O-ring retainer for valve stem

A bar gun assembly for receiving a multiplicity of fluid carrying tubes carrying pressurized fluids, 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 generally cylindrical fluid chambers, each fluid chamber having an inlet and an outlet port, stem guide walls, generally cylindrical valve stem chamber side walls and end walls, valve body walls, and a valve seat, the valve seat located between the inlet and the outlet 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 engage the fluid chambers and moveable 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 spaced apart from the valve seat and permits flow between the ports;
• an O-ring having outer walls, the O-ring adapted to engage in a normal position, the valve stem chamber side walls and the valve stem chamber end walls, the O-ring to substantially prevent the flow of fluid therepast regardless of the position of the valve member;
• wherein the valve stem includes an O-ring retainer moveable therewith;
• wherein the O-ring retainer is located between the removed end of the valve stem and the valve body;
• wherein the O-ring retainer is located between the closer of the inlet or outlet port and the removed end of the valve stem;
• wherein the O-ring retainer is a substantially disk-shaped projection integral with the valve stem, including a top surface, bottom surface, and perimeter;
• and
• wherein the O-ring retainer leaves a small gap between the top surface thereof and the O-ring when the O-ring is normally seated and the valve member is in the first position.

A bar gun assembly for receiving a multiplicity of fluid carrying tubes carrying pressurized fluids, 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 generally cylindrical fluid chambers, each fluid chamber having an inlet and an outlet port, stem guide walls, generally cylindrical valve stem chamber side walls and end walls, valve body walls, and a valve seat, the valve seat located between the inlet and the outlet 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 engage the fluid chambers and moveable 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 spaced apart from the valve seat and permits flow between the ports;
• an O-ring having outer walls, the O-ring adapted to engage in a normal position, the valve stem chamber side walls and the valve stem chamber end walls, the O-ring to substantially prevent the flow of fluid therepast regardless of the position of the valve member;
• wherein the valve stem includes an O-ring retainer moveable therewith;
• wherein the O-ring retainer is located between the removed end of the valve stem and the valve body;
• wherein the O-ring retainer is located between the closer of he inlet or outlet port and the removed end of the valve stem;
• wherein the O-ring retainer has finger projections engaging the valve stem;
• and
• wherein the O-ring retainer leaves a small gap between itself and the O-ring
• when the O-ring is normally seated and the valve member is in the first position.