Patent ID: 6945431
Filing Date: 2005-09-20
Classification: A47K,B01F

Abstract:
1. A piston pump for dispensing ingredients of cosmetic preparations and that is easy disassembled for cleaning and sanitization purposes, the piston pump being detachably connected to an outlet port of a cosmetic ingredient package, the piston pump comprising: a valve block comprising an inlet port threadably connected to a nipple which is detachably connected to the outlet port of the cosmetic ingredient package, the valve block further comprising a piston port threadably detachably connected to a cylinder and an outlet port that sealably receives a valve stem, the inlet port, outlet port and piston port being in fluid communication with one another upon removal of the valve stem from the valve block, the valve stem comprising an intake passage and an output passage, the cylinder slidably receiving a piston, the cylinder comprising a distal end threadably connected to the piston port of the valve block and a proximal end, the valve stem being detachably connected to an actuator, the actuator capable of moving the valve stem to an intake position where the valve stem blocks the outlet port of the valve block and the valve block blocks the output passage of the valve stem and intake passage of the valve stem provides communication between the nipple and the piston port thereby permitting flow from the package, through the nipple, through intake passage of the valve stem, through the piston port and into the cylinder upon movement of the piston towards the proximal end of the cylinder, the actuator further being capable of moving the valve stem to a dispense position where the valve stem blocks the inlet port of the valve block and the valve block blocks the intake passage of the valve stem and the output passage of the valve stem is in communication with the cylinder thereby permitting flow from the cylinder, through the output passage of the valve stem and out the valve stem upon movement of the piston towards the distal end of the cylinder.