Reciprocating valve assembly for pressurized containers

Claim 2

A valve assembly for a pressurized container comprising an elongated valve body adapted to have one end fixedly mounted on a container and the other end having an exit orifice, said valve body forming a chamber adjacent said exit orifice, a piston mounted for sliding movement in said valve body and having a longitudinally extending bore therein with one end adapted for fluid flow communication with the interior of the container and the other end having radially extended ports in fluid flow communication with said chamber, said piston having an outermost nose portion, said piston being slidable from an extended position at which said nose portion seals said exit orifice to a retracted position at which said nose portion is away from said exit orifice permitting contents of said container to exit through said orifice after passage through said bore, said radially extending ports and said chamber, sealing means for sealing said piston with respect to said valve body to form an inner wall of said chamber, second sealing means adapted for sealing said piston with respect to said container, said piston being of stepped configuration to utilize internal pressure from the container for sealing said exit orifice.

Claim 3

A valve assembly for a pressurized container comprising an elongated valve body adapted to have one end fixedly mounted on a container and the other end having an exit orifice, said valve body forming a chamber adjacent said exit orifice, a piston mounted for sliding movement in said valve body and having a longitudinally extending bore therein with one end adapted for fluid flow communication with said chamber, said piston having a nose portion for sealing said exit orifice, sealing means for sealing said piston with respect to said valve body to form an inner wall of said chamber, second sealing means adapted for sealing said piston with respect to said container, said piston being of stepped configuration to utilize internal pressure from the container for sealing said exit orifice, and an actuator mounted externally of the valve body having a portion extending through an opening in said valve body for moving the piston to its valve open position.

Claim 4

A valve assembly for a pressurized container comprising an elongated valve body adapted to have one end fixedly mounted on a container and the other end having an exit orifice, said valve body forming a chamber adjacent said exit orifice, a piston mounted for sliding movement in said valve body and having a longitudinally extending bore therein with one end adapted for fluid flow communication with said chamber, said piston having a nose portion for sealing said exit orifice, sealing means for sealing said piston with respect to said valve body to form an inner wall of said chamber, second sealing means adapted for sealing said piston with respect to said container, said piston being of stepped configuration to utilize internal pressure from the container for sealing said exit orifice, and an actuator mounted externally of the valve body having a portion extending through an opening in said valve body for moving the piston to its valve open position.

Claim 5

A valve assembly for a pressurized container comprising an elongated valve body adapted to have one end connected to the upper end of a container and the other end having an exit orifice, said valve body forming a chamber adjacent said exit orifice, a piston mounted for sliding movement in the valve body, said piston having a longitudinally extending bore therein with one end adapted for fluid flow communication with the interior of the container and the other end having radially extending ports in fluid flow communication with said chamber, said piston having a nose portion for sealing said exit orifice, said piston having means for providing a sliding seal with the valve body to form the inner wall of said chamber, said piston having sealing means adapted for providing a sliding seal with said container, said piston having a first effective area adapted for being subjected to internal pressure from the container to urge said piston towards its closed position and said piston having a second effective area adapted for being subjected to back pressure to urge said piston towards its open position, said first effective area being greater than said second effective area, an actuator mounted externally of the valve body having a portion extending through an opening in said valve body for moving the Piston to its valve open position.

Claim 6

A valve assembly for a pressurized container comprising an elongated valve body adapted to have one end connected to the upper end of a container and the other end having an exit orifice, said valve body forming a chamber adjacent said exit orifice, a piston mounted for sliding movement in the valve body, said piston having a longitudinally extending bore therein with one end adapted for fluid flow communication with the interior of the container and the other end having radially extending ports in fluid flow communication with said chamber, said piston having a nose portion for sealing said exit orifice, said piston having means for providing a sliding seal with the valve body to form the inner wall of said chamber, said piston having sealing means adapted for providing a sliding seal with said container, said piston having a first effective area adapted for being subjected to internal pressure from the container to urge said piston towards its closed position and said piston having a second effective area adapted for being subjected to back pressure to urge said piston towards its open position, said first effective area being greater than said second effective area, an actuator mounted externally of the valve body having a portion extending through an opening in said valve body for moving the Piston to its valve open position.

Claim 7

A valve assembly for a pressurized container according to claim 3 wherein said actuator has an internal threaded portion, and said piston has an inner portion and a medial portion, a longitudinally extending rib portion interposed between said inner portion and said medial portion carrying a threaded portion which mates with said threaded portion of the actuator, said valve body having vertically extending slots to accommodate said ribs.

Claim 8

A valve assembly for a pressurized container according to claim 3 wherein said exit orifice has a diametrically inwardly tapered wall in the direction of discharge, and wherein said nose portion has a mating tapered wall for sealing said exit orifice when the valve is in its closed position.

Claim 9

A valve assembly for a pressurized container comprising an elongated valve body adapted to have one end fixedly mounted on a container and the other end having an exit orifice, said valve body forming a chamber adjacent said exit orifice, a piston mounted for sliding movement in said valve body, and having a longitudinally extending bore therein with one end adapted for fluid flow communication with the interior of the container and the other end having radially extending ports in fluid flow communication with said chamber, said piston having a nose portion for sealing said exit orifice, first sealing means for sealing said piston with respect to said container, second sealing means adapted for sealing said piston with respect to said valve body to form an inner wall of said chamber, said piston having a first diameter adjacent said first sealing means and a second diameter adjacent said second sealing means, said first diameter being greater than said second diameter, whereby the internal pressure from the container is adapted to urge said piston to seal the exit orifice, an actuator mounted externally of said valve body having a portion extending through an opening in said valve body for moving the piston to valve open position.

Claim 10

A valve assembly for a pressurized container comprising an elongated valve body adapted to have one end fixedly mounted on a container and the other end having an exit orifice, said valve body forming a chamber adjacent said exit orifice, a piston mounted for sliding movement in said valve body, and having a longitudinally extending bore therein with one end adapted for fluid flow communication with the interior of the container and the other end having radially extending ports in fluid flow communication with said chamber, said piston having a nose portion for sealing said exit orifice, first sealing means for sealing said piston with respect to said container, second sealing means adapted for sealing said piston with respect to said valve body to form an inner wall of said chamber, said piston having a first diameter adjacent said first sealing means and a second diameter adjacent said second sealing means, said first diameter being greater than said second diameter, whereby the internal pressure from the container is adapted to urge said piston to seal the exit orifice, an actuator mounted externally of said valve body having a portion extending through an opening in said valve body for moving the piston to valve open position.

Claim 11

A pressurized package comprising a container, a valve cup carried at the upper end of said container, an elongated valve body, an internal seal member, said valve cup having a curl portion and a crimp portion interposed between said internal seal member and said valve body to seal said seal member with respect to said valve cup and said valve cup with respect to said valve body, the other end of said valve body having an exit orifice, said valve body forming a chamber adjacent said exit orifice, a piston mounted for sliding movement in said valve body, and having a longitudinally extending bore therein with one end in fluid flow communication with the interior of the container and the other end having radially extending ports in fluid flow communication with said chamber, said piston having a nose portion for sealing said exit orifice, said piston having a tapered projection for engaging and forming a sliding seal with said valve body to form an inner wall of said chamber, said internal seal member having a tapered projection for engaging and forming a sliding seal with said piston, said piston having a first diameter at its tapered projection and a second diameter adjacent the tapered projection of said internal seal member, said second diameter being greater than said first diameter whereby the internal pressure from the container urges said piston to seal the exit orifice, an actuator having an internal threaded portion, said piston having an inner portion and a medial portion, a longitudinally extending rib portion interposed between said inner portion and said medial portion carrying a threaded portion which mates with said threaded portion of the actuator, the upper portion of said valve body having vertically extending slots to accomodate said ribs.

Claim 12

A pressurized package comprising a container, a valve cup carried at the upper end of said container, an elongated valve body, an internal seal member, said valve cup having a curl portion and a crimp portion interposed between said internal seal member and said valve body to seal said seal member with respect to said valve cup and said valve cup with respect to said valve body, the other end of said valve body having an exit orifice, said valve body forming a chamber adjacent said exit orifice, a piston mounted for sliding movement in said valve body, and having a longitudinally extending bore therein with one end in fluid flow communication with the interior of the container and the other end having radially extending ports in fluid flow communication with said chamber, said piston having a nose portion for sealing said exit orifice, said piston having a tapered projection for engaging and forming a sliding seal with said valve body to form an inner wall of said chamber, said internal seal member having a tapered projection for engaging and forming a sliding seal with said piston, said piston having a first diameter at its tapered projection and a second diameter adjacent the tapered projection of said internal seal member, said second diameter being greater than said first diameter whereby the internal pressure from the container urges said piston to seal the exit orifice, an actuator having an internal threaded portion, said piston having an inner portion and a medial portion, a longitudinally extending rib portion interposed between said inner portion and said medial portion carrying a threaded portion which mates with said threaded portion of the actuator, the upper portion of said valve body having vertically extending slots to accomodate said ribs.

Claim 13

A pressurized package comprising a container and a valve assembly mounted on said container, said valve assembly comprising an elongated valve body having one end connected to the upper end of the container and The other end having an exit orifice, said valve body forming a chamber adjacent said exit orifice, a piston mounted for sliding movement in the valve body, said piston having a longitudinally extending bore therein with one end in fluid flow communication with the interior of the container and the other end having radially extending ports in fluid flow communication with said chamber, said piston having a nose portion for sealing said exit orifice, said piston having means for providing a sliding seal with the valve body to form the inner wall of said chamber, said piston having sealing means for providing a sliding seal with said container, said piston having a first effective area subjected to internal pressure from the container to urge said piston towards its closed position and said piston having a second effective area subjected to back pressure to urge said piston towards its open position, said first effective area being greater than said second effective area.

Claim 14

A pressurized package comprising a container and a valve assembly mounted on said container, said valve assembly comprising an elongated valve body having one end connected to the upper end of the container and The other end having an exit orifice, said valve body forming a chamber adjacent said exit orifice, a piston mounted for sliding movement in the valve body, said piston having a longitudinally extending bore therein with one end in fluid flow communication with the interior of the container and the other end having radially extending ports in fluid flow communication with said chamber, said piston having a nose portion for sealing said exit orifice, said piston having means for providing a sliding seal with the valve body to form the inner wall of said chamber, said piston having sealing means for providing a sliding seal with said container, said piston having a first effective area subjected to internal pressure from the container to urge said piston towards its closed position and said piston having a second effective area subjected to back pressure to urge said piston towards its open position, said first effective area being greater than said second effective area.

Claim 15

A pressurized package comprising a container and a valve assembly mounted on said container, said valve assembly comprising an elongated valve body having one end fixedly mounted on a container and the other end having an exit orifice, said valve body forming a chamber adjacent said exit orifice, a piston mounted for sliding movement in said valve body, and having a longitudinally extending bore therein with one end in fluid flow communication with the interior of the container and the other end having radially extending ports in fluid flow communication with said chamber, said piston having a nose portion for sealing said exit orifice, first sealing means for sealing said piston with respect to said container, second sealing means for sealing said piston with respect to said valve body to form an inner wall of said chamber, said piston having a first diameter adjacent said first sealing means and a second diameter adjacent said second sealing means, said first diameter being greater than said first diameter, whereby the internal pressure from the container urges said piston to seal the exit orifice, an actuator mounted externally of said valve body having a portion extending through an opening in said valve body for moving the piston to valve open position.

Claim 16

A pressurized package comprising a container and a valve assembly mounted on said container, said valve assembly comprising an elongated valve body having one end fixedly mounted on a container and the other end having an exit orifice, said valve body forming a chamber adjacent said exit orifice, a piston mounted for sliding movement in said valve body, and having a longitudinally extending bore therein with one end in fluid flow communication with the interior of the container and the other end having radially extending ports in fluid flow communication with said chamber, said piston having a nose portion for sealing said exit orifice, first sealing means for sealing said piston with respect to said container, second sealing means for sealing said piston with respect to said valve body to form an inner wall of said chamber, said piston having a first diameter adjacent said first sealing means and a second diameter adjacent said second sealing means, said first diameter being greater than said first diameter, whereby the internal pressure from the container urges said piston to seal the exit orifice, an actuator mounted externally of said valve body having a portion extending through an opening in said valve body for moving the piston to valve open position.

Claim 17

A pressurized package according to claim 9, wherein said exit orifice has a diametrically inwardly tapered wall in the direction of discharge, and wherein said nose portion has a mating tapered wall for sealing said exit orifice when the valve assembly is in its closed position.