Control valve device for a dental device

摘要

The present invention is directed to a control valve device or arrangement for the simultaneous control of a plurality of fluid agents in a dental device. The control valve device arrangement comprises a valve member and a housing member composed of at least one part. Preferably, the housing member and the valve member are plate-like members which are arranged in a sandwich-like fashion with the valve member interposed between the two plates of the housing member and an arrangement is provided for shifting the valve member relative to the plates of the housing member. Each of the plates forming the valve member and the housing member are composed at least along the sliding surfaces of a ceramic material which is super-fine or smooth to form a sealing relationship therebetween. In the preferred embodiment, each of the three plate-like members are composed of the ceramic material and the valve member has through-passages which are arranged in the pattern which is the same as the pattern of ports provided in each of the plate members so that as the valve member can be shifted from a position with the through-passages out of alignment with the ports to block the flow of the agent to another position with the opening of the bores aligned with the pattern of openings or ports to permit flow of all of the agents simultaneously.