Drill hammer
US6112830A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 8, 1999 |
| Grant date | Sep 5, 2000 |
| Priority date | — |
| Expiry date | Nov 8, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25D2217/0088
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The invention concerns a drill hammer having an air cushion percussion mechanism with which an energizing bushing (24) is disposed concentric to the drill tool axis (10) and forms a cavity (26) containing the air cushion in which a percussion piston (28) can move back and forth, and with a wobble drive device (34) for moving the energizing bushing (24) back and forth in the direction of the drill tool axis (10), the rotation element (36) of which driving the nutating disk (42) being disposed for rotational drive parallel to the drill tool axis (10) at a separation therefrom. In order to increase the smoothness of running of the drill hammer, a weight (50) is disposed under restrictive guidance for linear back and forth motion parallel to the drill tool axis (10) in response to the action of the nutating disk (42), at that side of the nutating disk (42) lying diametrically across from the energizing bushing (24).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.