Semi-circular thread tap

Details Semi-circular thread tap Semi-circular thread tap

1981-05-26

1982-02-23

Hinson, Harrison L.

Cutting by use of rotating axially moving tool

Tool or tool with support

With pitch-stabilizing ridge

10141R, 76101B, B23B 5100, B21K 2100, B23G 506

Patent

active

043166830

ABSTRACT:
A tap for cutting threads in a hole which comprises a semi-circular tap body with threads cut in the circular surface extending to a diametrical surface. Modified embodiments include a rake angle at the cutting ends of the tap threads and a drill point to allow the device to serve as a drill and tap.

REFERENCES:
patent: 117082 (1871-07-01), Kraus
patent: 428490 (1890-05-01), Hoerle, Jr.
patent: 1232099 (1917-07-01), Schoenert
patent: 1908575 (1933-05-01), Tucker
patent: 2033557 (1936-03-01), Tucker
patent: 2684492 (1954-07-01), Miner et al.
patent: 3336614 (1967-08-01), Benjamin
patent: 4090808 (1978-05-01), Nannen
patent: 4123194 (1978-10-01), Cave

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