Spindle lock and chipping mechanism for hammer drill
US6550546B2 · kind B2 · utility
1,502Cited by
21References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 1, 2001 |
| Grant date | Apr 22, 2003 |
| Priority date | — |
| Expiry date | May 1, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25D2216/0046
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A hammer drill has a motor which drives an axially displaceable intermediate gear mounted in an intermediate gear arrangement. An impact mechanism is formed by including interacting impact cams between either the intermediate gear and the housing, or the motor armature shaft and the housing to generate a reciprocating motion on an output spindle or shaft. A spindle locking mechanism is included which causes an intermediate gear to be disengageable with respect to the output shaft, while still permitting the impact mechanism to be engaged. Such an arrangement allows the hammer drill to operate in a hammer-only or chipping mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.