Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Reexamination Certificate
2007-10-18
2011-11-08
Williams, Melanie Torres (Department: 3657)
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
C303S013000, C303SDIG011
Reexamination Certificate
active
08052227
ABSTRACT:
A brake apparatus for a vehicle has a master cylinder (11) having a front pressure chamber (R1) and a rear pressure chamber (R2) defined by a drive piston (13) in a cylinder (12). The brake apparatus also has a pressure control valve (44) which can output a control pressure obtained by adjusting a hydraulic pressure from an accumulator (42) to the rear pressure chamber (R2) and wheel cylinders (21RR and21RL) by coupling wheel cylinders (21FR and21FL) to the front pressure chamber (R1) and moving a drive valve (56) by an electromagnetic force based on a target control pressure, and which can output a control pressure obtained by adjusting a hydraulic pressure from the accumulator (42) by moving the drive valve (56) by an external piston (58) that is moved by an external pressure from the front pressure chamber (R1), to the rear pressure chamber (R2) and wheel cylinders (21RR and21RL).
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Office Action issued Jun. 22, 2011 in Chinese Patent Application No. 200780021719.1 (with English translation).
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
Torres Williams Melanie
Toyota Jidosha & Kabushiki Kaisha
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