Drill adjustment mechanism for a hammer drill
US5447205A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 27, 1993 |
| Grant date | Sep 5, 1995 |
| Priority date | — |
| Expiry date | Dec 27, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25D2211/064
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An adjusting mechanism for a hammer drill that will switch the drill from conventional drill only mode to a hammer drill mode by rotating an adjusting rod. The generally cylindrical adjusting rod includes an impact cam and an adjacent and smaller drill cam. One of the two cams will be in a position adjacent a thrust ball, which is on the back of the spindle. When the drill cam is rotated into position to contact the thrust ball, a clutch face on an output gear will be held in spaced relation to a clutch face on an impact bushing with a resulting drill only rotational motion of the spindle; when the impact cam is rotated into position adjacent the thrust ball, the two clutch faces will come into engagement with one another and create a hammer drill motion of the spindle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.