Combined pressure filling and dispensing control valve for aerosol containers

Claim 2

In a combined pressure filling and dispensing valve for an aerosol container having a filling mouth, said valve including a molded plastic tubular housing having open inlet and outlet ends, a mounting cup engaging said housing at its outlet end to support it in the mouth of a container and to close the container, said cup having an opening aligned with the axis of said housing, a tubular valve core telescopingly received in said housing and having a neck portion projecting through said mounting cup opening in radially spaced relation to the margin thereof, sealing means about said neck portion to close the outlet end of said valve housing, said valve core normally blocking release of aerosol product from said housing but axially depressable relative thereto to permit release of aerosol product through said core; the improvement which comprises: a. an integrally formed tubular tailpiece at the inlet end of said valve housinG providing a conduit for communicating the interior of the housing with the interior of a container, b. a length of resilient plastic dip tubing disposed over said tailpiece, c. a sleeve also formed integrally on said housing coaxially of and at least partially coextensive with said tailpiece in radially spaced relation thereto to form an annular well in which said dip tubing is received, d. a peripheral lip formed internally in said sleeve, said lip making resilient engagement circumferentially of the surface of said dip tubing within the axially coextensive limits of said sleeve and tailpiece, and e. fluid passage means communicating said annular well internally of said lip with the interior of said valve housing.

Claim 3

A combined pressure filling and dispensing control valve as defined in claim 1, wherein the wall of said sleeve is radially resilient in the region of said lip.

Claim 4

A combined pressure filling and dispensing control valve as defined in claim 2, wherein the wall of said sleeve in the region of said lip is tapered to reduce its thickness.

Claim 5

A combined pressure filling and dispensing control valve as defined in claim 1, wherein a peripheral bead is formed on the inner wall of said sleeve adjacent its free terminus to provide said lip.

Claim 6

A combined pressure filling and dispensing control valve as defined in claim 1, wherein said length of dip tubing disposed over said tailpiece is substantially coextensive with said tailpiece and said tailpiece is formed with an internal socket for reception therein of an additional length of dip tubing.

Claim 7

A combined pressure filling and dispensing control valve for an aerosol container having a filling mouth comprising, a rigid mounting cup for closing said container mouth and for supporting said valve assembly on said container, said mounting cup having a central opening, a tubular valve housing of molded plastic open at its opposite ends with the outer end secured in said cup coaxially with the opening thereof, a tubular valve core telescoped within said valve housing and having a radially enlarged annular shoulder and an integrally joined neck of reduced diameter projecting axially outwardly through the opening in said cup in marginally spaced relation to said opening, annular resilient gasket means gripped on its outer periphery between said mounting cup and valve housing, said gasket means having a body portion free for axial flexure and a central aperture, the margin of which embraces said neck of the valve core to provide a sliding seal therewith, a spring compressed axially between said valve housing and valve core to urge the latter outwardly of the housing and compress the body portion of said gasket means between said shoulder and mounting cup, said tubular valve core being closed at its inner end and having a port extending through the wall of said valve core neck adjacent said shoulder, said port being normally closed by said gasket means but movable into communication with the interior of said valve housing by axial depression of said valve core against said spring, and conduit means at the inlet end of said valve housing for communicating the interior of said housing with the interior of the aerosol container, said conduit means including a tubular tailpiece integrally formed on said housing and a length of resilient plastic dip tubing received over said tailpiece, a sleeve on said valve house integrally joined at one end to said housing coaxially of and at least partially coextensive with said tailpiece and being radially spaced from said tailpiece to provide an annular well within which said dip tubing is received, said sleeve having on its interior surface a peripheral lip which makes contact circumferentially of the surface of said plastic dip tubing to form a seal thereabout within the axially coextensive limits of said sleeve and tailpiece, said contact being effective to prevent by-passing of fluid at normal operating pressures of thE aerosol dispenser but sufficiently resilient to permit radial distortion at fluid pressures significantly greater than normal dispensing pressure to break said seal and allow fluid to pass between said lip and dip tubing, passage means formed in said valve housing communicating said annular well internally of said lip with the interior of said valve housing; said gasket means at said housing outlet end comprising at least two superimposed resilient grommets, each being axially pierced in its annular body portion at circumferentially spaced points, said grommets being rotatively positioned in said valve housing such that the piercing in each of them is angularly offset from that of adjacent grommets.

Claim 8

A combined pressure filling and dispensing control valve for an aerosol container having a filling mouth comprising, a rigid mounting cup for closing said container mouth and for supporting said valve assembly on said container, said mounting cup having a central opening, a tubular valve housing of molded plastic open at its opposite ends with the outer end secured in said cup coaxially with the opening thereof, a tubular valve core telescoped within said valve housing and having a radially enlarged annular shoulder and an integrally joined neck of reduced diameter projecting axially outwardly through the opening in said cup in marginally spaced relation to said opening, annular resilient gasket means gripped on its outer periphery between said mounting cup and valve housing, said gasket means having a body portion free for axial flexure and a central aperture, the margin of which embraces said neck of the valve core to provide a sliding seal therewith, a spring compressed axially between said valve housing and valve core to urge the latter outwardly of the housing and compress the body portion of said gasket means between said shoulder and mounting cup, said tubular valve core being closed at its inner end and having a port extending through the wall of said valve core neck adjacent said shoulder, said port being normally closed by said gasket means but movable into communication with the interior of said valve housing by axial depression of said valve core against said spring, and conduit means at the inlet end of said valve housing for communicating the interior of said housing with the interior of the aerosol container, said conduit means including a tubular tailpiece integrally formed on said housing and a length of resilient plastic dip tubing received over said tailpiece, a sleeve on said valve house integrally joined at one end to said housing coaxially of and at least partially coextensive with said tailpiece and being radially spaced from said tailpiece to provide an annular well within which said dip tubing is received, said sleeve having on its interior surface a peripheral lip which makes contact circumferentially of the surface of said plastic dip tubing to form a seal thereabout within the axially coextensive limits of said sleeve and tailpiece, said contact being effective to prevent by-passing of fluid at normal operating pressures of thE aerosol dispenser but sufficiently resilient to permit radial distortion at fluid pressures significantly greater than normal dispensing pressure to break said seal and allow fluid to pass between said lip and dip tubing, passage means formed in said valve housing communicating said annular well internally of said lip with the interior of said valve housing; said gasket means at said housing outlet end comprising at least two superimposed resilient grommets, each being axially pierced in its annular body portion at circumferentially spaced points, said grommets being rotatively positioned in said valve housing such that the piercing in each of them is angularly offset from that of adjacent grommets.

Claim 9

A combined pressure filling and dispensing control valve as defined in claim 6, wherein said grommets are pierced to provide circumferentially spaced holes.

Claim 10

A combined pressure filling and dispensing control valve as defined in claim 6, wherein said grommets are pierced to provide circumferentially spaced slits.

Claim 11

A combined pressure filling and dispensing control valve as defined in claim 6, wherein one grommet is pierced to provide holes and the other to provide slits.