[go: up one dir, main page]

EP1046610A3 - Device and method for movement of a load carrier at an industrial truck - Google Patents

Device and method for movement of a load carrier at an industrial truck Download PDF

Info

Publication number
EP1046610A3
EP1046610A3 EP00850068A EP00850068A EP1046610A3 EP 1046610 A3 EP1046610 A3 EP 1046610A3 EP 00850068 A EP00850068 A EP 00850068A EP 00850068 A EP00850068 A EP 00850068A EP 1046610 A3 EP1046610 A3 EP 1046610A3
Authority
EP
European Patent Office
Prior art keywords
movement
pivot
proportional
industrial truck
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.)
Withdrawn
Application number
EP00850068A
Other languages
German (de)
French (fr)
Other versions
EP1046610A2 (en
Inventor
Bengt Joelsson
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.)
BT Industries AB
Original Assignee
BT Industries AB
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 BT Industries AB filed Critical BT Industries AB
Publication of EP1046610A2 publication Critical patent/EP1046610A2/en
Publication of EP1046610A3 publication Critical patent/EP1046610A3/en
Withdrawn legal-status Critical Current

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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075—Constructional features or details
    • B66F9/20—Means for actuating or controlling masts, platforms, or forks
    • B66F9/22—Hydraulic devices or systems
    • 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
    • F15B2211/50545—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using braking valves to maintain a back pressure

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Civil Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

Device and method for movement of load carrying means of an industrial truck, in particular the pivot and lateral movement of a swing reach fork means. Hydraulic consumers (30, 32) provide the movements. A proportional valve (38, 40) is arranged in front each hydraulic consumer. The proportional flow valve (40) of the pivot movement has its inlet (58) connected to the outlet (56) of the other. At lateral movement the motor speed is controlled and the proportional flow valve (38) is held open. At pivot movement or simultaneous movement of both the motor speed is set so that the total flow somewhat surpasses a maximum value at the same time as the proportional flow valves (38, 40) are controlled to desired primary flow.
EP00850068A 1999-04-20 2000-04-18 Device and method for movement of a load carrier at an industrial truck Withdrawn EP1046610A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9901408A SE512652C2 (en) 1999-04-20 1999-04-20 Apparatus for, and method of, movement of load carriers of industrial trucks
SE9901408 1999-04-20

Publications (2)

Publication Number Publication Date
EP1046610A2 EP1046610A2 (en) 2000-10-25
EP1046610A3 true EP1046610A3 (en) 2005-11-30

Family

ID=20415284

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00850068A Withdrawn EP1046610A3 (en) 1999-04-20 2000-04-18 Device and method for movement of a load carrier at an industrial truck

Country Status (2)

Country Link
EP (1) EP1046610A3 (en)
SE (1) SE512652C2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004042881A1 (en) * 2004-09-04 2006-03-09 Jungheinrich Aktiengesellschaft Device for emergency lowering of a load-bearing means in a forklift
JP5352663B2 (en) * 2011-12-26 2013-11-27 株式会社豊田自動織機 Hydraulic control device for forklift
AT514115B1 (en) * 2013-04-09 2015-05-15 Ttcontrol Gmbh Electrohydraulic control circuit
EP3013660A2 (en) 2013-06-26 2016-05-04 Parker Hannifin Manufacturing Limited Energy efficient electric vehicle control system
EP2829504A1 (en) * 2013-07-23 2015-01-28 Palfinger Platforms GmbH Method for controlling a working machine and hydraulic system for a lifting work platform

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3911942A (en) * 1974-03-28 1975-10-14 Gen Signal Corp Compensated multifunction hydraulic system
GB2111250A (en) * 1981-11-17 1983-06-29 Bosch Gmbh Robert Apparatus for the control of pressure medium
DE29802498U1 (en) * 1998-02-13 1998-04-16 Heilmeier & Weinlein Forklift control

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3911942A (en) * 1974-03-28 1975-10-14 Gen Signal Corp Compensated multifunction hydraulic system
GB2111250A (en) * 1981-11-17 1983-06-29 Bosch Gmbh Robert Apparatus for the control of pressure medium
DE29802498U1 (en) * 1998-02-13 1998-04-16 Heilmeier & Weinlein Forklift control

Also Published As

Publication number Publication date
SE9901408L (en) 2000-04-17
EP1046610A2 (en) 2000-10-25
SE9901408D0 (en) 1999-04-20
SE512652C2 (en) 2000-04-17

Similar Documents

Publication Publication Date Title
GB2392211B (en) Hydraulic system with three electrohydraulic valves for controlling fluid flow to a load
EP0893575A3 (en) Flow control apparatus for use in a subterranean well and associated methods
TW200513330A (en) System and method for fabricating a three-dimensional metal object using solid free-form fabrication
AU2058101A (en) Controlling fluid flow in conduits
EP2329796A3 (en) Stent valves and uses of same
EP1356788A3 (en) Modular aneurysm repair system
EP1900343A3 (en) Stent valves and uses of same
EP0908364A3 (en) Method of operating a solenoid valve
ZA200203271B (en) Four port variable load valve weight system for a brake pipe controlled brake system.
EP1783378A3 (en) Hydraulic load-sensing system for agricultural tractors
EP0879979A3 (en) Hydraulic spool valve
EP1046610A3 (en) Device and method for movement of a load carrier at an industrial truck
AU2002353330A1 (en) A device for regulating the flow of a fluid, in particular for solenoid valves
CN108397434A (en) Rotary buffering valve, Hydraulic slewing system and engineering machinery
EP1724233A3 (en) Hydraulic pressure supply control for an industrial vehicle
EP1143178A3 (en) Variable assist power steering system and flow control valve therefor
CA2353176A1 (en) Apparatus and method for performing downhole measurements
CA2338739A1 (en) Hydraulic circuit
CA2506938A1 (en) Fluid control valve
EP1067087A3 (en) Tilt control device for fork lift truck
AU2001242525A1 (en) Improved hydraulic membrane valve for regulating fluid flow rate
EP1197593A3 (en) A control strategy for a thermally activated diverter valve used in a washing appliance
JPS5614605A (en) Hydraulic driving method and system for actuator
EP1262393A3 (en) Low slip steering system and improved fluid controller therefor
AU2001274027A1 (en) Metal complex carrying a 2-phospha-tricyclo((3.3.1.1 (3,7)))decyl radical as a ligand in hydroformylation

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

RIC1 Information provided on ipc code assigned before grant

Ipc: 7F 15B 13/02 B

Ipc: 7B 66F 9/22 A

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

17P Request for examination filed

Effective date: 20060530

AKX Designation fees paid

Designated state(s): DE FR GB

17Q First examination report despatched

Effective date: 20060811

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20140808