METERING VALVE

摘要

The present invention is directed to a metering valve used in both conventional and bag-on-valve aerosol container applications that allows a high flow rate of especially viscous substances. The metering valve according to the present invention including a valve housing, a valve stem, and a spring or other biasing device that allows the valve stem to move relative to the valve housing. The valve stem serves as a metering chamber with a metering device in the form of a ball or disk without other mechanisms such as springs or mechanical parts within the valve stem. Radial bores and a seal near the bottom of the valve stem provide for dispensing of pre-determined quantities of product from an aerosol container pressurized with liquefied propellants or compressed gas. The bore shape and size can be selected to facilitate a high volume flow rate for highly viscous substances.

主权项

1. A metering valve for use in a pressurized aerosol application, the valve comprising:
a valve housing having an outer surface for supportive engagement with a mounting cup for a product container and a first cavity defined within the valve housing for receiving valve components comprising; a valve stem springingly engaged with the valve housing, the valve stem defining a central passage for dispensing pressurized product to the environment, and comprising a metering device, an upper and lower sealing rim, and a lower end portion including a sealing ring for engaging a sealing edge of the valve housing; and at least one radial bore formed in a sidewall of the valve stem located in the lower end portion of the valve stem below the lower sealing rim, the at least one radial bore leading to the central passage extending from the radial bore to a dispensing orifice positioned above the upper sealing rim at an upper end portion of the valve stem; and wherein the metering device is longitudinally movable within the valve stem from a rest position sealing the valve stem from the container at the lower sealing rim and an actuated position dispensing a pre-determined quantity of product from the valve stem and then sealing the dispensing orifice at the upper sealing rim of the valve stem.