GB191100231A - Improvements relating to Rock Drills. - Google Patents

Improvements relating to Rock Drills.

Info

Publication number
GB191100231A
GB191100231A GB191100231DA GB191100231A GB 191100231 A GB191100231 A GB 191100231A GB 191100231D A GB191100231D A GB 191100231DA GB 191100231 A GB191100231 A GB 191100231A
Authority
GB
United Kingdom
Prior art keywords
valve
rock
piston
drills
tool
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 Henry 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 GB191100231A publication Critical patent/GB191100231A/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)
  • Percussive Tools And Related Accessories (AREA)
  • Earth Drilling (AREA)

Abstract

1911231. Rayner, G. H. Jan. 4. Percussive drills.-In rock drills of the kind set forth in Specification 19,384/06, [Class 85, Mining &c.], means are provided to prevent repeated striking of the piston against the front cylinder head when the tool is not in contact with the rock. The rear valve-collar a is formed smaller than the other collars and the passage f is so placed as to be over-run by the piston k when the tool does not touch the rock. Both ends of the valve are thus opened to exhaust and the valve is held against movement by the pressure fluid acting on the larger valve collar b. The piston therefore stops in its forward position.
GB191100231D 1911-01-04 1911-01-04 Improvements relating to Rock Drills. Expired GB191100231A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB191100231T 1911-01-04

Publications (1)

Publication Number Publication Date
GB191100231A true GB191100231A (en) 1912-01-04

Family

ID=32365029

Family Applications (1)

Application Number Title Priority Date Filing Date
GB191100231D Expired GB191100231A (en) 1911-01-04 1911-01-04 Improvements relating to Rock Drills.

Country Status (1)

Country Link
GB (1) GB191100231A (en)

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