Self-purging nozzle and valve apparatus

Claim 2

A nozzle for a container containing a pressurized fluid comprising: a body member having an entrance opening, an exit opening and an internal chamber communicating said entrance opening and said exit opening, said entrance opening being adapted to receive the exhaust stem of the container such that the stem is telescopically movable between a first position and a second position; closure means disposed within said chamber and movable between a closed position and an open position, said closure means sealingly engaging said body member to close said exit opening when in said closed position; resilient means normally biasing said closure means into said closed position; and camming means disposed within said chamber and operatively engaging said closure means and the exhaust stem to move said closure means from said closed position to said open position in response to movement of the stem from said first position to said second position.

Claim 3

A nozzle as recited in claim 1 wherein said closure means further includes a purging means for purging said entrance opening when said closure means is in said closed position.

Claim 4

A nozzle for a container containing a pressurized fluid comprising: a nozzle body member forming an elongated chamber having a first end portion and a second end portion, said body member having an entrance opening located between said first and second end portions and an exit opening in said first end portion, said entrance opening communicating the container with said chamber, closure means disposed within said chamber and movable between a closed position and an open position, said closure means having a first sealing means for closing said exit opening when said closure means is in said closed position and a second sealing means for sealingly engaging said body member between said entrance opening and said second end portion when in said closed position so that said chamber is pressurized, said closure means being shaped such that the fluid pressure in said chamber exerts a force on said closure means tending to move said closure means into said open position; resilient means biasing said closure means into said closed position when the pressure in said chamber is less than a predetermined pressure; and means for moving said closure means from said closed position into said open position for discharging pressurized fluid from said chamber through said exit opening.

Claim 5

A nozzle for a container containing a pressurized fluid comprising: a nozzle body member forming an elongated chamber having a first end portion and a second end portion, said body member having an entrance opening located between said first and second end portions and an exit opening in said first end portion, said entrance opening communicating the container with said chamber, closure means disposed within said chamber and movable between a closed position and an open position, said closure means having a first sealing means for closing said exit opening when said closure means is in said closed position and a second sealing means for sealingly engaging said body member between said entrance opening and said second end portion when in said closed position so that said chamber is pressurized, said closure means being shaped such that the fluid pressure in said chamber exerts a force on said closure means tending to move said closure means into said open position; resilient means biasing said closure means into said closed position when the pressure in said chamber is less than a predetermined pressure; and means for moving said closure means from said closed position into said open position for discharging pressurized fluid from said chamber through said exit opening.

Claim 6

A nozzle as recited in claim 3 wherein said closure means includes a purging means for purging said exit opening when said closure means is in said closed position.

Claim 7

A nozzle as recited in claim 3 wherein said body member further includes a stem portion terminating in a flanged portion which defines said entrance opening and provides a means for attachment of said body member to the container.

Claim 8

A nozzle as recited in claim 3 wherein said means for moving said closure means includes a lever means pivotally connected to said body member and said closure means.

Claim 9

A nozzle for a container containing a pressurized fluid comprising: an elongated body member forming a chamber having a first opening at one end and a second opening at the other end, said body member having a third opening for receiving said pressurized fluid from said container; an elongated closure member having a fourth opening at one end and a fifth opening at the other end for telescopically receiving said one end of said body member, said closure member being telescopically movable relative to said body member between an open position and a closed position, said closure member sealingly engaging said one end of said body member when in said closed position to close said first and fourth openings; and actuator means coupled to said closure member and said body member and forming a resilient closure for said second opening, said actuator means being biased into a first position by the pressurized fluid in said chamber acting against said resilient closure and being operative to move said closure member into said closed position, said actuator means being movable into a second position to move said closure member into said open position whereby said first opening communicates said chamber with said fourth opening to discharge said pressurized fluid therethrough.

Claim 10

A nozzle for a container containing a pressurized fluid comprising: an elongated body member forming a chamber having a first opening at one end and a second opening at the other end, said body member having a third opening for receiving said pressurized fluid from said container; an elongated closure member having a fourth opening at one end and a fifth opening at the other end for telescopically receiving said one end of said body member, said closure member being telescopically movable relative to said body member between an open position and a closed position, said closure member sealingly engaging said one end of said body member when in said closed position to close said first and fourth openings; and actuator means coupled to said closure member and said body member and forming a resilient closure for said second opening, said actuator means being biased into a first position by the pressurized fluid in said chamber acting against said resilient closure and being operative to move said closure member into said closed position, said actuator means being movable into a second position to move said closure member into said open position whereby said first opening communicates said chamber with said fourth opening to discharge said pressurized fluid therethrough.

Claim 11

A nozzle as recited in claim 7 wherein said body member includes a purging means for purging said fourth opening when said closure member is in said closed position.