Liquid soap dispensing system

A liquid soap dispenser having only a minimal number of parts which can be assembled without the use of fastening means for dispensing repeated doses of liquid soap from an associated cartridge with a compressible outlet nipple without collapsing the side walls of the cartridge, said dispenser comprising a housing member adapted to receive the associated cartridge with the nipple, a pump member freely receivable in housing member and movable therein between a pumping position for compressing the nipple to discharge liquid soap therefrom and a release position out of engagement with the nipple, a handle member carried by said housing member in a supported condition for engagement with said pump member, said handle member in its supported condition being pivotally movable between an actuating position for driving said pump member to its pumping position and a retracted position for accommodating movement of said pump member to its release position, said pump member and said handle member cooperating when engaged to retain said pump member in said receptacle and to retain said handle member in its supported condition, and a bias unit engageable with said housing member and said pump member for resiliently urging said pump member to its release position and into engagement with said handle member, thereby to urge said handle member to its retracted position, said cartridge including a blow molded thin walled plastic container with an externally threaded neck for connection to the compressible nipple and a rear wall, a receptacle positioned in the rear wall of the cartridge adapted to receive a filter therein, a means comprising a plastic filter in said receptacle establishing an air path between the inside and outside of said cartridge, said filter having an average pore diameter of about 25 microns such that upon repeated activation of said pump member the means comprising the filter limits the vacuum inside said cartridge to not greater than 12" of water.

A liquid soap dispenser for dispensing repeated doses of liquid soap from an associated cartridge with a compressible outlet nipple without collapsing the side walls of the cartridge, said dispenser comprising a housing member adapted to receive the associated cartridge with the nipple, a pump member freely receivable in housing member and movable therein between a pumping position for compressing the nipple to discharge liquid soap therefrom and a release position out of engagement with the nipple, a handle member carried by said housing member in a supported condition for engagement with said pump member, said handle member in its supported condition being pivotally movable between an actuating position for driving said pump member to its pumping position and a retracted position for accommodating movement of said pump member to its release position, said pump member and said handle member cooperating when engaged to retain said pump member in said receptacle and to retain said handle member in its supported condition, a bias unit engageable with said housing member and said pump member for resiliently urging said pump member to its release position and into engagement with said handle member, thereby to urge said handle member to its retracted position, a horizontally extending plate having an irregularly shaped aperture therein fixedly mounted in said housing spaced from said nipple with a portion of said aperture in registry with said nipple, said cartridge comprising a blow molded thin walled plastic container with a parallelpiped body portion having a rear wall and an externally threaded cylindrical neck extending therefrom and connected to the compressible nipple, a receptacle positioned in the rear wall of the cartridge adapted to receive a filter therein, a means comprising a polytetrafluorethylene plastic filter in said receptacle establishing an air pathway between the inside and outside of said cartridge for preventing a vacuum exceeding 12" of water from developing inside said cartridge upon repeated successive operation of said pump member, said cartridge having a frustoconical portion connecting the cylindrical neck to the body portion and at least one boss extending perpendicularly to said cylindrical neck intersecting said frustoconical portion, the irregularly shaped aperture forming a seat to receive therein said cartridge frustoconical portion and said boss extending therefrom and to position said cartridge such that said nipple is in position to be contacted by said pump member.