GB172243A - Improvements in or relating to valve apparatus for rock drills and like fluid pressure operated tools - Google Patents

Improvements in or relating to valve apparatus for rock drills and like fluid pressure operated tools

Info

Publication number
GB172243A
GB172243A GB430721A GB430721A GB172243A GB 172243 A GB172243 A GB 172243A GB 430721 A GB430721 A GB 430721A GB 430721 A GB430721 A GB 430721A GB 172243 A GB172243 A GB 172243A
Authority
GB
United Kingdom
Prior art keywords
valve
ports
controlled
exhaust
relating
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
GB430721A
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
Priority to GB430721A priority Critical patent/GB172243A/en
Publication of GB172243A publication Critical patent/GB172243A/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

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

172,243. Rayner, G. H. T., and Rayner, P. Feb. 5, 1921. Fluid-actuated gears, without auxiliary valves. In a percussive tool, the fluid supply to the cylinder ends is controlled by the inner edges of a twoheaded valve x, the exhaust being controlled by the piston passing cylinder ports c, d. To throw the valve, its ends are alternately put to pressure and exhaust by ports g, h controlled by the piston. The valve is locked in its end positions by reduced pressure produced by fluid alternately fed by valve-controlled ports m, n to the valve-chest ends which are constantly open to exhaust through bleed ports v, w in the valve-chest plugs, or alternately exhausted through ports g, h, c, d and a groove (not shown) in the piston.
GB430721A 1921-02-05 1921-02-05 Improvements in or relating to valve apparatus for rock drills and like fluid pressure operated tools Expired GB172243A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB430721A GB172243A (en) 1921-02-05 1921-02-05 Improvements in or relating to valve apparatus for rock drills and like fluid pressure operated tools

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB430721A GB172243A (en) 1921-02-05 1921-02-05 Improvements in or relating to valve apparatus for rock drills and like fluid pressure operated tools

Publications (1)

Publication Number Publication Date
GB172243A true GB172243A (en) 1921-12-08

Family

ID=9774690

Family Applications (1)

Application Number Title Priority Date Filing Date
GB430721A Expired GB172243A (en) 1921-02-05 1921-02-05 Improvements in or relating to valve apparatus for rock drills and like fluid pressure operated tools

Country Status (1)

Country Link
GB (1) GB172243A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3376791A (en) * 1964-02-06 1968-04-09 Brown Tractors Ltd Hydraulic oscillating power take-off mechanism for tractors

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3376791A (en) * 1964-02-06 1968-04-09 Brown Tractors Ltd Hydraulic oscillating power take-off mechanism for tractors

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