The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 08, 1989
Filed:
Jan. 13, 1988
Tetsuro Arikawa, Kanagawa, JP;
Nippon A B S, Ltd., , JP;
Abstract
An anti-skid control apparatus includes a master cylinder, a fluid pressure control valve for controlling fluid pressures of wheel cylinders connected to one of two brake conduit circuits, and a valve apparatus for controlling fluid pressure of wheel cylinders connected to the other of the two brake conduit circuits. The valve apparatus includes a casing having first and second input ports, an output port, a piston, a control chamber and a volume chamber formed at both sides of the piston. A valve part is disposed between the first input port and the volume chamber, the first input port being connected to one fluid pressure generating chamber of the master cylinder and the output port being connected to the wheel cylinders that are connected to the other of the two brake conduit circuits. A changeover valve is connected to the second input port. The changeover valve is set either in a first position for connecting another fluid pressure generating chamber of the master cylinder to the control chamber or else a second position for connecting the output side of the fluid pressure control valve with the control chamber. When the changeover valve is in the first position, the valve part is open, and when the changeover valve is in the second position and the fluid pressure control valve is operated, the piston is moved toward the control chamber to close the valve part so as to cut off the first input port from the volume chamber and change the volume of the volume chamber.