Drive bar attachment for threading machines

Details Drive bar attachment for threading machines Drive bar attachment for threading machines

1988-02-22

1989-03-14

Schmidt, Frederick R.

Turning

Lathe for screw cutting

82152, 82169, 279 1A, 279 1C, 279 2R, B23B 100

Patent

active

048116394

ABSTRACT:
An attachment is disclosed for use with a power driven threading machine of the character having a tubular workpiece receiving spindle carrying jaw assemblies which engage and disengage a workpiece in the spindle. During a threading operation, the jaws engage a workpiece and thereafter rotate the workpiece and spindle in one direction about the spindle axis. When the jaws are displaced to release the workpiece, the jaws and spindle are rotated in the opposite direction about the spindle axis. The disclosed attachment is adapted to be received in the threading machine spindle in place of a workpiece to provide a driving coupling such as for an auxiliary tool assembly supported on the threading machine. The attachment is provided with a head which is adapted to be engaged by the jaws to drive the attachment in a direction corresponding to the workpiece threading direction, and the attachment is provided with a one-way torsion spring clutch adapted to engage the interior of the spindle such that the attachment is rotated in the opposite direction when the jaws move out of engagement with the attachment and so drive the spindle. The outer end of the attachment is provided with a coupling arrangement by which the auxiliary tooling can be driven in opposite directions by the attachment.

REFERENCES:
patent: 775579 (1904-11-01), Rich
patent: 1215785 (1917-02-01), Everoad
patent: 2242991 (1941-05-01), Carz
patent: 2890888 (1959-06-01), Damijonaitis
patent: 2916290 (1959-12-01), Skilain
patent: 3127186 (1964-03-01), Van Rensser
patent: 3232629 (1966-02-01), Obear
patent: 3270592 (1966-09-01), Behnke

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