GB1075449A - Improvements in or relating to tractors - Google Patents

Improvements in or relating to tractors

Info

Publication number
GB1075449A
GB1075449A GB5108963A GB5108963A GB1075449A GB 1075449 A GB1075449 A GB 1075449A GB 5108963 A GB5108963 A GB 5108963A GB 5108963 A GB5108963 A GB 5108963A GB 1075449 A GB1075449 A GB 1075449A
Authority
GB
United Kingdom
Prior art keywords
control
valve
lever
pressure
rod
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
GB5108963A
Inventor
Ernest Virden Bunting
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.)
Massey Ferguson Inc
Original Assignee
Massey Ferguson Inc
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 Massey Ferguson Inc filed Critical Massey Ferguson Inc
Priority to GB5108963A priority Critical patent/GB1075449A/en
Priority to GB346565A priority patent/GB1101774A/en
Publication of GB1075449A publication Critical patent/GB1075449A/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

1,075,449. Tractor power lift mechanisms. MASSEY-FERGUSON Inc. Dec. 27, 1963, No. 51089/63. Heading A1P. A tractor power lift mechanism has three feed back linkages 51, 52 and 53 which provide respectively draft control, position control and control of the pressure existing in the ram 25, each of the controls being effective to override the other in conditioning the control valve 41 to discharge fluid from the ram. Draft control. Compressions or tensions in the upper link 14 compress spring 67 whereby plunger 69 operates rod 60 to pivot a lever 61 which moves a control lever 54 of the valve 41 the piston 44 of which is biased by the spring 50 into the supply position. A draft-setting lever 75 operates, via a rod 79, a cam 76 which moves in between the adjacent ends of the levers 61 and 54. Position control. Hand lever 90 operating in the range E-D operates rod 93 to move a cam 89 which operates control lever 54 of the valve 41. As the lift links move follow-up is provided by a rod 85 engaging a cam 87 on the rock shaft 20. Pressure control. Pressure fluid from the pump 40 is fed through conduit 47 to the ram 25 and also through conduit 107 to a pressure control valve 103 which includes a valve element 105 biased by a spring 106 adjustable by a cam 115 operated by the hand lever 90 in the range F-J. When the pressure fluid overcomes the spring bias, fluid passes along conduit 104 to operate a piston 101 and hence a rod 100 which moves the control lever 54 to operate the control valve 41 whereby pressure in the system is decreased until valve 103 cuts off the supply of fluid to the piston 101 and the valve ,41 is then returned to the neutral position by its spring 50. A modified form of the control valve 41, the lever 54 and the pressure control apparatus is described and is the same as that described in Specification 1,046,621. An auxiliary outlet supplying, for example, a ram controlling weight transfer from a trailer to the tractor can be connected to the control system by closing valve 42 and opening valve 43.
GB5108963A 1963-12-27 1963-12-27 Improvements in or relating to tractors Expired GB1075449A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB5108963A GB1075449A (en) 1963-12-27 1963-12-27 Improvements in or relating to tractors
GB346565A GB1101774A (en) 1963-12-27 1965-01-26 Improvements in or relating to tractor hydraulic control systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5108963A GB1075449A (en) 1963-12-27 1963-12-27 Improvements in or relating to tractors

Publications (1)

Publication Number Publication Date
GB1075449A true GB1075449A (en) 1967-07-12

Family

ID=10458616

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5108963A Expired GB1075449A (en) 1963-12-27 1963-12-27 Improvements in or relating to tractors

Country Status (1)

Country Link
GB (1) GB1075449A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4492080A (en) * 1979-05-09 1985-01-08 Massey-Ferguson Services N.V. Tractor hydraulic control systems

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4492080A (en) * 1979-05-09 1985-01-08 Massey-Ferguson Services N.V. Tractor hydraulic control systems

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