Keyless chuck for rotary tool
US4695065A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 24, 1986 |
| Grant date | Sep 22, 1987 |
| Priority date | — |
| Expiry date | Dec 24, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T279/17649
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A keyless chuck for a rotary tool comprises a chuck body which is adapted to be coupled at its one end to a drive spindle of a drive source and coupled at the other end to a tool bit for establishing a driving connection from the drive source to the tool bit. Relatively rotatable to the chuck body is a handle ring which is operatively connected to a set of gripping jaws for tightening the gripping jaws on the tool bit upon being rotated in one direction and loosening the same upon being rotated in the opposite direction. The handle ring is disposed on the chuck body in such a manner as to coincide the rotating direction of the handle ring for tightening the gripping jaws with the reverse rotating direction of the chuck body for removing the tool bit from a workpiece. A clutch interconnects the handle ring and the chuck body in order to rotatively fix the handle ring to the chuck body when the latter is driven to rotate in the reverse direction of removing the tool bit, causing the handle ring to positively rotate in the direction of tightening the gripping jaws and thus preventing it from counter-rotating in the direction of loosening the tool bit when there develops an interaction…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.