B - Operations – Transporting – 23 – B
Patent
B - Operations, Transporting
23
B
77/30
B23B 51/00 (2006.01) B25B 21/00 (2006.01) B25F 3/00 (2006.01)
Patent
CA 1141204
Case 3397-00 DRILL BIT WITH FASTENER-DRIVING COLLAR ASSEMBLY ABSTRACT A two piece hole-drilling and fastener-driving assembly consists of a three-sectioned drill bit and a three-sectioned drive collar. The drill bit has a fluted drilling section, a hexagonal driving section and a tapered section adapted to be received in a complementarily shape chuck of a rotary hammer drill. The drive collar has a first hexagonal portion which mates with the hexa- gonal drill bit section and Is driven thereby. A second tubular portion receives the drilling section when the hexagonal portions are engaged. A third portion includes a fastener-engaging re- cess. This portion may take the form of a removable socket and the collar provided with a spring-biased ball retainer to hold the socket thereon and a second such retainer to hold the collar on the drill bit. The drill bit is inserted in the rotary hammer chuck and a hole is drilled in the workpiece. The drive collar is then slipped over the drill bit and a self-tapping fastener driven into the just-drilled hole.
347034
Ernst Richard J.
Williams Elbert E.
Illinois Tool Works Inc.
Meredith & Finlayson
LandOfFree
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