JPS642879A - Impacting tool - Google Patents
Impacting toolInfo
- Publication number
- JPS642879A JPS642879A JP15443787A JP15443787A JPS642879A JP S642879 A JPS642879 A JP S642879A JP 15443787 A JP15443787 A JP 15443787A JP 15443787 A JP15443787 A JP 15443787A JP S642879 A JPS642879 A JP S642879A
- Authority
- JP
- Japan
- Prior art keywords
- bit
- exhaust
- duct
- hole
- wind
- 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.)
- Granted
Links
Landscapes
- Percussive Tools And Related Accessories (AREA)
Abstract
PURPOSE: To effectively discharge the powder generated by a bit and to efficiently bore a hole with the bit by providing a duct for guiding the cooling exhaust wind of a motor to the vicinity of the bit.
CONSTITUTION: A motor 2 is driven to rotate a fan 4, and air is sucked into a frame 6 and exhausted to an exhaust port 5. The exhaust air is guided to the vicinity of a bit 1 from the exhaust port 5 via a duct 8. The exhaust wind is fed from one side of the bit 1 by this guidance, and the wind pressure applied to the other side is generated to accelerate the exhaust of powder from a bored hole together with a screw formed on the bit 1. When the hole with the prescribed depth is bored in concrete by the bit 1, the tip section of the duct 8 collides with the concrete to regulate the further advance of the bit 1.
COPYRIGHT: (C)1989,JPO
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15443787A JPH0763946B2 (en) | 1987-06-23 | 1987-06-23 | Impact tool |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15443787A JPH0763946B2 (en) | 1987-06-23 | 1987-06-23 | Impact tool |
Publications (3)
Publication Number | Publication Date |
---|---|
JPH012879A JPH012879A (en) | 1989-01-06 |
JPS642879A true JPS642879A (en) | 1989-01-06 |
JPH0763946B2 JPH0763946B2 (en) | 1995-07-12 |
Family
ID=15584173
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15443787A Expired - Fee Related JPH0763946B2 (en) | 1987-06-23 | 1987-06-23 | Impact tool |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0763946B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009241244A (en) * | 2008-03-31 | 2009-10-22 | Hitachi Koki Co Ltd | Boring tool |
JP2012171038A (en) * | 2011-02-21 | 2012-09-10 | Hitachi Koki Co Ltd | Drilling tool |
KR20210004714A (en) * | 2019-07-05 | 2021-01-13 | (주) 대동이엔지 | law noise derlling apparatus and rock crushing method utilizing the same |
-
1987
- 1987-06-23 JP JP15443787A patent/JPH0763946B2/en not_active Expired - Fee Related
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009241244A (en) * | 2008-03-31 | 2009-10-22 | Hitachi Koki Co Ltd | Boring tool |
JP2012171038A (en) * | 2011-02-21 | 2012-09-10 | Hitachi Koki Co Ltd | Drilling tool |
KR20210004714A (en) * | 2019-07-05 | 2021-01-13 | (주) 대동이엔지 | law noise derlling apparatus and rock crushing method utilizing the same |
Also Published As
Publication number | Publication date |
---|---|
JPH0763946B2 (en) | 1995-07-12 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |