ENDOSCOPE HAVING PIPE CONNECTION STRUCTURE AND PRODUCING METHOD THEREOF
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United States of America Patent
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Apr 25, 2017
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Jan 18, 2008
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Abstract
An endoscope having a pipe connection structure includes a pipe of a corrosion-resistant alloy material and a piping block of a corrosion-resistant alloy material, the piping block having a pipe insertion hole. An end of the pipe is fitted in the pipe insertion hole, the pipe and the piping block are connected by welding by irradiating a laser beam on the entire circumference of an area where the end of the pipe is fitted in the pipe insertion hole in the piping block, and an axial length of the pipe inserted in the pipe insertion hole is in a range of 0.5 to 2 times a wall thickness of the pipe.
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