Bottles and jars – Closures – Having warning means or means impeding closure removal
Reexamination Certificate
1999-02-26
2001-05-08
Shoap, Allan N. (Department: 3727)
Bottles and jars
Closures
Having warning means or means impeding closure removal
C215S044000, C215S045000, C215S211000, C215S214000, C215S222000, C215S341000, C215S354000, C220S293000
Reexamination Certificate
active
06227390
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a closure arrangement for a container having a neck provided over its circumference with two slanted surfaces that have correlated therewith two clamping projections of a removable closure cap which slide along the slanted surfaces for closing and opening the container.
In such known closure arrangements the closure cap is provided with two clamping projections which are embodied like brackets and which can be positioned in a certain orientation axially onto the container neck. Subsequent rotation of the closure cap results in the clamping projections being moved along to diametrically opposed slanted surfaces so that the closure cap not only performs a rotary movement but at the same time an axial movement. In this context, closure caps are known that have an insert projecting into the container neck. At the circumference of the cap insert a sealing ring is positioned which in the closed position of the closure cap sealingly rests at the inner wall of the container neck. The removal of the closure cap, in general, is carried out after extended closing periods so that the friction at the inner wall that might be caused by possible adhesion must be overcome by this sealing ring. It is possible that the closure cap is not easily accessible. For example, the aforementioned containers are used in the motor vehicle sector and are provided at locations that are difficult to access such as, for example, hydraulic oil containers. When the closure cap of such a container must be removed, it is very difficult to overcome this frictional force between the sealing ring and the inner wall of the container. For removal of the closure cap it is not only required to perform a rotary movement but also a subsequent axial movement in order to remove the closure cap from the container. It has been found that very high pulling forces are required for removing the closure cap. When the closure cap is difficult to access, it is generally also impossible to employ a tool for removal of the closure cap.
It is therefore an object of the present invention to embody the closure arrangement of the aforementioned kind such that the closure cap can be removed with minimal force application even at locations that are difficult to access.
SUMMARY OF THE INVENTION
This object is inventively solved in that each slanted surface has positioned opposite thereto at a spacing a further slanted surface, so that the slanted surfaces delimit a groove at the circumference of the container neck, and that in the circumferential direction of the container neck the width of the groove matches the width of the clamping projection of the closure cap.
The inventive closure arrangement is characterized in that at the circumference of the container neck two diagonally opposed grooves are provided which are delimited respectively by two slanted surfaces. The two grooves at the circumference of the container neck thus extend spirally. Since their width matches the corresponding dimension (size) of the clamping projection of the closure cap, the clamping projections rest, when closing the container, at the upper slanted surface and, when removing the closure cap, at the lower slated surface of the grooves. Accordingly, for closing the container as well as for opening the container an axial force is employed. The user of the inventive closure arrangement thus must only rotate the closure cap and it is no longer required to pull or push the closure cap. Due to the forced guiding of the closure cap, the rotary movement of the closure cap results at the same time in an axial movement. Thus, the closure cap can be removed even at locations that are difficult to access.
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Niethammer Bernd
Richter Winfried
Trzmiel Alfred
Hydraulik-Ring GmbH
Hylton Robin A
Robert W. Becker & Associates
Shoap Allan N.
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