SE9303017L - Hydraulic system for operation of a working organ - Google Patents

Hydraulic system for operation of a working organ

Info

Publication number
SE9303017L
SE9303017L SE9303017A SE9303017A SE9303017L SE 9303017 L SE9303017 L SE 9303017L SE 9303017 A SE9303017 A SE 9303017A SE 9303017 A SE9303017 A SE 9303017A SE 9303017 L SE9303017 L SE 9303017L
Authority
SE
Sweden
Prior art keywords
pressure
valve
port
hydraulic
oil
Prior art date
Application number
SE9303017A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE9303017D0 (en
SE501941C2 (en
Inventor
Jerzy Janczak
Original Assignee
Husqvarna 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 Husqvarna Ab filed Critical Husqvarna Ab
Priority to SE9303017A priority Critical patent/SE501941C2/en
Publication of SE9303017D0 publication Critical patent/SE9303017D0/en
Priority to AU77124/94A priority patent/AU7712494A/en
Priority to EP94927887A priority patent/EP0719201A1/en
Priority to PCT/SE1994/000818 priority patent/WO1995007801A1/en
Priority to ZA947108A priority patent/ZA947108B/en
Publication of SE9303017L publication Critical patent/SE9303017L/en
Publication of SE501941C2 publication Critical patent/SE501941C2/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G3/00—Cutting implements specially adapted for horticultural purposes; Delimbing standing trees
    • A01G3/02—Secateurs; Flower or fruit shears
    • A01G3/033—Secateurs; Flower or fruit shears having motor-driven blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D15/00—Shearing machines or shearing devices cutting by blades which move parallel to themselves
    • B23D15/12—Shearing machines or shearing devices cutting by blades which move parallel to themselves characterised by drives or gearings therefor
    • B23D15/14—Shearing machines or shearing devices cutting by blades which move parallel to themselves characterised by drives or gearings therefor actuated by fluid or gas pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D29/00—Hand-held metal-shearing or metal-cutting devices
    • B23D29/002—Hand-held metal-shearing or metal-cutting devices for cutting wire or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/005—Hydraulic driving means

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Ecology (AREA)
  • Forests & Forestry (AREA)
  • Environmental Sciences (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

A hydraulic system for operating a working device, such as a hand tool, at a distance from a hydraulic-oil pressure source, wherein the working device is driven by means of a single-acting hydraulic cylinder. To enable the hydraulic cylinder to be connected by means of one single line, the system includes a valve (17) which is connected to the pressure source (10), with associated tank (8), and which has a pressure port for receiving hydraulic oil from the pressure source (10) and a return port for delivering return oil to the tank (8), and a working port for delivering hydraulic oil to and receiving return oil from the hydraulic cylinder through the medium of one single, common pressure-and-return line connected between the valve and the cylinder. The valve (17) is adapted to be controlled by the inlet pressure acting on a valve slide which can be adjusted positionally against a spring tension force, such that when the valve slide is in a rest position, i.e. at low inlet pressure, the working port will communicate with the return port, whereas when the inlet pressure is increased the slide setting is adjusted against the action of spring biassing force so that the working port will communicate with the pressure port. This enables the hydraulic cylinder to be driven by one single line (6) and to be controlled by the pressure applied on the valve (17).
SE9303017A 1993-09-16 1993-09-16 Hydraulic system for operation of a working organ SE501941C2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
SE9303017A SE501941C2 (en) 1993-09-16 1993-09-16 Hydraulic system for operation of a working organ
AU77124/94A AU7712494A (en) 1993-09-16 1994-09-05 Hydraulic system
EP94927887A EP0719201A1 (en) 1993-09-16 1994-09-05 Hydraulic system
PCT/SE1994/000818 WO1995007801A1 (en) 1993-09-16 1994-09-05 Hydraulic system
ZA947108A ZA947108B (en) 1993-09-16 1994-09-15 Hydraulic system.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9303017A SE501941C2 (en) 1993-09-16 1993-09-16 Hydraulic system for operation of a working organ

Publications (3)

Publication Number Publication Date
SE9303017D0 SE9303017D0 (en) 1993-09-16
SE9303017L true SE9303017L (en) 1995-03-17
SE501941C2 SE501941C2 (en) 1995-06-26

Family

ID=20391113

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9303017A SE501941C2 (en) 1993-09-16 1993-09-16 Hydraulic system for operation of a working organ

Country Status (5)

Country Link
EP (1) EP0719201A1 (en)
AU (1) AU7712494A (en)
SE (1) SE501941C2 (en)
WO (1) WO1995007801A1 (en)
ZA (1) ZA947108B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2737078B1 (en) * 1995-07-24 1998-01-02 Daunot Daniel PORTABLE HYDRAULIC PRUNER
WO2009079459A1 (en) * 2007-12-19 2009-06-25 Graco Minnesota Inc. Effort reducing start mechanism for hydraulically propelled vehicles
JP5884669B2 (en) * 2012-07-24 2016-03-15 日立工機株式会社 Portable work machine
GB2520045A (en) * 2013-11-07 2015-05-13 Univ Cape Town Hydraulic pruning shears

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH330590A (en) * 1955-03-12 1958-06-15 Brauchli Oskar Jig

Also Published As

Publication number Publication date
SE9303017D0 (en) 1993-09-16
ZA947108B (en) 1995-05-15
EP0719201A1 (en) 1996-07-03
WO1995007801A1 (en) 1995-03-23
AU7712494A (en) 1995-04-03
SE501941C2 (en) 1995-06-26

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