Pump for a liquid dispensing hair removal device
View Patent ↗A liquid dispensing unit for a hair removal device with a reservoir and an applicator in liquid communication with the reservoir. A first and second connector are in liquid communication with the reservoir. The first and second connector each have a respective first and second valve. A resilient tube is disposed between the connectors. The resilient tube has a neutral position with both valves closed and a second position with one valve open and one valve closed.
1. A liquid dispensing unit for a hair removal device comprising:
a reservoir containing a liquid;
an applicator in liquid communication with the reservoir;
first and second connectors in liquid communication with the reservoir, the first and second connectors each having a respective one of first and second valves;
a resilient tube having an outer surface, the resilient tube disposed between the first and second connectors; and
an actuator aligned with the resilient tube, the actuator having an inner surface contacting the outer surface of the resilient tube, wherein the resilient tube has a neutral position with both valves closed and a second position with one valve open and one valve closed, wherein the first valve opens and the second valve is closed upon depressing the actuator radially to compress the resilient tube and the second valve opens and the first valve is closed upon releasing the actuator to allow the resilient tube to return to a non compressed state.
2. The liquid dispensing unit of claim 1 wherein the valves have a flattened end with an open position to permit liquid to pass when pressure is applied and a closed position to prevent liquid back flow when pressure is removed.
3. The liquid dispensing unit of claim 1 wherein the resilient tube has a Shore A hardness of 50 to 90.
4. The liquid dispensing unit of claim 1 , 2 , or 3 wherein the resilient tube has a wall thickness of 0.5 mm to 2.0 mm.
5. The liquid dispensing unit of claim 1 , 2 , or 3 wherein the first valve is disposed within the first connector and the first connector is disposed within one end of the resilient tube.
6. The liquid dispensing unit of claim 1 , 2 , or 3 wherein the first valve is disposed within the first connector at one end of the resilient tube and the second valve is disposed within the second connector at the other end of the resilient tube.
7. The liquid dispensing unit of claim 1 , 2 , or 3 wherein the reservoir is a flexible laminated sachet.
8. The liquid dispensing unit of claim 7 wherein the reservoir has a layer comprising a metal.
9. The liquid dispensing unit of claim 1 , 2 , or 3 wherein the resilient tube comprises silicone.
10. The liquid dispensing unit of claim 1 , 2 , or 3 wherein the resilient tube may be compressed 360 degrees along its surface to open one of the valves.