Pilot adaptor for flat wood boring bits
US4512691A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 19, 1983 |
| Grant date | Apr 23, 1985 |
| Priority date | — |
| Expiry date | May 19, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T408/8923
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A pilot adaptor for a flat wood boring bit having a shank extending to two parallel flattened sides and with an axially aligned orifice extending therebetween, the pilot adaptor being implemented by an elongated rectangular sheet metal member folded over centrally thereof for two parallel legs for receiving the parallel flattened sides of the flat wood boring bits therebetween, in which the parallel legs have diagonally opposite edges spaced apart the diameter of the pilot hole so that they are received in the pilot hole. At least one centrally aligned aperture may extend through one of the parallel legs coaxially with at least one portion punched and lanced out to form a single thread so that a sheet metal screw may extend through the aperture and orifice in the flat wood boring bits and into the lanced out portion to retain the pilot adaptor to the flat wood boring bit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.