Smc Corporation

Tetsuro Tokuda

Hiroaki Suzuki

Toyonobu Sakurai

Makoto Tomita

An input port and an output port opening in orientations at 90&deg; from each other are connected by a flow path , a valve seat formed around an input-side connecting hole can be opened and closed from inside the flow path by a valve body provided to a tip end of a valve shaft for moving forward and rearward by operation of fluid pressure, the valve body moves across a front of an output-side connecting hole in opening and closing of the valve seat , a diameter of the valve shaft is formed to be equal to or slightly larger than that of the valve body , and a stroke of the valve body for opening and closing the valve seat is set at an amount required to fully open the output-side connecting hole

Two-port valve

A three-port fluid selector valve is formed to have a large flow coefficient while making a structure of the valve compact. This three-port fluid selector valve allows fluid which has flowed from an inlet port into a valve chamber in a valve casing to flow out of two outlet ports and Valve seats and communicating with the respective outlet ports are provided to opposite walls of the valve chamber facing each other and a poppet-type valve body for being selectively seated on the valve seats to connect the inlet port to one of the outlet ports and to close the other of the outlet ports is disposed in the valve chamber. The valve seats are formed in recessed shapes in the valve chamber and provided to inner bottom portions of valve seat holes and having depths in which at least a half of a thickness of the valve body at a periphery of the valve body is embedded and suppresses reduction of the flow coefficient.

Fluid selector valve

There is provided a two-port valve in which a deviation of a degree of parallelization of a valve member and a valve seat can be corrected automatically, which has excellent airtightness, and in which assembly and replacement of the valve member are easy. For this purpose, a shoulder portion and a small-diameter portion are formed in a vicinity of an end portion of a shaft , a groove portion into which a snap ring is mounted is formed in a vicinity of a tip end portion of the small-diameter portion, a through hole into which the small-diameter portion is inserted and an annular stepped portion formed by increasing a diameter of a portion of the through hole are provided to the valve member , a sealant for providing sealing between the shaft and the valve member is mounted to the stepped portion, a plate is provided between the valve member and the snap ring , and the valve member is locked while pressing the sealant mounted to the stepped portion and while being pushed against the shoulder portion by the snap ring mounted into the groove portion and the plate

Growing community of inventors

Tsukuba-gun, Japan

Tetsuro Tokuda