GB1176513A – Improved hydraulic control system
– Google Patents
GB1176513A – Improved hydraulic control system
– Google Patents
Improved hydraulic control system
Info
Publication number
GB1176513A
GB1176513A
GB03686/67A
GB1368667A
GB1176513A
GB 1176513 A
GB1176513 A
GB 1176513A
GB 03686/67 A
GB03686/67 A
GB 03686/67A
GB 1368667 A
GB1368667 A
GB 1368667A
GB 1176513 A
GB1176513 A
GB 1176513A
Authority
GB
United Kingdom
Prior art keywords
conduit
valve
sump
pressure
servovalve
Prior art date
1966-03-25
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
GB03686/67A
Inventor
Edwin Cyprian Mcrae
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.)
Individual
Original Assignee
Individual
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.)
1966-03-25
Filing date
1967-03-23
Publication date
1970-01-07
1967-03-23
Application filed by Individual
filed
Critical
Individual
1970-01-07
Publication of GB1176513A
publication
Critical
patent/GB1176513A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
A01B63/1006—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors operated by hydraulic or pneumatic means the hydraulic or pneumatic means structurally belonging to the tractor
A01B63/1013—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors operated by hydraulic or pneumatic means the hydraulic or pneumatic means structurally belonging to the tractor and being located inside the tractor body
F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
F15B11/042—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the feed line, i.e. “meter in”
F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
F15B13/00—Details of servomotor systems ; Valves for servomotor systems
F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
F15B2211/00—Circuits for servomotor systems
F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
F15B2211/205—Systems with pumps
F15B2211/2053—Type of pump
F15B2211/20538—Type of pump constant capacity
F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
F15B2211/00—Circuits for servomotor systems
F15B2211/30—Directional control
F15B2211/305—Directional control characterised by the type of valves
F15B2211/30505—Non-return valves, i.e. check valves
F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
F15B2211/00—Circuits for servomotor systems
F15B2211/30—Directional control
F15B2211/305—Directional control characterised by the type of valves
F15B2211/30525—Directional control valves, e.g. 4/3-directional control valve
F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
F15B2211/00—Circuits for servomotor systems
F15B2211/30—Directional control
F15B2211/35—Directional control combined with flow control
F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
F15B2211/00—Circuits for servomotor systems
F15B2211/50—Pressure control
F15B2211/505—Pressure control characterised by the type of pressure control means
F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
F15B2211/50536—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using unloading valves controlling the supply pressure by diverting fluid to the return line
F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
F15B2211/00—Circuits for servomotor systems
F15B2211/50—Pressure control
F15B2211/555—Pressure control for assuring a minimum pressure, e.g. by using a back pressure valve
F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
F15B2211/00—Circuits for servomotor systems
F15B2211/50—Pressure control
F15B2211/575—Pilot pressure control
F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
F15B2211/00—Circuits for servomotor systems
F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
F15B2211/7051—Linear output members
F15B2211/7052—Single-acting output members
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
Y10T137/86493—Multi-way valve unit
Y10T137/86574—Supply and exhaust
Y10T137/86582—Pilot-actuated
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
Y10T137/87169—Supply and exhaust
Y10T137/87177—With bypass
Y10T137/87185—Controlled by supply or exhaust valve
Abstract
1,176,513. Fluid-pressure servomotor systems. E. C. McRAE. March 23, 1967 [March 25, 1966], No. 13686/67. Heading G3P. [Also in Division A1] In a hydraulic control circuit, pressure fluid is supplied through conduit 20 past control valve 12 to a servovalve 18 which moves to control the flow of fluid to the sump via conduit 22 and is arranged to enable small movements of the control valve to operate the control circuit. Movement of the control valve 12 to the left in the Figure opens conduit 27 to the supply conduit 20 so that the ram is supplied with pressure fluid through valve 28; closes conduit 29 to sump and also opens conduit 34 to sump via passageway 38 whereby pressure fluid acting on piston 19 of servovalve 18 moves this valve to close the sump conduit. Gradual return of the valve 12 opens conduit 34 to supply pressure through conduit 39 and at a certain pressure defined by the frictional resistance of the ring 21 on the piston 19, the servovalve 18 begins to open the exhaust conduit 22. The supply to conduit 27 is throttled at 24 and the conduit 29 to sump is opened at 25. Thus modulating valve 31 opens the sump conduit 22 an amount depending on the pressure remaining in conduit 27 which is in turn determined by the resistance to movement of the servovalve. In an embodiment the modulating valve 31 is dispersed with. The circuit can be used in a tractor power lift mechanism having draft control.
GB03686/67A
1966-03-25
1967-03-23
Improved hydraulic control system
Expired
GB1176513A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US537384A
US3370512A
(en)
1966-03-25
1966-03-25
Tractor hydraulic system
Publications (1)
Publication Number
Publication Date
GB1176513A
true
GB1176513A
(en)
1970-01-07
Family
ID=24142421
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB03686/67A
Expired
GB1176513A
(en)
1966-03-25
1967-03-23
Improved hydraulic control system
Country Status (2)
Country
Link
US
(1)
US3370512A
(en)
GB
(1)
GB1176513A
(en)
Families Citing this family (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3446119A
(en)
*
1967-03-06
1969-05-27
Leslie H Southwell
Fluid pressure responsive control apparatus
IN164865B
(en)
*
1985-07-12
1989-06-24
Vickers Inc
AT408208B
(en)
*
2000-02-22
2001-09-25
Hoerbiger Hydraulik
ARRANGEMENT FOR HYDRAULICALLY OPERATING A MOVING PART ON VEHICLES, IN PARTICULAR A COVER, A REAR COVER, A HATCH, OR THE LIKE.
Family Cites Families (4)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US2799251A
(en)
*
1954-01-18
1957-07-16
Bob G Newgen
Tractor hitch control device
US2847030A
(en)
*
1955-01-03
1958-08-12
Ford Motor Co
Valve means for tractor hydraulic system
US3088283A
(en)
*
1959-06-22
1963-05-07
Dba Sa
Hydraulic systems
US3103147A
(en)
*
1959-12-23
1963-09-10
Renault
Hydraulic lifting devices for tractors
1966
1966-03-25
US
US537384A
patent/US3370512A/en
not_active
Expired – Lifetime
1967
1967-03-23
GB
GB03686/67A
patent/GB1176513A/en
not_active
Expired
Also Published As
Publication number
Publication date
US3370512A
(en)
1968-02-27
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