FOAM PUMP
First Claim
1. A foam dispensing system comprising:
- a dispenser housing,the dispenser housing having an actuator for causing the dispensing of a foam and a holder for receiving a liquid reservoir;
a liquid reservoir;
a rotary liquid pump havinga pump housing wherein a least a portion of the pump housing has a substantially circular cross-section;
a liquid inlet in fluid communication with the liquid reservoir and a liquid outleta sealing member located between the liquid inlet and the liquid outlet;
a liquid pump rotor having one or more recesses located therein, wherein during operation, the sealing member is configured to seal against the one or more recesses when the recess is located against the sealing member; and
a liquid outlet in fluid communication with a mixing chamber;
an air pump having an air inlet and an air outlet;
the air outlet in fluid communication with the mixing chamber; and
an outlet nozzle, wherein the mixing chamber is in fluid communication with the outlet nozzle.
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Accused Products
Abstract
Dispensing systems and refill units are disclosed herein. One exemplary refill unit includes a liquid reservoir and a rotary liquid pump having a liquid inlet in fluid communication with the liquid reservoir. The rotary liquid pump includes a housing, wherein at least a portion of the housing is resilient and a rotor that has one or more apexes. During operation, the one or more apexes contact the resilient portion of the housing and deflect the resilient portion of the housing resulting in the movement of a liquid. A mixing chamber having a liquid inlet and an air inlet is also provided. The liquid pump outlet is in fluid communication with the mixing chamber liquid inlet and the air inlet if in fluid communication with an air pump. An outlet nozzle is in fluid communication with the mixing chamber outlet for dispensing foam formed by mixing the liquid and air together.
68 Citations
20 Claims
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1. A foam dispensing system comprising:
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a dispenser housing, the dispenser housing having an actuator for causing the dispensing of a foam and a holder for receiving a liquid reservoir; a liquid reservoir; a rotary liquid pump having a pump housing wherein a least a portion of the pump housing has a substantially circular cross-section; a liquid inlet in fluid communication with the liquid reservoir and a liquid outlet a sealing member located between the liquid inlet and the liquid outlet; a liquid pump rotor having one or more recesses located therein, wherein during operation, the sealing member is configured to seal against the one or more recesses when the recess is located against the sealing member; and a liquid outlet in fluid communication with a mixing chamber; an air pump having an air inlet and an air outlet; the air outlet in fluid communication with the mixing chamber; and an outlet nozzle, wherein the mixing chamber is in fluid communication with the outlet nozzle. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A refill unit for a foam dispensing system comprising:
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a liquid reservoir connected to a rotary liquid pump; the liquid rotary pump including a housing, wherein at least a portion of the housing is resilient and extends along a plane; and a rotor, wherein at least a portion of the rotor includes a planar portion, a liquid inlet in fluid communication with the liquid reservoir; and a liquid outlet in fluid communication with a mixing chamber; the mixing chamber having an air inlet; a one-way check valve in fluid communication with the air inlet for preventing liquid from passing through the air inlet of the mixing chamber. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A refill unit for a dispensing system comprising:
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a liquid reservoir; a rotary liquid pump having a liquid inlet in fluid communication with the liquid reservoir; the rotary liquid pump having a housing, wherein at least a portion of the housing is resilient; the rotary liquid pump having a rotor that has one or more apexes wherein during operation, the one or more apexes contact the resilient portion of the housing and deflect the resilient portion of the housing; a mixing chamber having a liquid inlet and an air inlet; the liquid pump outlet in fluid communication with the mixing chamber liquid inlet; an outlet nozzle in fluid communication with the mixing chamber for dispensing foam. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification