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Vented non-collapsing containers, dispensers and refill units having vented non-collapsing containers

  • US 10,160,590 B2
  • Filed: 02/23/2015
  • Issued: 12/25/2018
  • Est. Priority Date: 02/24/2014
  • Status: Active Grant
First Claim
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1. An inverted refill unit for a soap, sanitizer or lotion comprising:

  • a non-collapsing container;

    the non-collapsing container having a neck located at a bottom of the container when in use, wherein the neck comprises a side wall and an opening;

    an annular projection disposed on the side wall of the neck, wherein the annular projection comprises an air inlet that extends through the side wall of the neck;

    a one-way valve disposed in the air inlet, wherein the one-way valve allows air to flow into the non-collapsing container through the air inlet when the vacuum pressure in the container reaches the cracking pressure of the one-way valve, and wherein the one-way valve prevents liquid from flowing out of the air inlet; and

    a pump for pumping the contents of the container out of the non-collapsing container through the opening of the neck, wherein the pump comprises a liquid inlet that is substantially perpendicular to the air inlet of the annular projection.

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