Patent ID: 9599242
Date: 2017-03-21
CPC Classifications: F16K

Claim:
1. An anti-siphon one-way valve, comprising a valve seat, a valve core, a return spring, and a Y-shaped ring; the valve seat having an inlet and an outlet, the valve seat having a valve cavity therein, the valve cavity communicating with the inlet and the outlet respectively; the valve core being slidably mounted in the valve cavity, the Y-shaped ring being installed on the valve core and leaning against a side wall of the valve cavity, the Y-shaped ring having a Y-shaped cross-section, the return spring being fitted on the valve core; wherein the Y-shaped ring comprises an installation base, an installation side wing and an elastic side wing respectively formed at two sides of the installation base, the elastic side wing is against the side wall of the valve cavity, with the inlet of the valve cavity as a reference direction, the elastic side wing and the side wall of the valve cavity form an included angle which is an acute angle; and wherein the valve core comprises a valve rod and a valve body, the valve body comprises a circumferential installation groove formed on an outer circumferential surface of the valve body to receive the Y-shaped ring mounted therein, wherein the installation groove has first and second side walls that are opposite to each other to define a space and the first side wall is longer than the second side wall such that the Y-shaped ring is received in the space between the first and second side walls with the installation base seated on the first side wall and the elastic side wing projecting outside the space for engagement with the side wall of the valve cavity.