Non-refilling aerosol valve

A valve assembly comprising:

• a valve housing having an upper chamber, a lower chamber and a top adjacent the upper chamber;
• a housing tailpiece having a seat with a passageway therethrough that is disposed in the lower chamber,
• a sealing member disposed on the top of the valve housing;
• a valve stem disposed in the valve housing and through the sealing member, the valve stem having an outer wall, an opening and a passage disposed in an upper portion of the valve stem, the passage being in communication with an orifice that is through the outer wall, the orifice being in fluid communication with the lower chamber,
• wherein the valve stem is moveable in the valve housing between a closed position in which the sealing member seals the orifice and an open position in which the orifice is displaced away from the sealing member;
• and
• a resilient member disposed in the lower chamber on the seat,
• wherein the resilient member is compressed against the seat to create a seal and prevent filling in the open position when a pressure in the upper chamber is greater than a pressure in the tailpiece, and
• wherein the resilient member is deflected away from the seat to open the passageway when a pressure in the tailpiece is less than a pressure in the upper chamber to allow dispensing of a product.

A method of assembling a non-refillable valve;

• the method comprising
• providing a valve stem that has passage that extends along a vertical axis between a top and a bottom of the valve stem, an orifice disposed normal to the vertical axis through a wall of the valve stem, and a bottom surface at the bottom of the valve stem;
• providing a resilient member that has, in order from a proximal end to a distal end, a tailpiece, a flange, a middle portion, and a head,
• wherein the flange has a sealing interface disposed a surface of the flange;
• wherein the head has a member with a cylindrical outer surface and conical internal surface with a diameter that decreases from top to bottom;
• inserting the tailpiece through the passage from the top to the bottom of the valve stem;
• pulling the tailpiece down and through the passage until the flange is pulled through the bottom and the valve stem so that the sealing interface abuts the bottom surface and the cylindrical outer surface covers the orifice;
• and
• trimming the tailpiece.