GB109777A - Improvements in Percussive Rock Drills and like Fluid Pressure Operated Tools. - Google Patents

Improvements in Percussive Rock Drills and like Fluid Pressure Operated Tools.

Info

Publication number
GB109777A
GB109777A GB1080617A GB1080617A GB109777A GB 109777 A GB109777 A GB 109777A GB 1080617 A GB1080617 A GB 1080617A GB 1080617 A GB1080617 A GB 1080617A GB 109777 A GB109777 A GB 109777A
Authority
GB
United Kingdom
Prior art keywords
piston
port
controlled
fluid pressure
fluid
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
GB1080617A
Inventor
George Henry Turton Rayner
Percy 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
Priority to GB1080617A priority Critical patent/GB109777A/en
Publication of GB109777A publication Critical patent/GB109777A/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25DPERCUSSIVE TOOLS
    • B25D9/00Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D9/14Control devices for the reciprocating piston
    • B25D9/16Valve arrangements therefor
    • B25D9/18Valve 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)
  • Percussive Tools And Related Accessories (AREA)

Abstract

109,777. Rayner, G. H. T., and Rayner, P. July 27, 1917. Fluid-actuated gears.-A percussive rock drill has a differential main piston b, p, the small end of which is constantly subjected to fluid pressure, and the outer large end is intermittently supplied with fluid through a port i controlled by the small end. The other side of the large piston is alternately supplied with fluid pressure controlled by a differential valve having its small end d constantly supplied with fluid pressure, its large end constantly supplied through a small port h in the valve, and its large end also alternately put to exhaust by a piston-controlled port g. Or, in the construction shown in Fig. 3, the port h, Fig. 1, is dispensed with, and the large end alternately put to pressure and exhaust by piston-controlled ports g, g<1>. In Fig. 1, the supply through port c<2> is shown cutoff by a shoulder e on the piston, and the fluid works expansively on both sides of the piston. In Fig. 3, the port c<2> is shown communicating directly with the cylinder. Leakage ports m are provided in the valve chest, and leakage recesses k are provided in the small bore of the main piston. In the construction Fig. 1, k constantly communicates with the atmosphere; in the construction Fig. 3, k alternately communicates with the atmosphere through a port controlled by a recess in the valve. Each cylinder has a piston-controlled exhaust f,
GB1080617A 1917-07-27 1917-07-27 Improvements in Percussive Rock Drills and like Fluid Pressure Operated Tools. Expired GB109777A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1080617A GB109777A (en) 1917-07-27 1917-07-27 Improvements in Percussive Rock Drills and like Fluid Pressure Operated Tools.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1080617A GB109777A (en) 1917-07-27 1917-07-27 Improvements in Percussive Rock Drills and like Fluid Pressure Operated Tools.

Publications (1)

Publication Number Publication Date
GB109777A true GB109777A (en) 1917-09-27

Family

ID=32248227

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1080617A Expired GB109777A (en) 1917-07-27 1917-07-27 Improvements in Percussive Rock Drills and like Fluid Pressure Operated Tools.

Country Status (1)

Country Link
GB (1) GB109777A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103410432A (en) * 2013-08-22 2013-11-27 张永忠 Hexagonal drilling machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103410432A (en) * 2013-08-22 2013-11-27 张永忠 Hexagonal drilling machine
CN103410432B (en) * 2013-08-22 2015-12-30 舒泳军 Hexagonal bore machine

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