GB389318A - Improvements in pneumatic percussive tools - Google Patents
Improvements in pneumatic percussive toolsInfo
- Publication number
- GB389318A GB389318A GB15016/32A GB1501632A GB389318A GB 389318 A GB389318 A GB 389318A GB 15016/32 A GB15016/32 A GB 15016/32A GB 1501632 A GB1501632 A GB 1501632A GB 389318 A GB389318 A GB 389318A
- Authority
- GB
- United Kingdom
- Prior art keywords
- air
- valve
- piston
- stroke
- passages
- 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
- 230000000994 depressogenic effect Effects 0.000 abstract 2
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
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
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Percussive Tools And Related Accessories (AREA)
Abstract
389,318. Percussive tools. AKTIEBOLAGET ATLAS DIESEL, Sickle, near Stockholm. May 26, 1932, No. 15016. Convention date, May 28, 1931. [Class 124.] The return stroke of the piston of a percussive drill is made entirely by the energy stored in the air cushion formed in front of the piston. To start the tool, air from the inlet 9 passes through passages 11, 41, 43 and raises the piston 2. When this reaches the upper limit of its stroke, the valve 6 is raised by the trapped air and live air enters through passages 11, 12. The trapped air has meanwhile depressed the auxiliary valves 16, 40 closing the exhaust 21 and the front supply 43. Port 42 being very restricted the valve 43 remains depressed. Live air passing through 14 closes the valve 6 and the expanding air completes the stroke, exhaust taking place through ports 13. The return stroke is made by the air cushion 44 since port 43 is closed. In a modification the auxiliary valves are dispensed with and the starting supply to the front end is admitted by an intermediate position of the throttle valve.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE389318X | 1931-05-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB389318A true GB389318A (en) | 1933-03-16 |
Family
ID=20309288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB15016/32A Expired GB389318A (en) | 1931-05-28 | 1932-05-26 | Improvements in pneumatic percussive tools |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB389318A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2619938A (en) * | 1949-08-08 | 1952-12-02 | Kennecott Copper Corp | Fluid pressure actuated motor |
| US2624177A (en) * | 1945-02-08 | 1953-01-06 | Charles F Warren Jr | Hydraulic impact tool |
-
1932
- 1932-05-26 GB GB15016/32A patent/GB389318A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2624177A (en) * | 1945-02-08 | 1953-01-06 | Charles F Warren Jr | Hydraulic impact tool |
| US2619938A (en) * | 1949-08-08 | 1952-12-02 | Kennecott Copper Corp | Fluid pressure actuated motor |
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