Stock material or miscellaneous articles – All metal or with adjacent metals – Helical or with helical component
Patent
1983-11-29
1986-04-22
Rutledge, L. Dewayne
Stock material or miscellaneous articles
All metal or with adjacent metals
Helical or with helical component
72103, 52698, 52740, 52737, 10152R, 411411, E04C 500, B21H 302
Patent
active
045842477
ABSTRACT:
A method of selecting deformed bar for direct rolling of a thread thereon and also a method of threading such deformed bar. The method comprising rolling a preselected thread onto selected deformed bar without machining the bar in preparation. The bar selection is made so that the average cross-sectional area of the bar with the formed thread is substantially equal to that of the unthreaded portions of the bar. The formed thread is of continuous and substantially constant pitch circle. The method is particularly applicable in manufacture of rock bolts and anchor bolts from hot rolled deformed bar.
REFERENCES:
patent: 3469491 (1969-09-01), Munsey
patent: 3626733 (1971-12-01), Zook et al.
patent: 4137686 (1979-02-01), Kern
patent: 4303354 (1981-12-01), McDowell
Journal of the American Concrete Institute, Nov. 1949, pp. 162, 163.
Horwitz Lester
Rutledge L. Dewayne
The Titan Manufacturing Co. Pty. Ltd.
Zimmerman John J.
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