Dragons Den Michael Pritchard’s US Patent Application for Anyway Spray


Inventor Michael Pritchard appeared on Season 7 of the BBC’s Dragons’ Den touting his “Anyway Spray,” a product that allows a household spray bottle to operate an any orientation through the use of a selectively permeable tube.  I thought the invention was brilliant, and wondered why the Dragons were giving Pritchard such a hard time.

There was one problem, though – Pritchard said he had applied for various patents, but none had yet been granted.  The Dragons were concerned about the lack of action on his long-pending patent applications.

I searched for and found the International application of Pritchard’s invention for a “fluid delivery device.”

Abstract

A container (10) for liquids is provided, in which pressurisation of the container is used to force the liquid through one or more membranes to an output. The membranes are disposed across substantially an entire length of the container, and pass liquid in preference to air. As a result, the liquid may be extracted from the container in any orientation. A particular use for this kind of container is as a portable water bottle containing a filter (20).

Independent Claim #41

41. A device for removing impurities from a liquid, the device comprising:a fluid path defined by a liquid reservoir, a filter, and an output; and,a pump for pressurising the liquid reservoir such that, when the output is in an open position, a pressure differential induces a flow of liquid along the fluid path through the filter to the output, the pump comprising:a non-return valve through which air may be pumped into the liquid reservoir; and,a piston shaft through which a piston head may be moved such that air is pumped through the non-return valve, wherein,the piston shaft is substantially surrounded by the filter.

Independent Claim #58

58. A fluid delivery device comprising:a fluid path defined by a liquid reservoir, one or more membranes, and an output;wherein the fluid path is arranged such that, when the output is in an open position a pressure differential induces a flow of liquid along the fluid path through the one or more membranes to the output;and wherein the one or more membranes and the liquid reservoir are arranged such that liquid in the reservoir is in contact with the membranes when the device is in substantially any orientation, and the one or more membranes are adapted to pass liquid in preference to gas.

Here is a link to the US National Stage Application. US20090173673A1

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