GB194632A - Improvements in or relating to valves for rock drills and like fluid pressure operated tools - Google Patents

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

Info

Publication number
GB194632A
GB194632A GB2512422A GB2512422A GB194632A GB 194632 A GB194632 A GB 194632A GB 2512422 A GB2512422 A GB 2512422A GB 2512422 A GB2512422 A GB 2512422A GB 194632 A GB194632 A GB 194632A
Authority
GB
United Kingdom
Prior art keywords
valves
relating
fluid pressure
pressure operated
operated tools
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
GB2512422A
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 GB2512422A priority Critical patent/GB194632A/en
Publication of GB194632A publication Critical patent/GB194632A/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)
  • Earth Drilling (AREA)

Abstract

194,632. Rayner, G. H. T., and Rayner, P. Sept. 16, 1922. Fluid-actuated gears. - A rock drill or other percussive tool is provided with a piston or combined lift and piston valve which is reversed by compression, and has a central head q controlling the admission through ports j, c to one end of the cylinder and an auxiliary exhaust through port f, and end extensions r, r<1>, the extension r controlling the admission to the, other end of the cylinder, and the extension r<1> being open to the atmosphere. A leakage duct may be provided to prevent accumulated pressure in the passage f prematurely reversing the valve. The valvechamber ends may be provided with fluid-pressure leakage ducts to supplement the compression pressure.
GB2512422A 1922-09-16 1922-09-16 Improvements in or relating to valves for rock drills and like fluid pressure operated tools Expired GB194632A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2512422A GB194632A (en) 1922-09-16 1922-09-16 Improvements in or relating to valves for rock drills and like fluid pressure operated tools

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2512422A GB194632A (en) 1922-09-16 1922-09-16 Improvements in or relating to valves for rock drills and like fluid pressure operated tools

Publications (1)

Publication Number Publication Date
GB194632A true GB194632A (en) 1923-03-15

Family

ID=10222590

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2512422A Expired GB194632A (en) 1922-09-16 1922-09-16 Improvements in or relating to valves for rock drills and like fluid pressure operated tools

Country Status (1)

Country Link
GB (1) GB194632A (en)

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