Pipette for volumetrically metering powder
First Claim
1. A pipette for volumetrically metering powder including powdered medicines, the pipette comprising:
- an outer metering casing enclosing a metering chamber in a peripheral direction;
said metering casing defining a free end of said pipette whereat said metering casing forms an opening;
said metering chamber having an opposite end lying opposite to said free end of said pipette;
said opposite end of said metering chamber being delimited by an air-permeable retaining element;
said retaining element being configured as a flexible filter defining a plane and having a back side facing away from said metering chamber;
an air-permeable support core supporting said filter at said back side thereof and being rigid transversely to said plane of said filter;
a metering piston arranged within said metering casing so as to be axially displaceable relative thereto;
said metering piston having an end facing toward said metering chamber; and
,a cap nut configured to attach said filter to said end of said metering piston.
1 Assignment
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Accused Products
Abstract
A pipette for volumetrically metering powder includes an outer metering casing enclosing a metering chamber. The metering casing defines a free end of the pipette whereat the metering casing forms an opening. The metering chamber has an opposite end lying opposite to the free end of the pipette and the opposite end of the metering chamber is delimited by an air-permeable retaining element. The retaining element is configured as a flexible filter defining a plane and having a back side facing away from the metering chamber. An air-permeable support core supports the filter at the back side thereof and is rigid transversely to the plane of the filter.
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Citations
10 Claims
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1. A pipette for volumetrically metering powder including powdered medicines, the pipette comprising:
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an outer metering casing enclosing a metering chamber in a peripheral direction; said metering casing defining a free end of said pipette whereat said metering casing forms an opening; said metering chamber having an opposite end lying opposite to said free end of said pipette; said opposite end of said metering chamber being delimited by an air-permeable retaining element; said retaining element being configured as a flexible filter defining a plane and having a back side facing away from said metering chamber; an air-permeable support core supporting said filter at said back side thereof and being rigid transversely to said plane of said filter; a metering piston arranged within said metering casing so as to be axially displaceable relative thereto; said metering piston having an end facing toward said metering chamber; and
,a cap nut configured to attach said filter to said end of said metering piston. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A pipette for volumetrically metering powder including powdered medicines, the pipette comprising:
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an outer metering casing enclosing a metering chamber in a peripheral direction; said metering casing defining a free end of said pipette whereat said metering casing forms an opening; said metering chamber having an opposite end lying opposite to said free end of said pipette; said opposite end of said metering chamber being delimited by an air-permeable retaining element; said retaining element being configured as a flexible filter defining a plane and having a back side facing away from said metering chamber; an air-permeable support core supporting said filter at said back side thereof and being rigid transversely to said plane of said filter; an assembly sleeve arranged within said metering casing and having an end facing toward said metering chamber; and
,a cap nut configured to attach said filter to said end of said assembly sleeve. - View Dependent Claims (8, 9)
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10. A pipette for volumetrically metering powder including powdered medicines, the pipette comprising:
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an outer metering casing enclosing a metering chamber in a peripheral direction; said metering casing defining a free end of said pipette whereat said metering casing forms an opening; said metering chamber having an opposite end lying opposite to said free end of said pipette; said opposite end of said metering chamber being delimited by an air-permeable retaining element; said retaining element being configured as a flexible filter defining a plane and having a back side facing away from said metering chamber; an air-permeable support core supporting said filter at said back side thereof and being rigid transversely to said plane of said filter; said support core is configured as a massive body having a plurality of air channels formed therein; said outer metering casing defining a peripheral wall enclosing said metering chamber; and
,at least a portion of said air channels being inclined fan-like to said peripheral wall enclosing said metering chamber.
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Specification