Hollow shaft and method of making same

Details Hollow shaft and method of making same Hollow shaft and method of making same

1995-03-03

1999-02-16

Ryan, Patrick

Metal fusion bonding

Process

Encasing a rodlike core within a substantially coextensive...

228137, 228150, 228154, 22826242, 22826243, 148529, B23K 116, B23K 119, B23K 3102

Patent

active

058711406

ABSTRACT:
The invention provides methods of manufacturing stainless steel tubing, pipe and shafts by utilizing air hardenable stainless steel. Such pipe, tubing and shafts have the important characteristics of low weight, shaft flex, torque, bend point and strength and have many uses. The shafts include a plurality of air hardenable metal segments of selected length, thickness and shape that are assembled into a shaft. This assembly is subsequently contacted with a brazing material and then placed into a controlled, non-oxidative atmosphere furnace of a sufficient temperature such that the assembly is simultaneously brazed and hardened. The tubing can include having a brazed lock seam which provides strength. The present invention further provides reinforcing members that are also brazed within the shaft, tubing or pipe while the outer piece is hardened.

REFERENCES:
patent: 1670639 (1928-05-01), Shipley et al.
patent: 3963162 (1976-06-01), Taguchi et al.
patent: 4125260 (1978-11-01), Kanne et al.
patent: 5485948 (1996-01-01), McCrink
"Brazing of Stainless Steels," Metals Handbook, 9th Ed., 1983, pp. 1001-1013.

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