FR2180870A1 - - Google Patents
Info
- Publication number
- FR2180870A1 FR2180870A1 FR7313764A FR7313764A FR2180870A1 FR 2180870 A1 FR2180870 A1 FR 2180870A1 FR 7313764 A FR7313764 A FR 7313764A FR 7313764 A FR7313764 A FR 7313764A FR 2180870 A1 FR2180870 A1 FR 2180870A1
- Authority
- FR
- France
- 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.)
- Granted
Links
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
- F15B11/003—Systems with load-holding 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
- F15B2211/20—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
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/2053—Type of pump
- F15B2211/20546—Type of pump variable 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
- F15B2211/205—Systems with pumps
- F15B2211/20576—Systems with pumps with multiple pumps
-
- 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
- F15B2211/31—Directional control characterised by the positions of the valve element
- F15B2211/3105—Neutral or centre positions
- F15B2211/3116—Neutral or centre positions the pump port being open in the centre position, e.g. so-called open centre
-
- 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
- F15B2211/315—Directional control characterised by the connections of the valve or valves in the circuit
- F15B2211/3157—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line
- F15B2211/31576—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line having a single pressure source and a single output member
-
- 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
- F15B2211/32—Directional control characterised by the type of actuation
- F15B2211/329—Directional 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
- F15B2211/40—Flow control
- F15B2211/45—Control of bleed-off flow, e.g. control of bypass flow 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
- F15B2211/505—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
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/86—Control during or prevention of abnormal conditions
- F15B2211/8609—Control during or prevention of abnormal conditions the abnormal condition being cavitation
-
- 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
- Y10T137/87233—Biased exhaust valve
- Y10T137/87241—Biased closed
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00244822A US3805678A (en) | 1972-04-17 | 1972-04-17 | Hydraulic control system for load supporting hydraulic motors |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2180870A1 true FR2180870A1 (hu) | 1973-11-30 |
FR2180870B1 FR2180870B1 (hu) | 1978-12-01 |
Family
ID=22924244
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7313764A Expired FR2180870B1 (hu) | 1972-04-17 | 1973-04-16 |
Country Status (5)
Country | Link |
---|---|
US (1) | US3805678A (hu) |
JP (1) | JPS55171703U (hu) |
BE (1) | BE798216A (hu) |
CA (1) | CA985600A (hu) |
FR (1) | FR2180870B1 (hu) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2449836A1 (fr) * | 1979-02-22 | 1980-09-19 | Hydraul Innovation Ab | Valve de retenue hydraulique |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3960059A (en) * | 1974-12-09 | 1976-06-01 | Caterpillar Tractor Co. | Fast exhaust circuit for hydraulic jacks |
US4148248A (en) * | 1975-03-11 | 1979-04-10 | Maxton Manufacturing Company | Hydraulic valve control system |
US4000683A (en) * | 1975-05-27 | 1977-01-04 | Caterpillar Tractor Co. | Hydraulic load lifting system |
FR2312675B1 (fr) * | 1975-05-29 | 1977-12-09 | Bennes Marrel Sa | Dispositif de commande d'un gros distributeur hydraulique, notamment pour engins de travaux publics |
WO1982002229A1 (en) * | 1980-12-19 | 1982-07-08 | Melocik Kurt B | Control for dead engine lower |
US4392415A (en) * | 1980-12-19 | 1983-07-12 | Caterpillar Tractor Co. | Control for dead engine lower |
JPH01133503U (hu) * | 1988-03-03 | 1989-09-12 | ||
US5251705A (en) * | 1992-03-19 | 1993-10-12 | Deere & Company | Electrical trigger for quick drop valve |
US8925439B2 (en) | 2011-01-13 | 2015-01-06 | Husco International, Inc. | Valve control valve circuit for operating a single acting hydraulic cylinder |
US10378500B2 (en) * | 2016-09-27 | 2019-08-13 | Caterpillar Inc. | Protection device for limiting pump cavitation in common rail system |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR995278A (fr) * | 1948-09-17 | 1951-11-29 | Ford | Mécanisme de commande pour instruments agricoles et instruments agricoles munis de ce mécanisme |
GB1185261A (en) * | 1968-01-12 | 1970-03-25 | Pkm Hydraulik Karl Marx Stadt | Hydraulic Control Means for an Assembling and Welding Apparatus |
FR2032054A5 (en) * | 1969-02-17 | 1970-11-20 | Ind Werke K Marx | Hydraulic control device for forge rolling - mills |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2373167A (en) * | 1943-03-31 | 1945-04-10 | Western Electric Co | Extrusion apparatus |
US2618121A (en) * | 1949-11-07 | 1952-11-18 | Hpm Dev Corp | Locking control circuit for fluid-actuated motors |
US2750743A (en) * | 1952-03-12 | 1956-06-19 | Bosch Gmbh Robert | Control devices for hydraulic motors |
US3068596A (en) * | 1961-11-24 | 1962-12-18 | Caterpillar Tractor Co | Hydraulic circuit for actuation of an earthmoving scraper bowl |
US3272085A (en) * | 1963-11-19 | 1966-09-13 | Parker Hannifin Corp | Fluid system and valve assembly therefor |
US3433131A (en) * | 1967-08-22 | 1969-03-18 | Ingebret Soyland | Control systems for hydraulic power units |
US3620129A (en) * | 1970-07-15 | 1971-11-16 | Gen Signal Corp | Hydraulic power circuit with emergency lowering provisions |
-
1972
- 1972-04-17 US US00244822A patent/US3805678A/en not_active Expired - Lifetime
-
1973
- 1973-04-05 CA CA168,016A patent/CA985600A/en not_active Expired
- 1973-04-13 BE BE130015A patent/BE798216A/xx not_active IP Right Cessation
- 1973-04-16 FR FR7313764A patent/FR2180870B1/fr not_active Expired
-
1980
- 1980-05-13 JP JP1980064558U patent/JPS55171703U/ja active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR995278A (fr) * | 1948-09-17 | 1951-11-29 | Ford | Mécanisme de commande pour instruments agricoles et instruments agricoles munis de ce mécanisme |
GB1185261A (en) * | 1968-01-12 | 1970-03-25 | Pkm Hydraulik Karl Marx Stadt | Hydraulic Control Means for an Assembling and Welding Apparatus |
FR2032054A5 (en) * | 1969-02-17 | 1970-11-20 | Ind Werke K Marx | Hydraulic control device for forge rolling - mills |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2449836A1 (fr) * | 1979-02-22 | 1980-09-19 | Hydraul Innovation Ab | Valve de retenue hydraulique |
Also Published As
Publication number | Publication date |
---|---|
CA985600A (en) | 1976-03-16 |
FR2180870B1 (hu) | 1978-12-01 |
JPS55171703U (hu) | 1980-12-09 |
BE798216A (fr) | 1973-10-15 |
US3805678A (en) | 1974-04-23 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
TP | Transmission of property |