GB1223772A – Improvement in or relating to hydraulic drives
– Google Patents
GB1223772A – Improvement in or relating to hydraulic drives
– Google Patents
Improvement in or relating to hydraulic drives
Info
Publication number
GB1223772A
GB1223772A
GB989369A
GB989369A
GB1223772A
GB 1223772 A
GB1223772 A
GB 1223772A
GB 989369 A
GB989369 A
GB 989369A
GB 989369 A
GB989369 A
GB 989369A
GB 1223772 A
GB1223772 A
GB 1223772A
Authority
GB
United Kingdom
Prior art keywords
pressure
line
passed
pumps
pump
Prior art date
1968-02-26
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
GB989369A
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.)
Tractel SAS
Original Assignee
Tractel SAS
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.)
1968-02-26
Filing date
1969-02-25
Publication date
1971-03-03
1969-02-25
Application filed by Tractel SAS
filed
Critical
Tractel SAS
1971-03-03
Publication of GB1223772A
publication
Critical
patent/GB1223772A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
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
F15B11/05—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed specially adapted to maintain constant speed, e.g. pressure-compensated, load-responsive
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
F15B2211/20576—Systems with pumps with multiple pumps
F15B2211/20584—Combinations of pumps with high and low 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
F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
F15B2211/25—Pressure control functions
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
F15B2211/25—Pressure control functions
F15B2211/252—Low 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
F15B2211/50—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
F15B2211/50518—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using pressure relief 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
F15B2211/50—Pressure control
F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
F15B2211/5157—Pressure control characterised by the connections of the pressure control means in the circuit being connected to a pressure source and a 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
F15B2211/52—Pressure control characterised by the type of actuation
F15B2211/528—Pressure control characterised by the type of actuation actuated by fluid pressure
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
F15B2211/56—Control of an upstream pressure
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
F15B2211/5756—Pilot pressure control for opening a 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
F15B2211/60—Circuit components or control therefor
F15B2211/625—Accumulators
Abstract
1,223,772. Hydraulic motor control circuits. TRACTEL S.A. Feb.25, 1969 [Feb.26, 1968], No.9893/69. Heading F1P. A power circuit 4 is supplied by pumps 1, 2 is parallel the first having a low output and the second a high input. Both pumps are by-passed, 1 by valve 9 responsive to the pressure in the line 6 of the high output pump 2 by valve 10 responsive to the pressure in the line 4. A further overpressure valve 21 may be used to shut down the system by opening the low capacity pumps by-pass (the high capacity pump already being by-passed). Initially both pumps are effective until at pressure P, pump 1 is by-passed. At greater pressure P 2 the high output pump 2 is by-passed, control line 20, and with the fall in pressure in line 6 and consequently line 19 the low output pump becomes effective.
GB989369A
1968-02-26
1969-02-25
Improvement in or relating to hydraulic drives
Expired
GB1223772A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
FR141188
1968-02-26
Publications (1)
Publication Number
Publication Date
GB1223772A
true
GB1223772A
(en)
1971-03-03
Family
ID=8646485
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB989369A
Expired
GB1223772A
(en)
1968-02-26
1969-02-25
Improvement in or relating to hydraulic drives
Country Status (3)
Country
Link
ES
(1)
ES364060A1
(en)
FR
(1)
FR1564729A
(en)
GB
(1)
GB1223772A
(en)
Cited By (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB2245659A
(en)
*
1988-07-16
1992-01-08
Hiroshi Sato
Fluid pressure supplying apparatus
GB2279061A
(en)
*
1993-05-25
1994-12-21
Linde Ag
Hydraulic lifting arrangement
1968
1968-02-26
FR
FR1564729D
patent/FR1564729A/fr
not_active
Expired
1969
1969-02-25
GB
GB989369A
patent/GB1223772A/en
not_active
Expired
1969-02-25
ES
ES364060A
patent/ES364060A1/en
not_active
Expired
Cited By (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB2245659A
(en)
*
1988-07-16
1992-01-08
Hiroshi Sato
Fluid pressure supplying apparatus
GB2279061A
(en)
*
1993-05-25
1994-12-21
Linde Ag
Hydraulic lifting arrangement
Also Published As
Publication number
Publication date
FR1564729A
(en)
1969-04-25
ES364060A1
(en)
1970-12-16
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None