EP1593858A3 - Hydraulic system for fork lift truck - Google Patents

Hydraulic system for fork lift truck Download PDF

Info

Publication number
EP1593858A3
EP1593858A3 EP05008201A EP05008201A EP1593858A3 EP 1593858 A3 EP1593858 A3 EP 1593858A3 EP 05008201 A EP05008201 A EP 05008201A EP 05008201 A EP05008201 A EP 05008201A EP 1593858 A3 EP1593858 A3 EP 1593858A3
Authority
EP
European Patent Office
Prior art keywords
oil
hydraulic
hydraulic system
hydraulic oil
flow
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.)
Granted
Application number
EP05008201A
Other languages
German (de)
French (fr)
Other versions
EP1593858A2 (en
EP1593858B1 (en
Inventor
Wilhelm Kräutler
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.)
Liebherr Werk Nenzing GmbH
Original Assignee
Liebherr Werk Nenzing GmbH
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 Liebherr Werk Nenzing GmbH filed Critical Liebherr Werk Nenzing GmbH
Publication of EP1593858A2 publication Critical patent/EP1593858A2/en
Publication of EP1593858A3 publication Critical patent/EP1593858A3/en
Application granted granted Critical
Publication of EP1593858B1 publication Critical patent/EP1593858B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/04—Special measures taken in connection with the properties of the fluid
    • F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Forklifts And Lifting Vehicles (AREA)

Abstract

A hydraulic system (10) has a filter plant for the cleaning of the hydraulic oil (12) flow by filtration of particles, and a removing device for a defined part of a flow of the hydraulic oil. The removing device has filter element(s) for filtration of the partial flow of hydraulic oil. Independent claims are also included for the following: (A) a system comprising a reach stacker, and the above hydraulic system coupled to the reach stacker; and (B) filtering hydraulic oil in a hydraulic system of a reach stacker, comprising pressurizing hydraulic oil from the hydraulic system and providing the pressurized oil to an oil line; removing a defined flow portion of the pressurized hydraulic oil from the oil line; filtering the defined flow portion separately from remaining oil in the oil line via a filter; and supplying the filtered defined flow portion back to the hydraulic system at a lower pressure level.
EP05008201A 2004-05-04 2005-04-14 Hydraulic system for fork lift truck Not-in-force EP1593858B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202004007062U DE202004007062U1 (en) 2004-05-04 2004-05-04 Hydraulic system for industrial trucks
DE202004007062U 2004-05-04

Publications (3)

Publication Number Publication Date
EP1593858A2 EP1593858A2 (en) 2005-11-09
EP1593858A3 true EP1593858A3 (en) 2006-09-06
EP1593858B1 EP1593858B1 (en) 2010-07-21

Family

ID=34935189

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05008201A Not-in-force EP1593858B1 (en) 2004-05-04 2005-04-14 Hydraulic system for fork lift truck

Country Status (5)

Country Link
US (1) US20050247641A1 (en)
EP (1) EP1593858B1 (en)
AT (1) ATE475018T1 (en)
DE (2) DE202004007062U1 (en)
ES (1) ES2348665T3 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007033293A1 (en) * 2007-07-17 2009-01-29 Technotrans Ag Filtration for printing machines
CN101403403B (en) * 2007-09-28 2013-03-27 卡特彼勒公司 Fluid loop with filter bypass
SE535284C2 (en) * 2010-01-25 2012-06-12 Bt Products Ab Method for cleaning hydraulic fluid, computer program product, control unit and industrial truck

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4027595A (en) * 1975-11-10 1977-06-07 Abex Corporation Hydraulic apparatus
DE4011913A1 (en) * 1990-04-12 1991-10-17 Beyer Rudi Dipl Ing Hydraulic system with filter - separates out fine particles by channelling part of flow through by=pass line
DE4203062C1 (en) * 1992-02-04 1993-07-01 Hemscheidt Maschinentechnik Schwerin Gmbh & Co, O-2781 Schwerin, De Hydraulic installation with main and sec. flow circuit and sec. flow filtration - comprises liq. tank with partition for limited screening of liq.flow into and out of tank.
DE19515962A1 (en) * 1995-03-29 1996-10-02 Argo Gmbh Fuer Fluidtechnik Hydraulic circuit

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3543934A (en) * 1968-09-18 1970-12-01 Int Basic Economy Corp Hydraulic reservoir and filter apparatus
US4685066A (en) * 1984-12-18 1987-08-04 Caterpillar Inc. Contamination monitor and method
US5975257A (en) * 1996-09-04 1999-11-02 Komatsu Mining Systems Inc. Method and apparatus for separating steering oil and brake cooling oil within a hydraulic tank
US6063269A (en) * 1998-08-06 2000-05-16 Caterpillar Inc. Filtration apparatus for a hydraulic system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4027595A (en) * 1975-11-10 1977-06-07 Abex Corporation Hydraulic apparatus
DE4011913A1 (en) * 1990-04-12 1991-10-17 Beyer Rudi Dipl Ing Hydraulic system with filter - separates out fine particles by channelling part of flow through by=pass line
DE4203062C1 (en) * 1992-02-04 1993-07-01 Hemscheidt Maschinentechnik Schwerin Gmbh & Co, O-2781 Schwerin, De Hydraulic installation with main and sec. flow circuit and sec. flow filtration - comprises liq. tank with partition for limited screening of liq.flow into and out of tank.
DE19515962A1 (en) * 1995-03-29 1996-10-02 Argo Gmbh Fuer Fluidtechnik Hydraulic circuit

Also Published As

Publication number Publication date
EP1593858A2 (en) 2005-11-09
ES2348665T3 (en) 2010-12-10
US20050247641A1 (en) 2005-11-10
ATE475018T1 (en) 2010-08-15
EP1593858B1 (en) 2010-07-21
DE502005009930D1 (en) 2010-09-02
DE202004007062U1 (en) 2005-09-15

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