Valve device
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United States of America Patent
Stats
-
Oct 15, 2019
Grant Date -
Feb 1, 2018
app pub date -
Mar 24, 2016
filing date -
Apr 6, 2015
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A valve device includes: a valve having a ball surface having a convex spherical shape, and a first opening opened in the ball surface to allow fluid to pass through; and a seat having an annular shape and opposing the ball surface to be in sliding contact, the seat being pressed against the ball surface, the seat having a second opening to communicate with the first opening. The seat has a sealing surface in a sliding contact with the ball surface at a valve closed time when the ball surface and the second opening overlap with each other, and a seat contact surface in a sliding contact with an opening inner wall surface or an opening end surface of the first opening at a valve opened time when the first opening and the second opening overlap with each other.
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