GB236348A - Improvements in portable impact tool - Google Patents
Improvements in portable impact toolInfo
- Publication number
- GB236348A GB236348A GB1287524A GB1287524A GB236348A GB 236348 A GB236348 A GB 236348A GB 1287524 A GB1287524 A GB 1287524A GB 1287524 A GB1287524 A GB 1287524A GB 236348 A GB236348 A GB 236348A
- Authority
- GB
- United Kingdom
- Prior art keywords
- flywheel
- piston
- tool
- cam
- hammer
- 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
- B25D9/06—Means for driving the impulse member
- B25D9/10—Means for driving the impulse member comprising a built-in internal-combustion engine
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Percussive Tools And Related Accessories (AREA)
Abstract
236,348. Roberts, E. W. May 26, 1924. Percussive hand tools. - In a portable internal-combustion percussive tool, the hammer piston 5 is connected to a transverse flywheel 8 by means of a cross-pin 7 working between cams 15, 16 carried by the heels of the flywheel, the cam groove being widened at the point shown in Fig. 4, so as to leave the hammer free immediately after the moment of impact. The cam 15 is shaped to give four strokes of the piston for each complete revolution, the cam 16 being used only at starting by hand. The charge entering past a, handcontrolled throttle 40, operated by means of a wire 41, is compressed by the front end of the piston and transferred through an axial passage 6 past a valve 21. Exhaust takes place through ports 47. Ignition contacts 44, 46 are attached to the flywheel and cylinder respectively. The flywheel is formed with oblique blades 8<a>, producing a current of cooling air under a non-conducting hood 32. The tool shank 25 is held flush with its socket 4 by the action of a spring 28, and is not struck by the hammer piston until the tool is pressed against the work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1287524A GB236348A (en) | 1924-05-26 | 1924-05-26 | Improvements in portable impact tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1287524A GB236348A (en) | 1924-05-26 | 1924-05-26 | Improvements in portable impact tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB236348A true GB236348A (en) | 1925-07-09 |
Family
ID=10012732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1287524A Expired GB236348A (en) | 1924-05-26 | 1924-05-26 | Improvements in portable impact tool |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB236348A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102770246A (en) * | 2010-01-15 | 2012-11-07 | 威克纽森产品有限两合公司 | Drill hammer and/or impact hammer having free convection cooling |
-
1924
- 1924-05-26 GB GB1287524A patent/GB236348A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102770246A (en) * | 2010-01-15 | 2012-11-07 | 威克纽森产品有限两合公司 | Drill hammer and/or impact hammer having free convection cooling |
| CN102770246B (en) * | 2010-01-15 | 2015-09-16 | 威克纽森产品有限两合公司 | There is boring and/or the jump bit of free convection cooling |
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