Cutting by use of rotating axially moving tool – With work-engaging structure other than tool or tool-support – Adjustable – tool-guiding jig
Patent
1995-05-02
1997-01-07
Howell, Daniel W.
Cutting by use of rotating axially moving tool
With work-engaging structure other than tool or tool-support
Adjustable, tool-guiding jig
408 97, B23B 4900
Patent
active
055909868
ABSTRACT:
A drill jig for locating holes to be drilled in a workpiece includes an elongated guiding block, a guiding rod and a positioning block. A plurality of through-bores are formed in the guiding block and are longitudinally aligned. A bushing and a positioning pin extend removably through two of the through-bores. Each of the threaded holes is provided with a locking screw so that the bushing and the positioning pin can be releasably locked in the two through-bores by the corresponding locking screws. The guiding rod is connected to a side face of the guiding block and extends in a direction that is transverse to the longitudinal direction of the guiding block. The positioning block has an abutting plate depending from the bottom face of the positioning block, a threaded bore formed in the top face of the positioning block, and a through hole through which the guiding rod slidably passes. The through hole communicates with the threaded bore in a direction that is transverse to the axis of the threaded bore. A locking bolt is threaded into the threaded bore so that the positioning block can be locked releasably to the guiding rod.
REFERENCES:
patent: 4194861 (1980-03-01), Keller
patent: 4752162 (1988-06-01), Groh
patent: 4952101 (1990-08-01), Coombs
patent: 5054969 (1991-10-01), Gibson et al.
patent: 5308199 (1994-05-01), Juang
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