Dead stroke reduction valve
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United States of America Patent
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Sep 11, 2012
Grant Date -
N/A
app pub date -
Dec 14, 2008
filing date -
Dec 14, 2008
priority date (Note) -
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Abstract
A vehicle hydraulic master brake cylinder assembly (12) having a housing (14) with a cylindrical bore (16) for retaining primary (18) and secondary (20) pistons to define primary (26) and secondary (28) fluid pressure chambers. Primary (42) and secondary (44) reservoir pots are connected with primary (32, 34, 36, 80) and secondary (48, 50) conduits for respectively conveying hydraulic fluid between a fluid reservoir and the primary and secondary chambers. A valve (76) operates by the secondary piston (20) to selectively open and close communication between the primary pot (42) and the primary conduit. Upon closing the valve (76), a primary circuit dead stroke is reduced by allowing initial pressurized fluid to develop and be presented to a primary circuit flow path for the primary conduit (32, 34, 36, 80) prior to the closure of a poppet valve (30) closing communication between the primary pot (42) and the reservoir.
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