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Sequentially activated multi-diaphragm foam pumps, refill units and dispenser systems

  • US 10,080,468 B2
  • Filed: 12/05/2016
  • Issued: 09/25/2018
  • Est. Priority Date: 12/04/2015
  • Status: Active Grant
First Claim
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1. A foam dispenser comprising:

  • a housing;

    a container for holding foamable liquid;

    a foam pump in fluid communication with the container wherein the foam pump includes;

    a pump housing;

    a diaphragm assembly;

    the diaphragm assembly havinga liquid pump diaphragm in fluid communication with the container;

    a plurality of air pump diaphragms; and

    an outlet valve;

    a mixing chamber for mixing foamable liquid from the liquid pump diaphragm with air from the plurality of air pump diaphragms;

    a foam cartridge in fluid communication with the mixing chamber;

    an outlet for dispensing foam wherein the outlet is in fluid communication with the foam cartridge; and

    an actuation mechanism to sequentially activate the liquid pump diaphragm and the plurality of air pump diaphragms.

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