Oblon, Fisher, Spivak, McClelland & Maier
Regulator valve for hydraulic anti-skid apparatus
 A regulator valve for a hydraulic anti-skid apparatus and which includes a housing provided with a first inlet port for connection to a fluid pump and the anti-skid apparatus, a second inlet port for connection to a master cylinder, and an outlet port for connection to a fluid reservoir, a regulator piston reciprocably disposed within the housing to form a first fluid chamber in open communication with the first inlet and outlet ports and a second fluid chamber in open communication with the second inlet port, and a spring loaded annular valve seat member arranged within the first fluid chamber to cooperate with a valve part of the piston so as to control the fluid flow from the first inlet port to the outlet port in response to the difference in pressure between the fluid chambers. A support member is arranged within the first fluid chamber formed therein with an axial bore in which a large diameter portion of the piston is slidably disposed to form a third annular fluid chamber. The support member is further formed with an orifice for effecting the fluid flow between the first and third fluid chambers in response to axial movement of the piston. 
Aisin Seiki Kabushiki Kaisha Toyota Jidosha Kabushiki Kaisha
B B B B
B60T B60T B60T B60T
inventional inventional inventional inventional
Asao Fumio Hiroyuki Nobuyasu Yoshiharu Shingo
Kozakai Nakagawa Oka Nakanishi Adachi Watanabe