Family

ID=10384405

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3605168A Expired GB1239281A (fr) 1968-07-29 1968-07-29

Country Status (2)

Country Link
US (1) US3613798A (fr)
GB (1) GB1239281A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1980002355A1 (fr) * 1979-05-09 1980-11-13 Massey Ferguson Services Nv Systemes de commande hydraulique tracteurs
GB2133268A (en) * 1979-12-07 1984-07-25 Bucher Guyer Ag Masch Automatic implement-lifting device for an agricultural device, in particular a mower

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3732933A (en) * 1971-06-11 1973-05-15 Ford Motor Co Tractor hydraulic lift system
US7798241B2 (en) * 2008-09-19 2010-09-21 Deere & Company Mechanical hitch control unit
LT2713690T (lt) * 2011-06-03 2017-12-11 Precision Planting Llc Žemės ūkio technikos pakabinamosios skersinės sijos įranga, sistemos ir būdai
JP6687054B2 (ja) * 2018-03-29 2020-04-22 コベルコ建機株式会社 旋回式作業機械

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2608954A (en) * 1948-02-26 1952-09-02 Jr Horace C Hogan Hydraulic control valve with automatic follow-up
US2799251A (en) * 1954-01-18 1957-07-16 Bob G Newgen Tractor hitch control device
US2921638A (en) * 1955-06-20 1960-01-19 Deere & Co Selective load and position control for agricultural tractor
US3142342A (en) * 1961-08-14 1964-07-28 Int Harvester Co Flow control compensator
US3203176A (en) * 1962-08-23 1965-08-31 Gen Motors Corp Engine governor
US3489224A (en) * 1966-11-01 1970-01-13 Massey Ferguson Inc Tractor hydraulic control system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1980002355A1 (fr) * 1979-05-09 1980-11-13 Massey Ferguson Services Nv Systemes de commande hydraulique tracteurs
US4492080A (en) * 1979-05-09 1985-01-08 Massey-Ferguson Services N.V. Tractor hydraulic control systems
GB2133268A (en) * 1979-12-07 1984-07-25 Bucher Guyer Ag Masch Automatic implement-lifting device for an agricultural device, in particular a mower
GB2133666A (en) * 1979-12-07 1984-08-01 Bucher Guyer Ag Masch Automatic implement-lifting device for an agricultural device, in particular a mower

Also Published As

Publication number Publication date
US3613798A (en) 1971-10-19

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees