US3911679A - Closed center hydraulic system with pump and accumulator output for high speed lift - Google Patents
Closed center hydraulic system with pump and accumulator output for high speed lift Download PDFInfo
- Publication number
- US3911679A US3911679A US536564A US53656474A US3911679A US 3911679 A US3911679 A US 3911679A US 536564 A US536564 A US 536564A US 53656474 A US53656474 A US 53656474A US 3911679 A US3911679 A US 3911679A
- Authority
- US
- United States
- Prior art keywords
- accumulator
- pump
- control valve
- switch
- valve
- 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 - Lifetime
Links
Images
Classifications
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- 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
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
-
- 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
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more 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
-
- 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
- F15B2211/21—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge
- F15B2211/212—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge the pressure sources being accumulators
-
- 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
- F15B2211/265—Control of multiple pressure sources
-
- 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
- F15B2211/405—Flow control characterised by the type of flow control means or valve
- F15B2211/40576—Assemblies of multiple valves
- F15B2211/40584—Assemblies of multiple valves the flow control means arranged in parallel with a check 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
- F15B2211/40—Flow control
- F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
- F15B2211/41509—Flow control characterised by the connections of the flow control means in the circuit being connected to a pressure source and a directional control valve
- F15B2211/41518—Flow control characterised by the connections of the flow control means in the circuit being connected to a pressure source and a directional control valve being connected to multiple pressure sources
-
- 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
- F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
- F15B2211/41527—Flow control characterised by the connections of the flow control means in the circuit being connected to an output member and a 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
- F15B2211/40—Flow control
- F15B2211/46—Control of flow in the return line, i.e. meter-out 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
- F15B2211/40—Flow control
- F15B2211/47—Flow control in one direction only
- F15B2211/473—Flow control in one direction only without restriction in the reverse direction
-
- 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
- F15B2211/5151—Pressure control characterised by the connections of the pressure control means in the circuit being connected to a pressure source and a 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
- F15B2211/50—Pressure control
- F15B2211/55—Pressure control for limiting a pressure up to a maximum pressure, e.g. by using a pressure relief 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
- F15B2211/63—Electronic controllers
- F15B2211/6303—Electronic controllers using input signals
- F15B2211/6306—Electronic controllers using input signals representing a pressure
- F15B2211/6309—Electronic controllers using input signals representing a pressure the pressure being a pressure source supply 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
- F15B2211/60—Circuit components or control therefor
- F15B2211/665—Methods of control using electronic components
- F15B2211/6651—Control of the prime mover, e.g. control of the output torque or rotational speed
-
- 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
- F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
-
- 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
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S60/00—Power plants
- Y10S60/911—Fluid motor system incorporating electrical system
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Forklifts And Lifting Vehicles (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
Description
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US536564A US3911679A (en) | 1974-12-26 | 1974-12-26 | Closed center hydraulic system with pump and accumulator output for high speed lift |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US536564A US3911679A (en) | 1974-12-26 | 1974-12-26 | Closed center hydraulic system with pump and accumulator output for high speed lift |
Publications (1)
Publication Number | Publication Date |
---|---|
US3911679A true US3911679A (en) | 1975-10-14 |
Family
ID=24139031
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US536564A Expired - Lifetime US3911679A (en) | 1974-12-26 | 1974-12-26 | Closed center hydraulic system with pump and accumulator output for high speed lift |
Country Status (1)
Country | Link |
---|---|
US (1) | US3911679A (en) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4002220A (en) * | 1975-07-11 | 1977-01-11 | Towmotor Corporation | Priority steer system--hydraulic |
US4056160A (en) * | 1975-01-03 | 1977-11-01 | Linde Aktiengesellschaft | Electrically powered vehicle with power steering |
US4099378A (en) * | 1977-01-17 | 1978-07-11 | Caterpillar Tractor Co. | Blocking valve for power steering for lift trucks |
US4100739A (en) * | 1977-01-17 | 1978-07-18 | Caterpillar Tractor Co. | Pressure sensitive charging means for a steering system |
US4332270A (en) * | 1978-08-23 | 1982-06-01 | Itt Industries, Inc. | Flow control and accumulator charging valve |
US4567894A (en) * | 1984-11-09 | 1986-02-04 | General Electric Company | Hydraulically operated, mobile patient transport table useful with a magnetic resonance scanner |
US4667472A (en) * | 1984-12-28 | 1987-05-26 | The Boeing Company | Electric integrated actuator with variable gain hydraulic output |
US4748809A (en) * | 1984-07-31 | 1988-06-07 | Aisin-Warner Limited | Hydraulic servo mechanism of automatic transmission for vehicle |
EP0442860A1 (en) * | 1990-01-16 | 1991-08-21 | W. Everaert Pvba | Machine for destroying concrete surfaces |
US5317870A (en) * | 1991-05-22 | 1994-06-07 | Honda Giken Kogyo Kabushiki Kaisha | Pressure source for pressure device |
US20020092393A1 (en) * | 2000-06-01 | 2002-07-18 | Doug Mains | Traversing circular saw |
US20080016838A1 (en) * | 2006-07-20 | 2008-01-24 | Pellenc Iberica Sl | Vibrating tongs with an adaptable clamping force for fruit harvesting |
US20150122564A1 (en) * | 2012-04-27 | 2015-05-07 | Isuzu Motors Limited | Hydraulic circuit for vehicle, vehicle equipped with same, and control method therefor |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2323519A (en) * | 1941-01-24 | 1943-07-06 | Ternstedt Mfg Co | Vacuum operated window regulator |
US2674092A (en) * | 1952-09-04 | 1954-04-06 | Vickers Inc | Power transmission |
US2968927A (en) * | 1960-01-28 | 1961-01-24 | Yale & Towne Mfg Co | Hydraulic system for an industrial truck |
US3434282A (en) * | 1967-03-14 | 1969-03-25 | Dura Corp | Safety backup system for power steering |
-
1974
- 1974-12-26 US US536564A patent/US3911679A/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2323519A (en) * | 1941-01-24 | 1943-07-06 | Ternstedt Mfg Co | Vacuum operated window regulator |
US2674092A (en) * | 1952-09-04 | 1954-04-06 | Vickers Inc | Power transmission |
US2968927A (en) * | 1960-01-28 | 1961-01-24 | Yale & Towne Mfg Co | Hydraulic system for an industrial truck |
US3434282A (en) * | 1967-03-14 | 1969-03-25 | Dura Corp | Safety backup system for power steering |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4056160A (en) * | 1975-01-03 | 1977-11-01 | Linde Aktiengesellschaft | Electrically powered vehicle with power steering |
US4002220A (en) * | 1975-07-11 | 1977-01-11 | Towmotor Corporation | Priority steer system--hydraulic |
US4099378A (en) * | 1977-01-17 | 1978-07-11 | Caterpillar Tractor Co. | Blocking valve for power steering for lift trucks |
US4100739A (en) * | 1977-01-17 | 1978-07-18 | Caterpillar Tractor Co. | Pressure sensitive charging means for a steering system |
US4332270A (en) * | 1978-08-23 | 1982-06-01 | Itt Industries, Inc. | Flow control and accumulator charging valve |
US4748809A (en) * | 1984-07-31 | 1988-06-07 | Aisin-Warner Limited | Hydraulic servo mechanism of automatic transmission for vehicle |
US4567894A (en) * | 1984-11-09 | 1986-02-04 | General Electric Company | Hydraulically operated, mobile patient transport table useful with a magnetic resonance scanner |
US4667472A (en) * | 1984-12-28 | 1987-05-26 | The Boeing Company | Electric integrated actuator with variable gain hydraulic output |
EP0442860A1 (en) * | 1990-01-16 | 1991-08-21 | W. Everaert Pvba | Machine for destroying concrete surfaces |
BE1003135A3 (en) * | 1990-01-16 | 1991-12-03 | P V B A W Everaert | MACHINE FOR CRUSHING CONCRETE SURFACES. |
US5317870A (en) * | 1991-05-22 | 1994-06-07 | Honda Giken Kogyo Kabushiki Kaisha | Pressure source for pressure device |
US20020092393A1 (en) * | 2000-06-01 | 2002-07-18 | Doug Mains | Traversing circular saw |
US20080016838A1 (en) * | 2006-07-20 | 2008-01-24 | Pellenc Iberica Sl | Vibrating tongs with an adaptable clamping force for fruit harvesting |
US7810306B2 (en) * | 2006-07-20 | 2010-10-12 | Pellenc Iberica, Sl | Vibrating tongs with an adaptable clamping force for fruit harvesting |
US20150122564A1 (en) * | 2012-04-27 | 2015-05-07 | Isuzu Motors Limited | Hydraulic circuit for vehicle, vehicle equipped with same, and control method therefor |
US9114697B2 (en) * | 2012-04-27 | 2015-08-25 | Isuzu Motors Limited | Hydraulic circuit for vehicle, vehicle equipped with same, and control method therefor |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: CONNECTICUT NATIONAL BANK THE, A NATIONAL BANKING Free format text: SECURITY INTEREST;ASSIGNOR:ALLIS-CHALMERS CORPORATION A DE CORP.;REEL/FRAME:004149/0001 Effective date: 19830329 Owner name: WOODS KATHLEEN D., AS TRUSTEE Free format text: SECURITY INTEREST;ASSIGNOR:ALLIS-CHALMERS CORPORATION A DE CORP.;REEL/FRAME:004149/0001 Effective date: 19830329 |
|
AS | Assignment |
Owner name: AC MATERIAL HANDLING CORPORATION, 777 MANOR PARK D Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ALLIS-CHALMERS CORPORATION, A CORP. OF DE.;REEL/FRAME:004615/0183 |
|
AS | Assignment |
Owner name: FIRST NATIONAL BANK OF CHICAGO, THE Free format text: SECURITY INTEREST;ASSIGNOR:AC MATERIAL HANDLING CORPORATION, AN OH CORP;REEL/FRAME:004648/0689 Effective date: 19860731 |
|
AS | Assignment |
Owner name: ALLIS-CHALMERS CORPORATION, BOX 512, MILWAUKEE, WI Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:CONNECTICU NATIONAL BANK, THE;REEL/FRAME:004680/0807 Effective date: 19860714 Owner name: ALLIS-CHALMERS CORPORATION, BOX 512, MILWAUKEE, WI Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:CONNECTICUT NATIONAL BANK, THE;REEL/FRAME:004686/0798 Effective date: 19860719 Owner name: ALLIS-CHALMERS CORPORATION,WISCONSIN Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:CONNECTICUT NATIONAL BANK, THE;REEL/FRAME:004686/0798 Effective date: 19860719 |