GB191012324A - Improvements in Valves for Percussive Rock Drills, Pneumatic Hammers, Pneumatic Hammer Drills, Direct Acting Pumps and Engines. - Google Patents
Improvements in Valves for Percussive Rock Drills, Pneumatic Hammers, Pneumatic Hammer Drills, Direct Acting Pumps and Engines.Info
- Publication number
- GB191012324A GB191012324A GB191012324DA GB191012324A GB 191012324 A GB191012324 A GB 191012324A GB 191012324D A GB191012324D A GB 191012324DA GB 191012324 A GB191012324 A GB 191012324A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- casing
- piston
- ports
- exhaust
- 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
-
- 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)
- Percussive Tools And Related Accessories (AREA)
Abstract
12,324. Daw, A. W., and Daw, Z. W. May 19. Fluid-actuated gears. -Relates to the distribution of motive fluid in percussive rock-drills, hammers, direct-acting pumps andengines by the class of valve described in Specification 18,027/07. Referring to Figs. 1, 2, and 3, the piston valve 2 is formed with annular recesses 3, 4, and with end cylinders 5 in which work pistons 7 on the ends of the casing 1. The casing is preferably fitted with a liner 1<a> formed with a supply port 9, branches 11, 12, and exhaust ports 10, 10<a>, 13, 14. The ports 13, 14 lead from the ends of the casing 1 to the opposite ends of the main cylinder 20 by branches 13<a>, 13<b>, 14<a>, 14<b>, as shown in Fig. 2. In operation, with the valve in the position of Fig. 1, fluid is entering the left hand end of the main cylinder by the recess 3 and port 11. When the piston 15 uncovers the port 14<b>, fluid is admitted through the passage 14 to the right-hand end of the valve cylinder to throw over the valve. At the same time, the left-hand end of the valve cylinder is put in communication with exhaust by the opening-up of the passages 13, 13<a>, and 10<c> through the annular recesses 16 in the piston 15. In order to lock the valve in each operative position, ports lead from the end cylinders 5 of the valve to the recesses 3, 4, which are each alternately open to exhaust and supply. The arrangement of the cylinders 5 and pistons 7 may be reversed. In cases where the main piston is not formed with a recess 16, a small port at each end of the valve casing is open to exhaust continuously. In modifications, the valve casing is arranged at the end of, and perpendicular to, the main cylinder. The Specification describes the method of boring-out the ports and passages especially in cases where the valve casing and main cylinder are cast or forged in one piece.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB191012324T | 1910-05-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB191012324A true GB191012324A (en) | 1911-03-30 |
Family
ID=32638094
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB191012324D Expired GB191012324A (en) | 1910-05-19 | 1910-05-19 | Improvements in Valves for Percussive Rock Drills, Pneumatic Hammers, Pneumatic Hammer Drills, Direct Acting Pumps and Engines. |
GB191027238D Expired GB191027238A (en) | 1910-05-19 | 1910-11-23 | Improvements in and connected with the Valves for Percussive Rock Drills, Pneumatic Hammers, Pneumatic Hammer Drills, Direct Acting Pumps and Engines. |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB191027238D Expired GB191027238A (en) | 1910-05-19 | 1910-11-23 | Improvements in and connected with the Valves for Percussive Rock Drills, Pneumatic Hammers, Pneumatic Hammer Drills, Direct Acting Pumps and Engines. |
Country Status (1)
Country | Link |
---|---|
GB (2) | GB191012324A (en) |
-
1910
- 1910-05-19 GB GB191012324D patent/GB191012324A/en not_active Expired
- 1910-11-23 GB GB191027238D patent/GB191027238A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB191027238A (en) | 1911-11-23 |
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