Valve for aerosol container

摘要

A valve for an aerosol container has a valve plate adapted to close an axial end of the container, a valve subassembly having at least one dispensing element, a seal ring, and a compression spring, and a valve holder containing the valve subassembly and having an axially open assembly hole through which the valve subassembly can pass. A cover closes the assembly hole and is formed with an axially throughgoing cover hole through which the dispensing element projects and with which the dispensing element forms an annular and axially extending passage. A seal ring surrounds the dispensing element and is engaged between the holder and the cover. A spring biases the dispensing element axially outward against the seal ring and presses an axial outer face of the seal ring against the axially inner face of the cover. Passages extend axially between an interior of the container and the seal ring.

主权项

1. A valve for an aerosol container comprising:
a valve plate adapted to close an axial end of the container; a valve subassembly having at least one dispensing element, a seal ring, and a compression spring; a valve holder containing the valve subassembly and having an axially open assembly hole through which the valve subassembly can pass; a cover closing the assembly hole and formed with an axially throughgoing cover hole through which the dispensing element projects and with which the dispensing element forms an annular and axially extending passage opening axially inward at an axial inner face of the cover and outward at a gap between the dispensing element and the cover; a seal ring surrounding the dispensing element and engaged between an axially outer face of the holder and the axially inner face of the cover; a spring biasing the dispensing element axially outward against the seal ring and pressing an axial outer face of the seal ring against the axially inner face of the cover; and channels on the holder extending axially between an interior of the container and the seal ring, whereby, when gas pressure at the gap exceeds gas pressure inside the container, gas flows axially inward through the gap and through the passage and channels to the interior of the container.