Iwaki Co., Ltd.

Tsutomu Sawada

Toshiki Oniduka

Tsuyoshi Watanabe

Masao Morishita

A spool valve arrangement with a cylinder is fitted with a clearance fit in a cylinder bore in a housing of the spool valve arrangement. The housing has first pressure medium ports and the cylinder has second pressure medium ports. A socket is inserted through each first pressure medium port in the housing and each second pressure medium port in the cylinder. The socket has a small diameter part, which is fitted with a clearance fit in the second pressure medium port, and a large diameter part, which is engaged with a shoulder formed in the first pressure medium port. By screwing a conduit end in the first pressure medium port, the socket is held in the mounted position, thus providing a seal of the region of this port and also providing an anti-rotation effect on the cylinder relative to the housing.

Spool valve arrangement

There is provided a pump system excellent in a maintenance ability and compatibility. The pump system comprises a pump () for transferring a liquid by alternately supplying air to air chambers () to extend and contract a pair of bellows () linked to a shaft (). It also comprises a switching valve mechanism () for switching the air supplied to the pump (). Switching mechanisms () are employed to switch the pilot air for controlling the switching operation of the switching valve mechanism (). The switching mechanisms are detachably attached to cases () of the pump () from outside.

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Saitama-ken, Japan

Tsutomu Sawada