Flexible shaft plug insert
US6790144B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 12, 2002 |
| Grant date | Sep 14, 2004 |
| Priority date | — |
| Expiry date | Sep 25, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25F3/00
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An apparatus for preventing disengagement of an axially movable and rotatable flexible core of a flexible shaft attachment, which has a driven end and a handpiece end, and the driven end has a ferrule for attachment to a rotary power tool. The rotary power tool has an exteriorly threaded hollow output shaft with a first predetermined interior depth for receiving the base end of tool bits that can be used with the power tool, and the flexible shaft attachment has a drive cap attached to the output shaft, and the drive cap has an aperture sized and shaped for receiving the core in fixed rotating engagement. The apparatus includes a generally cylindrical stop plug having an open end portion and a closed end portion, and a cylindrical chamber extending from said open end portion to said closed end portion. The open end portion has an outward extension adapted to engage the end of the output shaft and be held in place by the attached drive cap, and the chamber is capable of receiving the core therein. The distance from the open end portion to said closed end portion is less than the first predetermined interior depth, and the stop plug thereby limiting the depth of penetration of the co…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.