Threading attachment

Details Threading attachment Threading attachment

1979-12-03

1981-07-07

Hinson, Harrison L.

Cutting by use of rotating axially moving tool

Tool or tool-support with torque-applying clutch

10 89F, 192 67R, B23Q 522, F16D 1104, B21K 156

Patent

active

042772095

ABSTRACT:
A reversible driver for a threading tool, such as a tap or die, is disclosed. The driver has rotary input and output members with a forward clutch connected therebetween and a reverse clutch connected through reverse gearing between the input and the output members. Each clutch has drive and driven clutch elements and a first spring urges both forward and reverse clutches toward engagement. A second spring is stronger than the first spring and urges the forward clutch toward engagement so that a tap rotated by the output member will tap a hole in a workpiece until the forward clutch is released. Each clutch utilizes a plurality of substantially hemispherical projections engaging longitudinal abutments as a form of dog clutch. The foregoing abstract is merely a resume of one general application, is not a complete discussion of all principles of operation or applications, and is not to be construed as a limitation on the scope of the claimed subject matter.

REFERENCES:
patent: 3002206 (1961-10-01), Johnson
patent: 3717892 (1973-02-01), Johnson
patent: 3946844 (1976-03-01), Johnson
patent: 3999642 (1976-12-01), Johnson
patent: 4014421 (1977-03-01), Johnson
patent: 4029429 (1977-06-01), Johnson

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