EP1561867A3 - Safety system in a hydraulic apparatus for controlling a front loader of a work machine for use in load lifting and holding operations - Google Patents

Safety system in a hydraulic apparatus for controlling a front loader of a work machine for use in load lifting and holding operations Download PDF

Info

Publication number
EP1561867A3
EP1561867A3 EP05002110A EP05002110A EP1561867A3 EP 1561867 A3 EP1561867 A3 EP 1561867A3 EP 05002110 A EP05002110 A EP 05002110A EP 05002110 A EP05002110 A EP 05002110A EP 1561867 A3 EP1561867 A3 EP 1561867A3
Authority
EP
European Patent Office
Prior art keywords
valve
load lifting
front loader
controlling
work machine
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Withdrawn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
EP05002110A
Other languages
German (de)
French (fr)
Other versions
EP1561867A2 (en
Inventor
Giorgio Bedogni
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.)
OLEOSTAR SpA
Original Assignee
OLEOSTAR SpA
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 OLEOSTAR SpA filed Critical OLEOSTAR SpA
Publication of EP1561867A2 publication Critical patent/EP1561867A2/en
Publication of EP1561867A3 publication Critical patent/EP1561867A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/34—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with bucket-arms, i.e. a pair of arms, e.g. manufacturing processes, form, geometry, material of bucket-arms directly pivoted on the frames of tractors or self-propelled machines
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/226—Safety arrangements, e.g. hydraulic driven fans, preventing cavitation, leakage, overheating

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Operation Control Of Excavators (AREA)
  • Lifting Devices For Agricultural Implements (AREA)

Abstract

The invention relates to the field of control equipment for hydraulic front load raising systems in work machines. Particularly, the invention provides an electrically operated shutoff valve (A1,A2) in the supply circuit for each of the hydraulic lift cylinders (5,6), which valve is actuated by an electric signal from a slide valve (DS) to protect the system during load lifting and holding operations; particularly, the electromechanical system allows the valve to be opened during lowering operations and as the working machine swings to follow the road profile (floating condition of the Front Loader).
EP05002110A 2004-02-06 2005-02-02 Safety system in a hydraulic apparatus for controlling a front loader of a work machine for use in load lifting and holding operations Withdrawn EP1561867A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITPR20040007 2004-02-06
ITPR20040007 ITPR20040007A1 (en) 2004-02-06 2004-02-06 SAFETY SYSTEM IN HYDRAULIC CONTROL SYSTEMS FOR FRONT LOADERS OF OPERATING MACHINES DURING THE LIFTING AND STATIONING STAGES OF THE LOAD.

Publications (2)

Publication Number Publication Date
EP1561867A2 EP1561867A2 (en) 2005-08-10
EP1561867A3 true EP1561867A3 (en) 2005-10-26

Family

ID=34674582

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05002110A Withdrawn EP1561867A3 (en) 2004-02-06 2005-02-02 Safety system in a hydraulic apparatus for controlling a front loader of a work machine for use in load lifting and holding operations

Country Status (2)

Country Link
EP (1) EP1561867A3 (en)
IT (1) ITPR20040007A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9340956B2 (en) * 2012-10-11 2016-05-17 Cnh Industrial America Llc Boom lock system for work machine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6059236A (en) * 1983-09-09 1985-04-05 Kubota Ltd Floating automatic shutter of front loader
US4522109A (en) * 1983-11-21 1985-06-11 J. I. Case Company Leak-detecting hydraulic system
EP0404271A1 (en) * 1989-06-22 1990-12-27 Johannes Nijhuis Hose breakage safety system
US20040006980A1 (en) * 2002-06-22 2004-01-15 Deere & Company, A Delaware Corporation Hydraulic control arrangement for a mobile operating machine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6059236A (en) * 1983-09-09 1985-04-05 Kubota Ltd Floating automatic shutter of front loader
US4522109A (en) * 1983-11-21 1985-06-11 J. I. Case Company Leak-detecting hydraulic system
EP0404271A1 (en) * 1989-06-22 1990-12-27 Johannes Nijhuis Hose breakage safety system
US20040006980A1 (en) * 2002-06-22 2004-01-15 Deere & Company, A Delaware Corporation Hydraulic control arrangement for a mobile operating machine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 009, no. 194 (M - 403) 10 August 1985 (1985-08-10) *

Also Published As

Publication number Publication date
EP1561867A2 (en) 2005-08-10
ITPR20040007A1 (en) 2004-05-06

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