Closure device for containers
First Claim
1. A pipetting apparatus for transferring an internal calibrated volume of fluid having a wiping cap device for removing all non-calibrated residue fluid attached to the smooth conical shaped outside surface of a pipette tip during fluid transfer from a container, the wiping cap device comprising:
- a tubular member having an open end;
a wiping cap including a base and a cup shaped member, said wiping cap coupled to said open end of said tubular member, said cup shaped member comprising a conical resilient wiper section extending to a conical tip, said wiper section getting smaller in the direction away from said open end to create a substantial closure at the conical tip of said wiper section and being configured to include at least one helically formed slot extending from said substantial closure forming a wiper finger, said wiper finger rotating substantially more than one revolution and being adapted to be unobstructed and resiliently held in complete circumferential contact against said outside surface of said pipette tip inserted therethrough including squeegee like means to remove all said residue fluid attached to said smooth outside surface when said pipette tip is withdrawn axially through said wiper finger whereby said outside surface has said residue fluid removed and leaving said internal calibrated fluid within said pipette tip for fluid transfer; and
said wiping cap including means for securing said wiping cap to said tubular member.
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Accused Products
Abstract
A wiping cap closure device used for removing the non-calibrated residue fluid attached to the outside surface of a pipette tip during the fluid transfer from a container. The wiping cap is constructed using a conical shaped resilient wiper section extending to a conical tip. The conical shaped wiper section is configured to include at least one helical formed slot extending from said conical tip forming at least one wiping finger. The wiping finger is resiliently held against the outside surface of the pipette tip inserted therethrough during the fluid transfer. The wiping finger provides squeegee like means to remove all of the non-calibrated residue fluid inadvertently attached to the outside surface of the tip as the pipette tip is withdrawn from the container leaving the non-calibrated residue fluid within the container for further evaluations or tests.
72 Citations
18 Claims
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1. A pipetting apparatus for transferring an internal calibrated volume of fluid having a wiping cap device for removing all non-calibrated residue fluid attached to the smooth conical shaped outside surface of a pipette tip during fluid transfer from a container, the wiping cap device comprising:
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a tubular member having an open end; a wiping cap including a base and a cup shaped member, said wiping cap coupled to said open end of said tubular member, said cup shaped member comprising a conical resilient wiper section extending to a conical tip, said wiper section getting smaller in the direction away from said open end to create a substantial closure at the conical tip of said wiper section and being configured to include at least one helically formed slot extending from said substantial closure forming a wiper finger, said wiper finger rotating substantially more than one revolution and being adapted to be unobstructed and resiliently held in complete circumferential contact against said outside surface of said pipette tip inserted therethrough including squeegee like means to remove all said residue fluid attached to said smooth outside surface when said pipette tip is withdrawn axially through said wiper finger whereby said outside surface has said residue fluid removed and leaving said internal calibrated fluid within said pipette tip for fluid transfer; and said wiping cap including means for securing said wiping cap to said tubular member. - View Dependent Claims (2, 3, 4, 5, 6, 18)
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7. A sealable wiping device comprising:
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a tubular member having an open end; a wiping cap including a cup shaped member configured to occlude the open end of said tubular member when said wiping cap is positioned in said open end, said cup shaped member comprising a conical resilient wiper section extending to a conical tip, said conical shape of said wiper section getting smaller in diameter in the direction away from said open end to create a substantial closure at the conical tip of said wiper section and being configured to include at least one helically formed slot extending from said substantial closure forming a wiper finger, said wiper finger rotating substantially more than one revolution and being adapted to be unobstructed and resiliently held in complete circumferential contact against the smooth conical outside surface of a pipette tip inserted therethrough, said wiper finger including squeegee like means to remove all non-calibrated residue fluid attached to said smooth outside surface of said pipette tip when said pipette tip is withdrawn axially through said wiper finger; and a locking cap configured to be received into said cup shaped member of said wiping cap so as to form a seal therebetween. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification