Mast assembly for rotary tool

Details Mast assembly for rotary tool Mast assembly for rotary tool

1987-05-29

1991-10-08

Picard, Leo P.

Electric heating

Metal heating

By arc

219 602, B23K 900

Patent

active

050556541

ABSTRACT:
A tool having a rotating mast assembly 12 is provided which includes a hollow conductive gas transmitting electrode 14 and a non-hygroscopic ceramic shielding tube 12 which is made of at least 94% by weight Al.sub.2 O.sub.3 and has a tensile strength of at least 20,000 P.S.I. and an ability to withstand temperatures in excess of 1500.degree. C.

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patent: 4047656 (1977-09-01), McCombs
patent: 4510372 (1985-04-01), Kobuck
patent: 4575612 (1986-03-01), Prunier
patent: 4580028 (1986-04-01), Kobuck
Metals Handbook, 8th Edition, vol. 6, Welding and Brazing, pp. 116-117, American Society for Metals, 1974.

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