Method of preparing replaceable liquid soap reservoir
AssigneeHygiene-Technik Inc.
InventorHeiner Ophardt
Life of this patent
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Abstract
A method of preparing a liquid reservoir disposable pump for insertion into a permanent dispenser housing is disclosed. The pump comprises two basic unitary, preferably all plastic, elements: a chamber forming body having an open outer end and an inner end in fluid communication with the liquid reservoir, and a piston formed to slidably fit into the chamber. The reservoir and pump are prepared for insertion into the permanent housing by first substantially filling the reservoir with liquid, and then evacuating air from the reservoir by applying a vacuum to the outer end of the chamber to provide vacuum pressure sufficient to draw air out of the chamber and reservoir.
Claims20
A method of preparing a replaceable fluid reservoir for insertion into a dispenser housing, wherein said reservoir has coupled thereto a pump assembly which when activated dispenses fluid from said reservoir,
- said pump assembly including,
- a chamber-forming element having a chamber, said chamber having chamber wall, an outer open end and an inner end in fluid communication with said reservoir, and
- one-way valve means disposed across said chamber permitting fluid flow therepast through the chamber only from the reservoir outwardly towards the outer open end, said one-way valve means permitting air to be drawn therepast towards the outer open end under a first negative pressure while permitting fluid to be drawn therepast under a second negative pressure which is further below atmospheric pressure than said first negative pressure,
- said method comprising the steps of:
- substantially filling said reservoir with fluid, and
- evacuating air from said reservoir by applying a vacuum to a portion of said chamber which is spaced outwardly from said one-way valve means,
- said vacuum providing vacuum pressure at least as far below atmospheric pressure as said first negative pressure to draw out air from said chamber and said reservoir.
A method of preparing a replaceable liquid soap reservoir for insertion into a permanent dispenser housing, wherein said reservoir has coupled thereto a pump assembly which when activated dispenses soap from said reservoir,
- said pump assembly including,
- a chamber-forming element having a chamber, said chamber having chamber wall, an outer open end and an inner end in fluid communication with said reservoir, and
- one-way valve means disposed across said chamber permitting fluid flow therepast through the chamber only from the reservoir outwardly via the outer open end, said one-way valve means permitting air to be drawn from said reservoir outwardly therepast under a first negative pressure while permitting fluid to be drawn from said reservoir outwardly therepast under a second negative pressure further below atmospheric pressure than said first negative pressure,
- said method comprising the steps of:
- substantially filling said reservoir with fluid, and evacuating air from said reservoir with fluid, and evacuating air from said reservoir by applying a vacuum to said outer open end of said chamber,
- said vacuum providing vacuum pressure at least as far below atmospheric pressure as said first negative pressure to draw out air from said chamber and said reservoir.
Dependencies are inferred from the claim text.