GB937993A - An improvements in or relating to agricultural machines - Google Patents

An improvements in or relating to agricultural machines

Info

Publication number
GB937993A
GB937993A GB3609360A GB3609360A GB937993A GB 937993 A GB937993 A GB 937993A GB 3609360 A GB3609360 A GB 3609360A GB 3609360 A GB3609360 A GB 3609360A GB 937993 A GB937993 A GB 937993A
Authority
GB
United Kingdom
Prior art keywords
implement
tractor
rear wheel
raised
height
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
GB3609360A
Inventor
Herbert Edward Ashfield
Charles Hartley Hull
John Dyson
Kenneth Adrian Norcliffe
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.)
David Brown Tractors Ltd
Original Assignee
David Brown Tractors Ltd
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 David Brown Tractors Ltd filed Critical David Brown Tractors Ltd
Priority to GB3609360A priority Critical patent/GB937993A/en
Publication of GB937993A publication Critical patent/GB937993A/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
    • A01B3/00—Ploughs with fixed plough-shares
    • A01B3/46—Ploughs supported partly by tractor and partly by their own wheels

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Soil Sciences (AREA)
  • Environmental Sciences (AREA)
  • Agricultural Machines (AREA)

Abstract

937,993. Agricultural implements. DAVID BROWN TRACTORS Ltd. Sept. 29, 1961 [Oct. 21, 1960; Feb. 24, 1961], Nos. 36093/60 and 6835/61. Class 6(1). [Also in Group XXXI] A semi-trailed agricultural implement is adapted to be connected to a tractor powerlift linkage mechanism having automatic draft control and has a rear wheel 44 the height of which is controlled by a hydraulic jack 54 which is subjected to the same pressure variations as occur in the lift linkage mechanism whereby the rear of the implement is raised or lowered in sympathy with the automatic variations in height of the front of the implement. The implement is pivotally connected to the bottom part of a headstock 36 which has a yoke 37 connecting it to the lower draft links of the tractor and plates 39, 40 which adjustably connect it to the upper link of the tractor. A hydraulic jack 57 connected between relatively movable parts of the linkage is hydraulically connected to the jack 54 and may be adjusted by slide block 60 to level the implement initially. The rear wheel 44 is automatically steerable. According to the second Provisional Specification two rear wheels are provided side by side and a restriction in the conduit between jacks 54, 57 enables the front of the implement to be raised with respect to its rear progressively in order to complete the furrows at the end of a row. According to the first Provisional Specification the rear wheel can rotate in a fixed plane or castor freely. Specification 914,469 is referred to,
GB3609360A 1960-10-21 1960-10-21 An improvements in or relating to agricultural machines Expired GB937993A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3609360A GB937993A (en) 1960-10-21 1960-10-21 An improvements in or relating to agricultural machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3609360A GB937993A (en) 1960-10-21 1960-10-21 An improvements in or relating to agricultural machines

Publications (1)

Publication Number Publication Date
GB937993A true GB937993A (en) 1963-09-25

Family

ID=10384874

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3609360A Expired GB937993A (en) 1960-10-21 1960-10-21 An improvements in or relating to agricultural machines

Country Status (1)

Country Link
GB (1) GB937993A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2103524A1 (en) * 1970-08-26 1972-04-14 Int Harvester Co
US4508178A (en) * 1981-09-28 1985-04-02 Cowell Peter A Tractor linkage with pitch altitude control connected to sensor ram

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2103524A1 (en) * 1970-08-26 1972-04-14 Int Harvester Co
US4508178A (en) * 1981-09-28 1985-04-02 Cowell Peter A Tractor linkage with pitch altitude control connected to sensor ram

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