US 11,864,960 B2
Valve for fluid ejector
Richard P. Bushman, Oakdale, MN (US)
Assigned to Crosstex International, Inc., Hauppauge, NY (US)
Appl. No. 16/321,594
Filed by Crosstex International, Inc., Hauppauge, NY (US)
PCT Filed Aug. 16, 2017, PCT No. PCT/US2017/047138
§ 371(c)(1), (2) Date Jan. 29, 2019,
PCT Pub. No. WO2018/035219, PCT Pub. Date Feb. 22, 2018.
Claims priority of provisional application 62/375,819, filed on Aug. 16, 2016.
Prior Publication US 2020/0397532 A1, Dec. 24, 2020
Int. Cl. A61C 1/00 (2006.01); A61C 17/12 (2006.01); F16K 15/18 (2006.01); A61M 39/22 (2006.01); A61M 39/24 (2006.01)
CPC A61C 1/0061 (2013.01) [A61C 17/13 (2019.05); F16K 15/1848 (2021.08); A61M 39/22 (2013.01); A61M 2039/229 (2013.01); A61M 2039/246 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A dental suction system, comprising:
an ejector tube; and
a valve body having an inlet configured for connection with the ejector tube, an outlet configured for direct connection with a vacuum hose, 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 rotatable relative to the valve body to selectively alter a flow of fluid along the fluid flow path, wherein the fluid flow path exhibits a varied cross-sectional area along a length of the fluid flow path, wherein the through-passage includes a first opening on a first side of the valve plug, and a second opening on a second side of the valve plug; and
a ramped surface positioned in the fluid flow path of the valve body located outside of the valve plug between a proximal end of the valve plug and the outlet of the valve body providing a transition to the outlet 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.