Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
165 words
An apparatus for controlling a hydraulic braking pressure for a vehicle, comprising: a housing having a plurality of input ports leading to each other, a plurality of input ports leading to each to a plurality of braking units, a release port leading to an oil tank, and a plurality of cylinder bores formed parallel to each other; a plurality of hydraulic pressure supply sources separately connected to said input ports via check valves; a plurality of spools each slidably fitted in each of the cylinder bores for changing over a communication state among the output ports, the input ports and the release port; a plurality of actuators each connected to one of opposite ends of each of the spools to generate a thrust force in dependence on an amount of electricity input thereto; and a plurality of hydraulic pressure chambers leading to said output ports and exposed to other ends of the spools so as to generate a hydraulic pressure acting against said thrust force.
Claim 2
Independent Claim
165 words
An apparatus for controlling a hydraulic braking pressure for a vehicle, comprising: a housing having a plurality of input ports leading to each other, a plurality of input ports leading to each to a plurality of braking units, a release port leading to an oil tank, and a plurality of cylinder bores formed parallel to each other; a plurality of hydraulic pressure supply sources separately connected to said input ports via check valves; a plurality of spools each slidably fitted in each of the cylinder bores for changing over a communication state among the output ports, the input ports and the release port; a plurality of actuators each connected to one of opposite ends of each of the spools to generate a thrust force in dependence on an amount of electricity input thereto; and a plurality of hydraulic pressure chambers leading to said output ports and exposed to other ends of the spools so as to generate a hydraulic pressure acting against said thrust force.
Claim 3
Dependent Claim
160 words
An apparatus for controlling a hydraulic braking pressure for a vehicle as claimed in claim 1, further comprising first valves and second valves which are formed by cooperation of said spools and said housing, said first valves being operable to change over connection and disconnection between the input ports and the output ports, said second valves being operable to change over connection and disconnection between the output ports and the release port, wherein the first valves are closed and the second valves are opened at a hydraulic pressure releasing position of the spools located adjacent to the actuators, wherein the first valves are opened and the second valves are closed at a hydraulic pressure supplying position of the spools which is closer to the hydraulic pressure chambers than said hydraulic pressure releasing position, and wherein the first and second valves are closed when the spools are located intermediate between the hydraulic pressure releasing position and the hydraulic pressure supplying position.
Claim 4
Dependent Claim
38 words
An apparatus for controlling a hydraulic braking pressure for a vehicle as claimed in claim 1 or 2, wherein said housing, spools and said actuators are provided at least in two sets separately for front and rear wheels.
Claim 5
Dependent Claim
39 words
An apparatus for controlling a hydraulic braking pressure for a vehicle as claimed in claim 1 or 2, wherein said housing, spools and said actuators are provided in a plurality of sets separately for said plurality of braking units.
Claim 6
Dependent Claim
69 words
An apparatus for controlling a hydraulic braking pressure for a vehicle as claimed in claim 4, further comprising third valves formed by cooperation of the spools and the housing, said third valves being operable to change over connection and disconnection between the hydraulic pressure chambers and the braking units, wherein the third valves are closed when the spools are displaced to a maximum degree toward the hydraulic pressure chambers.
Claim 7
Dependent Claim
27 words
An apparatus for controlling a hydraulic braking pressure for a vehicle as claimed in claim 1 or 2, wherein said check valves are provided in said housing.