Dual flow check valve for positive crankcase ventilation system

摘要

A dual flow check valve includes a valve body having an inner valve cavity, a first valve opening, and a second valve opening. The dual flow check valve further includes a seal disposed within the valve body. The seal is operatively coupled within the valve body such that the seal is configured to move relative to the valve body between an open position, in which the seal allows the gas to flow between the first and second valve openings through the inner valve cavity, and a closed position, in which the seal inhibits the gas and the liquid from flowing through the inner valve cavity from the first valve opening to the second valve opening.

主权项

1. A dual flow check valve comprising:
a valve body having an inner valve cavity, a first valve opening leading to the inner valve cavity, and a second valve opening leading to the inner valve cavity, wherein the inner valve cavity fluidly couples the first valve opening with the second valve opening; a seal disposed within the valve body, the seal configured to be buoyant in a liquid, the seal being configured to remain stationary in relation to the valve body when a gas flows between the first valve opening and the second valve opening through the inner valve cavity, and the seal having a maximum seal cross-sectional dimension; wherein the seal is operatively coupled within the valve body such that the seal is configured to move relative to the valve body between an open position, in which the seal allows the gas to flow between the first and second valve openings through the inner valve cavity, and a closed position, in which the seal inhibits the gas and the liquid from flowing through the inner valve cavity from the first valve opening to the second valve opening; and a base fixed within the valve body, wherein the base is configured to support the seal when the seal is in the open position, the base has at least one hole extending therethrough, the at least one hole is configured to allow the gas to flow between the first and second valve openings through the inner valve cavity, the base includes a base body, the base body has a maximum body cross-sectional dimension, the maximum seal cross-sectional dimension is less than the maximum body cross-sectional dimension, the at least one hole extends through a portion of the base that is outside the maximum body cross-sectional dimension such that the seal does not extend over the at least one hole when the seal is in the open position and sits on the base.