Patent ID: 11864960
Assignee: CROSSTEX INTERNATIONAL, INC.
Field: Medical technology (Instruments)
Classification: CPC A  F | IPC A  F

Claim 9:
10. A valve assembly for a dental suction system, comprising:
an ejector tube;
a valve body having an inlet configured for connection with the ejector tube, an outlet configured for direct connection with a vacuum hose of the dental suction system, and a fluid flow path extending between the inlet and the outlet;
a valve plug positioned at least partially within the valve body, the valve plug including a through-passage, the valve plug being displaceable relative to the valve body to selectively alter a flow of fluid along the fluid flow path; and
a backflow prevention device disposed in the fluid flow path between the valve plug and the inlet of the valve body or between the valve plug and the outlet of the valve body, the backflow prevention device being movable between open and closed positions to control fluid flow through the fluid flow path independent of operation of the valve plug; and
a ramped surface positioned in the fluid flow path, wherein the ramped surface is not located in the through-passage of the valve body; wherein an outlet opening of the outlet has a larger cross-sectional area than a cross-sectional area of the through-passage in the valve plug.