Method of manufacturing a blank raw material for a hose end fitting
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United States of America Patent
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-
Nov 28, 2000
Grant Date -
N/A
app pub date -
Oct 14, 1998
filing date -
Oct 14, 1997
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A method of manufacturing a blank raw material for a hose end fitting includes several steps, The method includes providing a rod-shaped material having a socket end and a screw-connecting end, and forming at the socket end of the rod-shaped material a pipe-shaped socket portion and a rod-shaped nipple portion surrounded by the pipe-shaped socket portion. A flange portion is formed having a diameter larger than that of the socket portion in an intermediate portion of the rod-shaped material by fitting a second pipe-shaped mold to the screw-connecting end so as to sandwich and compress the intermediate portion between the first pipe-shaped mold and the second pipe-shaped molds A screw-connecting portion is formed at the screw-connecting end by inserting a punch in a center portion of the rod-shaped material when an external periphery of the rod-shaped material is supported by the second pipe-shaped mold. A rod-shaped nipple having a through-hole extending to a bottom surface of the screw-connecting portion is formed by fitting a pipe-shaped punch between the pipe-shaped socket portion and the rod-shaped nipple portion.
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