FR2344378A1 - Hydraulic oscillator with valve movement control - has piston communicating between channel and chamber pocket when piston moves to end of displacement in one direction - Google Patents

Hydraulic oscillator with valve movement control - has piston communicating between channel and chamber pocket when piston moves to end of displacement in one direction

Info

Publication number
FR2344378A1
FR2344378A1 FR7621495A FR7621495A FR2344378A1 FR 2344378 A1 FR2344378 A1 FR 2344378A1 FR 7621495 A FR7621495 A FR 7621495A FR 7621495 A FR7621495 A FR 7621495A FR 2344378 A1 FR2344378 A1 FR 2344378A1
Authority
FR
France
Prior art keywords
piston
pocket
displacement
chamber
valve element
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
FR7621495A
Other languages
French (fr)
Other versions
FR2344378B3 (en
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.)
Hydroacoustics Inc
Original Assignee
Hydroacoustics Inc
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
Priority claimed from US05/666,733 external-priority patent/US4077304A/en
Application filed by Hydroacoustics Inc filed Critical Hydroacoustics Inc
Publication of FR2344378A1 publication Critical patent/FR2344378A1/en
Application granted granted Critical
Publication of FR2344378B3 publication Critical patent/FR2344378B3/fr
Granted legal-status Critical Current

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
    • B25D9/16—Valve arrangements therefor
    • B25D9/20—Valve arrangements therefor involving a tubular-type slide valve
    • 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
    • B25D9/06—Means for driving the impulse member
    • B25D9/12—Means for driving the impulse member comprising a built-in liquid motor, i.e. the tool being driven by hydraulic pressure
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/02—Generating seismic energy
    • G01V1/133—Generating seismic energy using fluidic driving means, e.g. highly pressurised fluids; using implosion
    • G01V1/135—Generating seismic energy using fluidic driving means, e.g. highly pressurised fluids; using implosion by deforming or displacing surfaces of enclosures, e.g. by hydraulically driven vibroseis™
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2209/00—Details of portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D2209/002—Pressure accumulators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2209/00—Details of portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D2209/005—Details of portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously having a tubular-slide valve, which is coaxial with the piston

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Remote Sensing (AREA)
  • Automation & Control Theory (AREA)
  • Acoustics & Sound (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

In a hydraulic oscillator having a piston and valve element both movable in opposite directions and both disposed in a chamber in which hydraulic pressure is switched in opposite senses between supply and return pressures, appts. for controlling the movement of the valve element comprises (a) means in the chamber defining a pocket for receiving the valve element when it moves in one of the directions and has switched the fluid pressure in the chamber in one of the opposite senses so as to develop forces on the piston in the direction opposite to the one direction, (b) channel means operative when in communication with the pocket for, providing a path, for the flow of hydraulic fluid from the pocket when the valve element is received therein, and (c) means in the piston for providing communication between the channel means and the pocket when the piston has moved to a position near the end of its displacement in one direction. The displacement of the valve in one direction, and the period of time for the valve element to switch the fluid pressure in the chamber in the other of the opposite senses, so as to again enable the development of forces on the piston in the one direction, is controllable as a function of the flow through the channel means.
FR7621495A 1976-03-15 1976-07-13 Hydraulic oscillator with valve movement control - has piston communicating between channel and chamber pocket when piston moves to end of displacement in one direction Granted FR2344378A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US05/666,733 US4077304A (en) 1976-03-15 1976-03-15 Impact tools
US68282076A 1976-05-03 1976-05-03

Publications (2)

Publication Number Publication Date
FR2344378A1 true FR2344378A1 (en) 1977-10-14
FR2344378B3 FR2344378B3 (en) 1979-04-06

Family

ID=27099522

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7621495A Granted FR2344378A1 (en) 1976-03-15 1976-07-13 Hydraulic oscillator with valve movement control - has piston communicating between channel and chamber pocket when piston moves to end of displacement in one direction

Country Status (2)

Country Link
FR (1) FR2344378A1 (en)
SE (1) SE7607069L (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0010075A1 (en) * 1978-10-10 1980-04-16 Institut Cerac S.A. A demolition tool for breaking solid materials
EP0149676A1 (en) * 1983-05-13 1985-07-31 Landmark West Ltd Rock drill
FR2584968A1 (en) * 1985-07-16 1987-01-23 Montabert Ets Method for controlling the movement of the striking piston of a percussion appliance which is driven by a pressurised incompressible fluid, and appliance for implementing the method
EP0214064A1 (en) * 1985-07-16 1987-03-11 Etablissements Montabert Method of controlling the movement of the impacting piston of a non-compressible fluid-actuated percussion device, and device therefor
EP0473968A2 (en) * 1990-09-06 1992-03-11 Krupp Maschinentechnik Gesellschaft Mit Beschränkter Haftung Hydraulic operated impact drilling device, especially for bolt drilling

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0010075A1 (en) * 1978-10-10 1980-04-16 Institut Cerac S.A. A demolition tool for breaking solid materials
EP0149676A1 (en) * 1983-05-13 1985-07-31 Landmark West Ltd Rock drill
EP0149676A4 (en) * 1983-05-13 1985-09-02 Landmark West Ltd Rock drill.
FR2584968A1 (en) * 1985-07-16 1987-01-23 Montabert Ets Method for controlling the movement of the striking piston of a percussion appliance which is driven by a pressurised incompressible fluid, and appliance for implementing the method
EP0214064A1 (en) * 1985-07-16 1987-03-11 Etablissements Montabert Method of controlling the movement of the impacting piston of a non-compressible fluid-actuated percussion device, and device therefor
FR2595972A2 (en) * 1985-07-16 1987-09-25 Montabert Ets Percussion appliance
EP0473968A2 (en) * 1990-09-06 1992-03-11 Krupp Maschinentechnik Gesellschaft Mit Beschränkter Haftung Hydraulic operated impact drilling device, especially for bolt drilling
EP0473968A3 (en) * 1990-09-06 1992-05-27 Krupp Maschinentechnik Gesellschaft Mit Beschraenkter Haftung Hydraulic operated impact drilling device, especially for bolt drilling

Also Published As

Publication number Publication date
FR2344378B3 (en) 1979-04-06
SE7607069L (en) 1977-09-16

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