GB632214A - Improvements in or relating to hydraulic control systems especially for tractor-mounted agricultural implements - Google Patents

Improvements in or relating to hydraulic control systems especially for tractor-mounted agricultural implements

Info

Publication number
GB632214A
GB632214A GB645547A GB645547A GB632214A GB 632214 A GB632214 A GB 632214A GB 645547 A GB645547 A GB 645547A GB 645547 A GB645547 A GB 645547A GB 632214 A GB632214 A GB 632214A
Authority
GB
United Kingdom
Prior art keywords
reservoir
valve
pump
oil
ram
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
GB645547A
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.)
HARRY FERGUSON HOLDINGS Ltd
WILLIAM JOHN SANDS
Original Assignee
HARRY FERGUSON HOLDINGS Ltd
WILLIAM JOHN SANDS
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 HARRY FERGUSON HOLDINGS Ltd, WILLIAM JOHN SANDS filed Critical HARRY FERGUSON HOLDINGS Ltd
Priority to GB645547A priority Critical patent/GB632214A/en
Publication of GB632214A publication Critical patent/GB632214A/en
Expired legal-status Critical Current

Links

Classifications

    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01BSOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
    • A01B63/00Lifting or adjusting devices or arrangements for agricultural machines or implements
    • A01B63/02Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors
    • A01B63/10Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors operated by hydraulic or pneumatic means
    • A01B63/111Lifting 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass

Abstract

632,214. Agricultural implements. FERGUSON HOLDINGS, Ltd., H., FERGUSON, H. G., SANDS, W. J., and CHAMBERS, J. March 7, 1947, No. 6455. [Class 6(i)] [Also in Group XXIX] Relates to tractors having a hydraulic system of the type wherein a continuouslydriven pump 20 feeds oil to a hydraulic ram 6 the piston 7 of which is connected to lifting arms for raising and lowering implements mounted on the tractor and wherein the oil is supplied to or ejected from the ram as the result of the movement of a valve 21, the position of which is affected by the depth of working of the tools. According to the invention, the system includes a reservoir 26 for fluid under pressure which is supplied by the pump, and the fluid inlet 23 on the suction side of the pump is controlled by a valve movable in accordance with the pressure attained in the reservoir. The system is shown applied to a tractor which is connected to the implement by upper and lower hitch links. The implement-controlled valve includes a double plunger 21, 39 slidable in a bushing 37 having ports 35, 40 through which fluid passes to and from the ram. The plunger is connected by pivoted links to a double lever, of the type described in Specification 550,142, whereby the valve may be operated manually, or automatically by the movement of the lifting links, to regulate the depth of cut of the tools. The pump includes a cam-operated piston 20 and is fed with oil from a sump through an inlet 23 controlled by a piston valve 24 working against a spring 25. On the delivery side 27, the pump feeds the implement-controlled valve 21 through a conduit 22 and the reservoir 26 through a conduit 22a. The reservoir 26 includes an airfilled chamber 54 separated from the oil chamber 53 by a diaphragm 52. A conduit 48 connects the reservoir with a passage 44 within which is located a plunger 24a connected to the piston valve 24. When the reservoir pressure exceeds a predetermined quantity the valve cuts off the intake of oil to the pump. Since the reservoir provides an immediately-available supply of oil for operating the ram, the lag in the system is much reduced. Specifications 470,069 and 470,087 also are referred to.
GB645547A 1947-03-07 1947-03-07 Improvements in or relating to hydraulic control systems especially for tractor-mounted agricultural implements Expired GB632214A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB645547A GB632214A (en) 1947-03-07 1947-03-07 Improvements in or relating to hydraulic control systems especially for tractor-mounted agricultural implements

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT454604D IT454604A (en) 1947-03-07
GB645547A GB632214A (en) 1947-03-07 1947-03-07 Improvements in or relating to hydraulic control systems especially for tractor-mounted agricultural implements

Publications (1)

Publication Number Publication Date
GB632214A true GB632214A (en) 1949-11-18

Family

ID=9814779

Family Applications (1)

Application Number Title Priority Date Filing Date
GB645547A Expired GB632214A (en) 1947-03-07 1947-03-07 Improvements in or relating to hydraulic control systems especially for tractor-mounted agricultural implements

Country Status (2)

Country Link
GB (1) GB632214A (en)
IT (1) IT454604A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3123146A (en) * 1964-03-03 Marindin

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3123146A (en) * 1964-03-03 Marindin

Also Published As

Publication number Publication date
IT454604A (en)

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