Metal fusion bonding – Heat shield
Patent
1990-01-18
1990-07-31
Seidel, Richard K.
Metal fusion bonding
Heat shield
228214, 228 21, 228 57, 219 591, B23K 932, B23K 2802, F16P 106
Patent
active
049444441
ABSTRACT:
The invention provides a portable welding or cutting shield to assist in preventing welding or burning by-products from contaminating or damaging the inside surfaces of a pipe. The portable welding shield comprises a shield assembly for capturing the by-products released within and traveling along the length of the pipe, a leg assembly for supporting the shield assembly within the pipe and a splatter target that extends upwardly from the shield assembly. The leg assembly includes fixed first and second legs, and an adjustable third leg. The adjustable leg includes a screw actuator that allows the length of the leg to be radially adjusted so as to allow the leg assembly to be brought in and out of engagement with the inside diameter of the pipe. The shield assembly includes multiple flexible pieces of flame resistant fabric sandwiched between a top and a bottom pair of semi-circular plates. The pieces of fabric have a diameter greater than that of the inner diameter of the pipe such that the fabric contacts substantially the entire inside diameter of the pipe at a particular location along the length of the pipe. The semi-circular plates are capable of folding inwardly upon themselves so as to facilitate the insertion of the shield assembly within the pipe. Located above the shield assembly is a splatter target. The splatter target serves to capture by-products traveling across the inside diameter of the pipe.
REFERENCES:
patent: 2410306 (1946-10-01), Romberg
patent: 2823634 (1958-02-01), Barth
patent: 3095844 (1963-07-01), Thielsch
patent: 4159072 (1979-06-01), Lajoie et al.
patent: 4355664 (1982-10-01), Cook et al.
patent: 4496093 (1985-01-01), Taylor, Jr.
Heinrich Samuel M.
MK-Ferguson Company
Seidel Richard K.
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