GB2074925B - Variable frequency hydraulically reciprocated impact tool - Google Patents

Variable frequency hydraulically reciprocated impact tool

Info

Publication number
GB2074925B
GB2074925B GB7909389A GB7909389A GB2074925B GB 2074925 B GB2074925 B GB 2074925B GB 7909389 A GB7909389 A GB 7909389A GB 7909389 A GB7909389 A GB 7909389A GB 2074925 B GB2074925 B GB 2074925B
Authority
GB
United Kingdom
Prior art keywords
variable frequency
impact tool
hydraulically reciprocated
reciprocated
hydraulically
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
Application number
GB7909389A
Other versions
GB2074925A (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
Application filed by Hydroacoustics Inc filed Critical Hydroacoustics Inc
Priority to GB7909389A priority Critical patent/GB2074925B/en
Publication of GB2074925A publication Critical patent/GB2074925A/en
Application granted granted Critical
Publication of GB2074925B publication Critical patent/GB2074925B/en
Expired 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L17/00—Slide valve-gear or valve arrangements with cylindrical, sleeve, or part annularly-shaped valves surrounding working cylinder or piston
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L23/00—Valves controlled by impact by piston, e.g. in free-piston machines
    • 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)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Percussive Tools And Related Accessories (AREA)
GB7909389A 1979-03-16 1979-03-16 Variable frequency hydraulically reciprocated impact tool Expired GB2074925B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7909389A GB2074925B (en) 1979-03-16 1979-03-16 Variable frequency hydraulically reciprocated impact tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB7909389A GB2074925B (en) 1979-03-16 1979-03-16 Variable frequency hydraulically reciprocated impact tool

Publications (2)

Publication Number Publication Date
GB2074925A GB2074925A (en) 1981-11-11
GB2074925B true GB2074925B (en) 1983-03-16

Family

ID=10503940

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7909389A Expired GB2074925B (en) 1979-03-16 1979-03-16 Variable frequency hydraulically reciprocated impact tool

Country Status (1)

Country Link
GB (1) GB2074925B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8606645D0 (en) * 1986-03-18 1986-04-23 Dowty Mining Machinery Ltd Rock drill assembly
AU676301B2 (en) * 1993-04-21 1997-03-06 Roger Robarts Briggs Rock percussion mechanism
FR3044572B1 (en) * 2015-12-02 2017-12-29 Montabert Roger ROCK BRISE DEVICE

Also Published As

Publication number Publication date
GB2074925A (en) 1981-11-11

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee