GB191219424A - Improvements in Valve Apparatus for Percussive Rock Drills and like Tools. - Google Patents

Improvements in Valve Apparatus for Percussive Rock Drills and like Tools.

Info

Publication number
GB191219424A
GB191219424A GB191219424DA GB191219424A GB 191219424 A GB191219424 A GB 191219424A GB 191219424D A GB191219424D A GB 191219424DA GB 191219424 A GB191219424 A GB 191219424A
Authority
GB
United Kingdom
Prior art keywords
valve
ports
piston
collars
auxiliary
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
Inventor
George Rayner
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
Application granted granted Critical
Publication of GB191219424A publication Critical patent/GB191219424A/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
    • B25D9/18—Valve arrangements therefor involving a piston-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
    • B25D9/14—Control devices for the reciprocating piston
    • B25D9/16—Valve arrangements therefor

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Actuator (AREA)
  • Earth Drilling (AREA)
  • Percussive Tools And Related Accessories (AREA)

Abstract

19,424. Rayner, G. Aug. 24. Fluid-actuated gears. - In valve mechanism wherein the valve has three collars and two recesses, separate independently-moving plungers are provided to move the valve which is locked in its extreme positions by fluid pressure, the separate plungers k, g or their equivalent have larger areas than the valve collars, and work in chambers which communicate with the main cylinders by passages f<1>, f controlled by the main piston. The end valve collars e, e<3> are formed with ports e<1>, e<2> which permit motive fluid to pass freely from the inlet a to the ends of the valve to -lock same, or to exhaust air from the valve ends to the ports h. The locking-fluid returns the auxiliary pistons to their original positions. In the arrangement shown, a small port l is placed between the cylinder and the right-hand auxiliary chamber, and the left-hand auxiliary piston is made of larger area to lock the valve and piston to the right should the piston strike an empty blow. In a modification, the central collar of the valve controls the exhaust, and is provided with locking ports extending to the opposite ends of the valve. The auxiliary pistons are of equal diameter, and the ports f, f<1> pass direct to the same ends of the cylinder. The auxiliary pistons may be flanged and distance pieces provided on the valve and plugs n, or the pistons may be of spherical or part-spherical shape, or the valve ends may be. recessed to receive the projections g', k'.
GB191219424D 1912-08-24 1912-08-24 Improvements in Valve Apparatus for Percussive Rock Drills and like Tools. Expired GB191219424A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB191219424T 1912-08-24

Publications (1)

Publication Number Publication Date
GB191219424A true GB191219424A (en) 1913-06-26

Family

ID=32573310

Family Applications (2)

Application Number Title Priority Date Filing Date
GB191219424D Expired GB191219424A (en) 1912-08-24 1912-08-24 Improvements in Valve Apparatus for Percussive Rock Drills and like Tools.
GB191308320D Expired GB191308320A (en) 1912-08-24 1913-04-09 Improvements in Valve Apparatus for Percussive Rock Drills and the like.

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB191308320D Expired GB191308320A (en) 1912-08-24 1913-04-09 Improvements in Valve Apparatus for Percussive Rock Drills and the like.

Country Status (1)

Country Link
GB (2) GB191219424A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2925491A4 (en) * 2012-11-28 2016-07-27 Atlas Copco Rock Drills Ab Device in a rock drilling machine and rock drilling machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2925491A4 (en) * 2012-11-28 2016-07-27 Atlas Copco Rock Drills Ab Device in a rock drilling machine and rock drilling machine

Also Published As

Publication number Publication date
GB191308320A (en) 1913-07-31

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