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
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)
- 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,
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103410432A (en) * | 2013-08-22 | 2013-11-27 | 张永忠 | Hexagonal drilling machine |
-
1917
- 1917-07-27 GB GB1080617A patent/GB109777A/en not_active Expired
Cited By (2)
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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