AU3659595A - Valve arrangement in a hydraulic percussive rock drill - Google Patents

Valve arrangement in a hydraulic percussive rock drill

Info

Publication number
AU3659595A
AU3659595A AU36595/95A AU3659595A AU3659595A AU 3659595 A AU3659595 A AU 3659595A AU 36595/95 A AU36595/95 A AU 36595/95A AU 3659595 A AU3659595 A AU 3659595A AU 3659595 A AU3659595 A AU 3659595A
Authority
AU
Australia
Prior art keywords
valve arrangement
rock drill
valve
hydraulic
percussive rock
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
AU36595/95A
Other versions
AU686021B2 (en
Inventor
Roger Robarts Briggs
Jarmo Uolevi Leppanen
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of AU3659595A publication Critical patent/AU3659595A/en
Application granted granted Critical
Publication of AU686021B2 publication Critical patent/AU686021B2/en
Anticipated expiration legal-status Critical
Ceased 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
    • B25D9/145—Control devices for the reciprocating piston for hydraulically actuated hammers having an accumulator

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)

Abstract

The invention provides a valve arrangement for use in a hydraulic percussive rock drill (10) wherein a piston (18), located in a cylinder (12, 14), is caused to reciprocate by hydraulic fluid flow, the valve arrangement including a valve (24) controlling the said hydraulic fluid flow, the valve being positioned between opposing first and second surfaces (26A, 32A) of two walls (26, 32) in which are formed at least first and second ports (28, 34) respectively, the valve having at least a third port (38) which is movable into register, and out of register, with the first and second ports, and having first and second hydraulic fluid sealing surfaces (24A, 24B) which respectively engage with the said first and second surfaces (26A, 32A) at least when the third port (38) is out of register with the first and second ports (28, 34); and a hydraulic rock drill (10) having an above-mentioned valve arrangement.
AU36595/95A 1994-10-17 1995-10-17 Valve arrangement in a hydraulic percussive rock drill Ceased AU686021B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ZA948118A ZA948118B (en) 1994-10-17 1994-10-17 Valve arrangement in a hydraulic percussive rock drill
ZA94/8118 1994-10-17
PCT/GB1995/002453 WO1996011775A1 (en) 1994-10-17 1995-10-17 Valve arrangement in a hydraulic percussive rock drill

Publications (2)

Publication Number Publication Date
AU3659595A true AU3659595A (en) 1996-05-06
AU686021B2 AU686021B2 (en) 1998-01-29

Family

ID=25584482

Family Applications (1)

Application Number Title Priority Date Filing Date
AU36595/95A Ceased AU686021B2 (en) 1994-10-17 1995-10-17 Valve arrangement in a hydraulic percussive rock drill

Country Status (8)

Country Link
EP (1) EP0785845B1 (en)
JP (1) JPH10509382A (en)
AT (1) ATE181691T1 (en)
AU (1) AU686021B2 (en)
CA (1) CA2202521C (en)
DE (1) DE69510557D1 (en)
WO (1) WO1996011775A1 (en)
ZA (1) ZA948118B (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1125755A (en) * 1965-04-23 1968-08-28 Vickers Ltd Improvements in or relating to hydraulically operated tools
DE1703753A1 (en) * 1968-07-05 1972-02-24 Ingbuero Dipl Ing Friedrich He Hydraulically operated impact device
JPS5819433B2 (en) * 1977-03-17 1983-04-18 日本ニユ−マチツク工業株式会社 impact power tool
WO1994023906A1 (en) * 1993-04-21 1994-10-27 Roger Robarts Briggs Rock percussion mechanism

Also Published As

Publication number Publication date
DE69510557D1 (en) 1999-08-05
WO1996011775A1 (en) 1996-04-25
CA2202521A1 (en) 1996-04-25
CA2202521C (en) 2001-04-24
EP0785845A1 (en) 1997-07-30
ZA948118B (en) 1996-03-25
ATE181691T1 (en) 1999-07-15
EP0785845B1 (en) 1999-06-30
AU686021B2 (en) 1998-01-29
JPH10509382A (en) 1998-09-14

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Legal Events

Date Code Title Description
MK14 Patent ceased section 143(a) (annual fees not paid) or expired