Pump dispenser for a container with a flexible bag
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United States of America Patent
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Jun 23, 1998
Issued Date -
N/A
app pub date -
Dec 7, 1995
filing date -
Apr 8, 1994
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A dispenser for substances that are at least partially fluid includes an outer casing (1) fitted with a pump (4) having a tubular body (5). The tubular body is provided with a vent (5e) that is closed when a piston of the pump is in a rest position. A flexible bag (3) is connected to the pump beneath the vent by means of a bushing (2) that forms a ring which has a cylindrical skirt (2b) connected to a top band (2a) and forms a flange (2c, 2e) for centering and support purposes against the outer casing. A counter-flange (7a) connects the pump to the outer casing in a sealed manner. Communication (2f) is established between a lower intermediate space (1c) surrounding the bag and an upper intermediate space (1b) that is associated with the vent. Conservation of the substance is improved and filling and purging air are simplified.
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