Hammer drill
US4189011A · kind A · utility
4Cited by
7References
24Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 4, 1978 |
| Grant date | Feb 19, 1980 |
| Priority date | — |
| Expiry date | Apr 4, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25D2211/067
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A hammer drill has a housing and a spindle mounted on the housing for rotating and reciprocating longitudinal movement. The spindle has a leading end provided with an end portion extending outward through a hole in the housing, facing a wall to be drilled. The housing is provided with a motor rotating the spindle and a member which subjects the spindle, when the latter rotates, to reciprocating longitudinal movement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.