GB276747A - Improvements in or relating to rock drills and like tools - Google Patents

Improvements in or relating to rock drills and like tools

Info

Publication number
GB276747A
GB276747A GB1409926A GB1409926A GB276747A GB 276747 A GB276747 A GB 276747A GB 1409926 A GB1409926 A GB 1409926A GB 1409926 A GB1409926 A GB 1409926A GB 276747 A GB276747 A GB 276747A
Authority
GB
United Kingdom
Prior art keywords
valve
cylinder
holman
cap
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
GB1409926A
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 GB1409926A priority Critical patent/GB276747A/en
Publication of GB276747A publication Critical patent/GB276747A/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
    • B25D9/24—Valve arrangements therefor involving a rocking-plate type valve

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Check Valves (AREA)

Abstract

276,747. Holman, A. T., and Holman, P. M. June 3, 1926. Percussive drills.-The cylinder end is closed by a cap 15 between which and the adjacent end of the cylinder 10 is interposed an annular plate 16 which surrounds the twist bar and is provided with a boss 17 engaging a recess in the cap 15. The fluid supply to the ends of the cylinder is controlled by a flap valve 20 hinged at 21. Small holes are provided to balance the valve. Such holes may be provided in valves arranged as described in Specifications 236,797 and 262,998, [both in Class 122 (ii), Steam-engine distributing and expansion valves &c.]. Constructions are described wherein the twist mechanism is dispensed with or is arranged forward of the valve, only a water-tube being accommodated coaxially in the plate 16 and valve 20.
GB1409926A 1926-06-03 1926-06-03 Improvements in or relating to rock drills and like tools Expired GB276747A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1409926A GB276747A (en) 1926-06-03 1926-06-03 Improvements in or relating to rock drills and like tools

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1409926A GB276747A (en) 1926-06-03 1926-06-03 Improvements in or relating to rock drills and like tools

Publications (1)

Publication Number Publication Date
GB276747A true GB276747A (en) 1927-09-05

Family

ID=10034955

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1409926A Expired GB276747A (en) 1926-06-03 1926-06-03 Improvements in or relating to rock drills and like tools

Country Status (1)

Country Link
GB (1) GB276747A (en)

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