Master cylinder apparatus
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United States of America Patent
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Aug 25, 2015
Grant Date -
Jun 6, 2013
app pub date -
Nov 21, 2012
filing date -
Nov 25, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
A master cylinder apparatus A1 includes a master cylinder 1 and a reservoir 3. The master cylinder 1 transduces an input to a brake operator into a brake fluid pressure. The reservoir 3 includes a fluid supply hole 3a that is connected to the master cylinder 1. A base body 10 of the master cylinder 1 includes a first cylinder hole 11a into which a piston is inserted, a reservoir union port 13a to which the fluid supply hole 3a is connected, and a communication hole 13d. The communication hole 13d has one end opening in a bottom surface of the reservoir union port 13a, and the other end opening in an inner circumferential surface of the first cylinder hole 11a. A center axis O3 of the reservoir union port 13a passes through a position being apart from a center axis O1 of the first cylinder hole 11a.
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