GB2221418B - Reciprocating percussive device - Google Patents

Reciprocating percussive device

Info

Publication number
GB2221418B
GB2221418B GB8917175A GB8917175A GB2221418B GB 2221418 B GB2221418 B GB 2221418B GB 8917175 A GB8917175 A GB 8917175A GB 8917175 A GB8917175 A GB 8917175A GB 2221418 B GB2221418 B GB 2221418B
Authority
GB
United Kingdom
Prior art keywords
percussive device
reciprocating percussive
reciprocating
percussive
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.)
Expired - Lifetime
Application number
GB8917175A
Other versions
GB8917175D0 (en
GB2221418A (en
Inventor
John Graham Davies
Bruce Foster
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.)
Boart UK Ltd
Original Assignee
Boart UK Ltd
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 Boart UK Ltd filed Critical Boart UK Ltd
Publication of GB8917175D0 publication Critical patent/GB8917175D0/en
Publication of GB2221418A publication Critical patent/GB2221418A/en
Application granted granted Critical
Publication of GB2221418B publication Critical patent/GB2221418B/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B25D9/06—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
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/08—Means for retaining and guiding the tool bit, e.g. chucks allowing axial oscillation of the tool bit
    • B25D17/084—Rotating chucks or sockets
    • 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)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Automation & Control Theory (AREA)
  • Earth Drilling (AREA)
  • Percussive Tools And Related Accessories (AREA)
GB8917175A 1988-07-27 1989-07-27 Reciprocating percussive device Expired - Lifetime GB2221418B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB888817907A GB8817907D0 (en) 1988-07-27 1988-07-27 Reciprocating percussive device

Publications (3)

Publication Number Publication Date
GB8917175D0 GB8917175D0 (en) 1989-09-13
GB2221418A GB2221418A (en) 1990-02-07
GB2221418B true GB2221418B (en) 1992-02-19

Family

ID=10641208

Family Applications (2)

Application Number Title Priority Date Filing Date
GB888817907A Pending GB8817907D0 (en) 1988-07-27 1988-07-27 Reciprocating percussive device
GB8917175A Expired - Lifetime GB2221418B (en) 1988-07-27 1989-07-27 Reciprocating percussive device

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB888817907A Pending GB8817907D0 (en) 1988-07-27 1988-07-27 Reciprocating percussive device

Country Status (3)

Country Link
CA (1) CA1325562C (en)
GB (2) GB8817907D0 (en)
ZA (1) ZA895716B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI98401C (en) 1995-10-10 1997-06-10 Tamrock Oy A method for adjusting the drilling of a drilling machine and a rock drilling machine
US6293309B1 (en) * 1996-08-29 2001-09-25 Twinwood Engineering Ltd Control valve apparatus

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB261824A (en) * 1925-08-15 1926-11-15 George Henry Turton Rayner Improvements in or relating to percussive tools
GB1229122A (en) * 1968-05-08 1971-04-21
US3721095A (en) * 1971-08-23 1973-03-20 Bolt Associates Inc Controllable force method and system of driving piles
US3995700A (en) * 1975-10-14 1976-12-07 Gardner-Denver Company Hydraulic rock drill system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB261824A (en) * 1925-08-15 1926-11-15 George Henry Turton Rayner Improvements in or relating to percussive tools
GB1229122A (en) * 1968-05-08 1971-04-21
US3721095A (en) * 1971-08-23 1973-03-20 Bolt Associates Inc Controllable force method and system of driving piles
US3995700A (en) * 1975-10-14 1976-12-07 Gardner-Denver Company Hydraulic rock drill system

Also Published As

Publication number Publication date
ZA895716B (en) 1990-04-25
GB8917175D0 (en) 1989-09-13
GB8817907D0 (en) 1988-09-01
GB2221418A (en) 1990-02-07
CA1325562C (en) 1993-12-28

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Expiry date: 20090726