ATE154774T1 - METHOD FOR AUTOMATICALLY ADJUSTING THE FUNCTIONAL PARAMETERS OF AN IMPACT APPARATUS - Google Patents

METHOD FOR AUTOMATICALLY ADJUSTING THE FUNCTIONAL PARAMETERS OF AN IMPACT APPARATUS

Info

Publication number
ATE154774T1
ATE154774T1 AT89830451T AT89830451T ATE154774T1 AT E154774 T1 ATE154774 T1 AT E154774T1 AT 89830451 T AT89830451 T AT 89830451T AT 89830451 T AT89830451 T AT 89830451T AT E154774 T1 ATE154774 T1 AT E154774T1
Authority
AT
Austria
Prior art keywords
percussion
causes
automatically adjusting
tool operates
functional parameters
Prior art date
Application number
AT89830451T
Other languages
German (de)
Inventor
Mauro Vitulano
Original Assignee
Mauro Vitulano
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 Mauro Vitulano filed Critical Mauro Vitulano
Application granted granted Critical
Publication of ATE154774T1 publication Critical patent/ATE154774T1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D9/14—Control devices for the reciprocating piston
    • B25D9/26—Control devices for adjusting the stroke of the piston or the force or frequency of impact thereof

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Lock And Its Accessories (AREA)
  • Polyesters Or Polycarbonates (AREA)

Abstract

The device exploits the striking mass rebound energy, which depends on the hardness of the material on which the tool operates. It is based on the functioning of the device as in the European Patent No. 0085279, and in providing adequate means to vary the distributor stroke during the piston upward-moving phase, as to anticipate or to postpone the percussion phase when the tool operates respectively on a less or more hard material. In this first case, the anticipation of the percussion stroke causes a decrease in the volume of the cylindrical chamber where the pressurized oil works and therefore, under the same power, it causes an increase in the blows frequency, if the working oil flow mantains unaltered.
AT89830451T 1989-10-18 1989-10-18 METHOD FOR AUTOMATICALLY ADJUSTING THE FUNCTIONAL PARAMETERS OF AN IMPACT APPARATUS ATE154774T1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP89830451A EP0426928B1 (en) 1989-10-18 1989-10-18 Method to automatically adjust the functional parameters of a percussion apparatus

Publications (1)

Publication Number Publication Date
ATE154774T1 true ATE154774T1 (en) 1997-07-15

Family

ID=8203241

Family Applications (1)

Application Number Title Priority Date Filing Date
AT89830451T ATE154774T1 (en) 1989-10-18 1989-10-18 METHOD FOR AUTOMATICALLY ADJUSTING THE FUNCTIONAL PARAMETERS OF AN IMPACT APPARATUS

Country Status (4)

Country Link
EP (1) EP0426928B1 (en)
AT (1) ATE154774T1 (en)
DE (1) DE68928143T2 (en)
ES (1) ES2103711T3 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1312140B1 (en) * 1999-06-22 2002-04-09 Priver Ind Srl PERCUSSION HYDRAULIC MACHINE OF INNOVATIVE CONCEPTION WORKING WITH CONSTANT HYDRAULIC PRESSURE.
FI20010976A (en) 2001-05-09 2002-11-10 Sandvik Tamrock Oy Method of impact control cycle and impactor
EP1697089B1 (en) 2003-12-19 2007-11-14 Clark Equipment Company Impact tool
ITBA20120055A1 (en) * 2012-09-24 2014-03-25 Tecna Group Srl SHOCK EXTRACTOR WITH PISTON AND OPTIMIZED HYDRAULIC CIRCUIT
SE542131C2 (en) 2018-03-28 2020-03-03 Epiroc Rock Drills Ab A percussion device and a method for controlling a percussion mechanism of a percussion device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2509217A1 (en) * 1981-07-10 1983-01-14 Montabert Ets MU-PERCUSSION APPARATUS USING PRESSURIZED FLUID
DE3271910D1 (en) * 1982-01-22 1986-08-14 Mauro Vitulano Directional control valve to obtain in a hydraulic appliance the alternative motion of a piston operating to charge and fire a tool, specially suitable for hydraulic hammers
FR2602448B1 (en) * 1986-08-07 1988-10-21 Montabert Ets METHOD FOR REGULATING THE PERCUSSION PARAMETERS OF THE STRIKE PISTON OF AN APPARATUS MOVED BY AN INCOMPRESSIBLE PRESSURE FLUID, AND APPARATUS FOR CARRYING OUT SAID METHOD

Also Published As

Publication number Publication date
EP0426928B1 (en) 1997-06-25
DE68928143D1 (en) 1997-07-31
ES2103711T3 (en) 1997-10-01
EP0426928A1 (en) 1991-05-15
DE68928143T2 (en) 1997-12-11

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Legal Events

Date Code Title Description
EELA Cancelled due to lapse of time