O-ring retainer for valve stem

摘要

An O-ring retainer is disclosed that is integral with a valve stem of a valve. The valve is intended to move in a valve chamber, which valve chamber has a fluid inlet and a fluid outlet. When manually actuated, the valve moves between a first position, where it is seated against walls of the valve chamber and prevents flow through the chamber, and a second unseated position where it allows flow of the fluid through the chamber between the inlet and the outlet. An O-ring, used in conjunction with the valve and the valve chamber, is maintained in place by an outward projection from the valve stem, which projection is located just below the normally seated O-ring. Thus, if the O-ring becomes unseated, the projection, upon movement of the valve towards the seated position, bumps the O-ring back into its normal position.

主权项

1. A bar gun assembly for receiving a multiplicity of fluid carrying tubes carrying pressurized fluid, the bar gun assembly comprising:
a handle adapted to receive a multiplicity of fluids in a multiplicity of inlet ports, the handle including a multiplicity of fluid channels having a multiplicity of cylindrical fluid chambers, the fluid chambers having an inlet and an outlet port, cylindrical valve stem chamber walls, including valve stem chamber side walls and end walls, stem guide walls, valve body walls, and valve seats, the valve seats located between the inlet and outlet fluid ports; a multiplicity of valve members each having a valve stem and a valve body, the valve stem having a removed end, the valve members configured to move as a unit and to engage the fluid chambers of the handle and to longitudinally move between a first position wherein the valve body is urged against the valve seat and prevents fluid flow between the ports and a second position wherein the valve body is longitudinally spaced apart from the valve seat and permits flow between the ports; an O-ring adapted to engage the fluid chamber walls and the valve stem to substantially prevent the flow of fluid therepast regardless of the position of the valve members; and
wherein the valve stem includes an O-ring retainer to move longitudinally with the valve stem and valve body; andwherein the O-ring retainer leaves a gap between itself and the O-ring when the valve member is in the first position.