Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Kunihiko Daido0
Hirokatsu Maeda0
Masashi Matsuoka0
Yosinori Shimomura0
Date of Patent
May 5, 2015
Patent Application Number
13580788
Date Filed
December 9, 2010
Patent Citations Received
Patent Primary Examiner
Patent abstract
A ball valve which can suppress the increasing of processing labor time and reliably prevent simultaneous rotation of a ball seat and a ball when the ball is rotated by handle manipulation is provided. The valve body 2 is formed of a hard material such as stainless steel, the ball seat is formed of a relatively soft material such as a fluorine resin, and a protrusion 18 is formed on a ball seat support surface 13 of the valve body 2 made of a hard material so as to bite into the ball seat 4.
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