Hand tool

Details Hand tool Hand tool

1990-08-20

1991-06-18

Bishop, Steven C.

Cutting by use of rotating axially moving tool

Tool or tool-support with torque-applying ratchet

With thrust applying means

74127, 81 5742, 81DIG2, 408125, 408139, B23B 4506, B25B 1506

Patent

active

050245651

ABSTRACT:
A hand tool can remove burrs from an aperture in a workpiece. The tool has a hollow handle and a shaft rotatably mounted in the handle to reciprocate axially therein. The tool has a thruster for urging the shaft to extend axially. A rider is mounted in the handle for engaging and rotating the shaft as it extends axially from the handle. This rider can allow axial retraction of the shaft into the handle without rotation. A deburring bit (e.g. a countersink bit) is mounted at an outer end of the shaft. Thus the bit turns when the shaft extends as the handle withdraws from the workpiece.

REFERENCES:
patent: 1744921 (1930-01-01), Robarts
patent: 1937645 (1933-01-01), Fegley et al.
patent: 2337514 (1940-12-01), Wilcox
patent: 2354735 (1944-08-01), Bensinger
patent: 2421901 (1947-06-01), Murad et al.
patent: 2646687 (1951-06-01), De Wald
patent: 2947334 (1960-08-01), Issartel

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