초록 ▼

An electrically operable liquid soap dispenser responsive to the presence of a user dispenses a measured amount of soap on demand. It has a spout with a fluid conduit therein connecting a soap reservoir and a nozzle. A pump draws soap from the reservoir during a stroke of its plunger and depending o

An electrically operable liquid soap dispenser responsive to the presence of a user dispenses a measured amount of soap on demand. It has a spout with a fluid conduit therein connecting a soap reservoir and a nozzle. A pump draws soap from the reservoir during a stroke of its plunger and depending on the embodiment, ejects a measured amount of soap during a subsequent plunger downstroke or upstroke. At least one check valve regulates the flow of soap from the reservoir to an orifice at the nozzle. The soap path from the reservoir to the nozzle is kept full of soap so that a single cycle of the pump is sufficient to eject the desired amount of soap. The orifice is sized and shaped so as to prevent dripping while maintaining soap at the nozzle ready to be ejected. A light beam emitter and detector control operation of the pump.

대표청구항 ▼

A liquid dispenser for automatically dispensing a measured quantity of liquid to a user, comprising a proximity detection means for sensing the presence of a user in a detection zone at the liquid dispenser, control means responsive to the detection means when a user is detected, said control means

A liquid dispenser for automatically dispensing a measured quantity of liquid to a user, comprising a proximity detection means for sensing the presence of a user in a detection zone at the liquid dispenser, control means responsive to the detection means when a user is detected, said control means including a means for activating a pump for dispensing the measured quantity of liquid and electrical inhibiting means for effectively locking out the operation of the liquid dispenser for a predetermined minimum interval immediately following the dispensing of liquid to the user, said pump including a solenoid and a plunger.