GB191416035A - Improvements in Valve Gear for Rock Drilling and like Machines. - Google Patents
Improvements in Valve Gear for Rock Drilling and like Machines.Info
- Publication number
- GB191416035A GB191416035A GB191416035DA GB191416035A GB 191416035 A GB191416035 A GB 191416035A GB 191416035D A GB191416035D A GB 191416035DA GB 191416035 A GB191416035 A GB 191416035A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- exhaust
- construction
- recess
- cylinder
- 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)
- Earth Drilling (AREA)
Abstract
16,035. Stephens, W. C. July 4. [Cognate Applications, 23,434/14 and 76/15.] Percussive hand tools. -A rock drill or other percussive tool is provided with a fluidactuated differential valve c which is hollow and works on a projection e<1> in line with the cylinder. One face of the valve is constantly subjected to fluid pressure to move the valve in one direction, and the valve is moved in the other direction by fluid compressed by the piston and supplied through a leakage port n, Fig. 2. In the construction shown in Figs. 1 and 2, the valve is provided with three heads k, k<1>, k<2> and live-fluid and exhaust grooves l, l<1>. The recess m<1> in the valve is in constant communication with the air-supply, and the annular end of the valve is open to the exhaust through a small port o. Pressure fluid is supplied to the ports g, g<1> through passages f opening into a space f<0> communicating with the air supply. The ports h, i, j communicate respectively with the front of the cylinder, back of the cylinder, and atmosphere. The main exhaust is shown at j in the position shown, an auxiliary exhaust from the front end of the cylinder takes place through the passages h<2>, h<1>, h, p. A casing provided with a cock encloses the valve-chest. Modifications of the above construction are described. In one construction, the projection e<1> is solid, the recess m<1> communicates with the exhaust through a port connected to the recess l, and the annular end of the valve is supplied with fluid pressure. In another construction, the valve has one recess only, which alternately communicates with the supply and exhaust through passages controlled by the heads of the valve. In a modification of this construction, the supply passes through radial ports in the valve controlled by the hollow projection e'.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB191416035T | 1914-07-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB191416035A true GB191416035A (en) | 1915-07-05 |
Family
ID=32585347
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB191416035D Expired GB191416035A (en) | 1914-07-04 | 1914-07-04 | Improvements in Valve Gear for Rock Drilling and like Machines. |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB191416035A (en) |
-
1914
- 1914-07-04 GB GB191416035D patent/GB191416035A/en not_active Expired
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB191416035A (en) | Improvements in Valve Gear for Rock Drilling and like Machines. | |
US1368470A (en) | Hammer-drill | |
US1248966A (en) | Valve for percussive tools. | |
GB109777A (en) | Improvements in Percussive Rock Drills and like Fluid Pressure Operated Tools. | |
US908920A (en) | Motor-actuated hand-tool. | |
US826456A (en) | Engine for rock-drilling machines. | |
US631591A (en) | Coal cutting engine. | |
US1236701A (en) | Pneumatic tool. | |
US661686A (en) | Engine for rock-drills. | |
GB191205549A (en) | Improvements in Valve Apparatus for Percussive Rock Drills, Tools and the like. | |
GB191400617A (en) | Improvements in Valve Apparatus for Percussive Rock Drills and the like. | |
US632261A (en) | Pneumatic hammer. | |
GB191406580A (en) | Improvements in Valves and Valve Gear for Rock Drills. | |
GB115605A (en) | Improvements in Valve Apparatus for Rock Drills and the like Fluid Pressure Operated Tools. | |
GB191012324A (en) | Improvements in Valves for Percussive Rock Drills, Pneumatic Hammers, Pneumatic Hammer Drills, Direct Acting Pumps and Engines. | |
GB110411A (en) | Improvements in Valve Gear for Rock Drills and other Percussion Tools. | |
GB191117012A (en) | Improvements relating to Fluid Pressure Operated Hammer Tools. | |
GB191208198A (en) | Improvements relating to Pneumatically Driven Tools. | |
GB191223099A (en) | Improvements in Pneumatic Hammers and the like Tools. | |
GB191305493A (en) | Improvements in and connected with Hammers Actuated by Air or Fluid. | |
GB191018165A (en) | Improvements relating to Rock Drills, and other Percussive Tools. | |
GB191413726A (en) | Improvements in Valve Apparatus for Percussive Rock Drills, Tools and the like. | |
GB190318541A (en) | Improvements in the Valve Gear of Rock Boring and other Machines Driven by Compressed Air, Compressed Gases, Steam and like Mediums. | |
GB191012144A (en) | Improvements in and relating to Mechanism for Actuating the Drill used in Mining Operations and for Exploring Rock in Blasting Work. | |
GB190401340A (en) | Improvements in and relating to Rock Drills or the like. |