Cutting by use of rotating axially moving tool – Tool or tool with support – With pitch-stabilizing ridge
Patent
1988-09-14
1990-05-22
Combs, E. Michael
Cutting by use of rotating axially moving tool
Tool or tool with support
With pitch-stabilizing ridge
10 1B, 10111, 10123P, B23G 126, B23G 500
Patent
active
049273027
ABSTRACT:
A threading device which can cut a uniform and symmetrical screw thread in the outer surface of a round bar or tube includes a die nut having internal cutting threads and two axial holes and a guide ring which includes two axial roll pins extending away from a rear face thereof and which are capable of extending into the axial holes in the die nut without play to align the axis of the guide ring with the axis of the die nut. The guide ring will act to maintain the axis of the die nut coaxial with the axis of a round bar or tube which extends through the bore of the guide ring and contacts the cutting threads in the die nut. The die nut (together with the guide ring) can be manually rotated to cut a screw thread in a round bar or tube by means of a conventional wrench.
REFERENCES:
patent: 311549 (1885-02-01), Wells
patent: 446915 (1891-02-01), Fletcher
patent: 465622 (1891-12-01), Baird
patent: 1613980 (1927-01-01), Boyd
patent: 1844419 (1932-02-01), Borden
patent: 1971230 (1934-08-01), Nikoloff
patent: 2896495 (1959-07-01), Crawford
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