Shut-off system for a dispenser
View Patent ↗A shut-off system for a dispenser includes a pinch member that moves relative to a guide and which is normally biased against a flexible outlet tube that is disposed therebetween. The flexible outlet tube that carries material, such as soap, supplied from a pump to an outlet nozzle. The pump and the pinch member are in operative engagement with an actuator, such that when the actuator is not engaged, the pinch member closes the outlet tube to prevent residual material retained in the outlet tube from flowing or drooling out of the outlet nozzle. Correspondingly, when the actuator is engaged, the pump is compressed, and the pinch member is moved away from the outlet tube, allowing the material to be pumped through the outlet tube and dispensed from the outlet nozzle.
1. A method of dispensing material from a container comprising:
providing a dispenser having a frame;
a pump attached to said frame, said pump having an inlet adapted to be fluidly coupled to the container to allow said pump to receive material therefrom, said pump coupled to an outlet nozzle by an outlet tube;
a guide attached to said frame, said guide having at least one elongated slot disposed therein;
a pinch member moveably carried by said at least one slot, wherein said outlet tube is disposed between said guide and said pinch member;
at least one biasing member; and
an actuator pivotably coupled to said frame;
biasing said pinch member to a normally biased position to compress said outlet tube closed;
actuating said actuator to move the actuator and engage said pinch member prior to said actuator directly engaging and comprising said pump to pressurize the material therein;
moving said pinch member along said length of said at least one slot from said normally biased position to open said outlet tube;
dispensing said pressurized material from said outlet tube and out of said nozzle by said pump;
releasing said actuator; and
moving said pinch member along said length of said at least one slot to said normally biased position to compress said outlet tube closed.
2. The method of claim 1 , wherein said guide includes a pair of spaced support arms extending from a frame of said dispenser, each said support arm including one said slot, moveably carrying said pinch member within each said slot.
3. A dispenser to dispense material from a refill container comprising:
a frame;
a pump attached to said frame, said pump having an inlet adapted to be fluidly coupled to the refill container to allow said pump to receive material therefrom, said pump coupled to an outlet nozzle by an outlet tube;
a guide attached to said frame, said guide having at least one elongated slot disposed therein;
a pinch member moveably carried by said at least one slot, wherein said outlet tube is disposed between said guide and said pinch member;
at least one biasing member directly biasing said pinch member to a normally biased position to compress said outlet tube closed; and
an actuator pivotably coupled to said frame, wherein when said actuator is actuated, it is moved to operatively engage said pinch member prior to directly engaging and compressing said pump to pressurize the material therein;
wherein as said actuator is moved, said pinch member is moved along a length of said at least one slot from said normally biased position to open said outlet tube, whereupon the pressurized material is delivered by said pump through said outlet tube and out of said outlet nozzle, such that upon the release of said actuator, said pinch member moves along said length of said at least one slot to said normally biased position to compress said outlet tube closed.
4. The dispenser of claim 3 , wherein an elongated engagement ridge extends from said pinch member, said engagement ridge contacting said outlet tube when said pinch member is normally biased.
5. The dispenser of claim 3 , wherein said at least one biasing member comprises a spring attached to said pinch member and to said frame.
6. The dispenser of claim 3 , wherein said guide includes a pair of spaced support arms extending from said frame, each said support arm including one said elongated slot, such that said pinch member is moveably carried by each said slot.
7. The dispenser of claim 6 , wherein a pair of protrusions extend from said pinch member, each said protrusion configured to be received within respective said slots.