Locking drill chuck
US6991238B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 14, 2004 |
| Grant date | Jan 31, 2006 |
| Priority date | — |
| Expiry date | Jul 14, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T279/17632
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A locking drill chuck comprises a chuck body, a plurality of jaws, a nut, a nut jacket, a front sleeve, and a rear sleeve, wherein the chuck body has an axial hole at its rear end for engaging with a driving shaft of a driving means, and the rear sleeve close fits with the outer circumference of the rear end of the chuck body, the jaws are separately fitted in a plurality of corresponding inclined holes equally departed away from each other in the chuck body, the nut engages with the jaws, the locking drill chuck further comprises a locking sleeve provided between the front sleeve and the rear sleeve, and a locking assembly provided between the nut and a stop plane of the chuck body, the locking assembly comprises a locking cap, rolling members, and a locking plate, wherein the locking plate has a plurality of helical grooves with helix angle in an end plane thereof, the rolling members are received in the helical grooves, the locking cap has resilient tabs securing the locking plate together with the plurality of rolling members, and the locking sleeve securely connected to the locking plate. The locking drill chuck in accordance with the present invention is reasonable in structu…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.