Chuck for hammerdrills and the like
US4116454A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 25, 1977 |
| Grant date | Sep 26, 1978 |
| Priority date | — |
| Expiry date | Mar 25, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T279/17632
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A chuck for hammerdrills and the like is provided with a chuck body; a plurality of jaws on said chuck body for engaging and holding a tool bit; and means connected to said jaws for adjusting the engagement of said jaws with the tool bit, said means comprising a guide sleeve having a main portion with an outer and inner surface, said main portion defining a central axis therethrough, a toothed gear encircled by said sleeve and having a circumferentially extending groove having a roughened surface facing the inner surface of said sleeve, said sleeve including at least one inwardly offset locking portion having an outer and inner surface which are inwardly offset with respect to the main portion of said sleeve, said inwardly offset portion projecting into said groove.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.