Baths – closets – sinks – and spittoons – Flush closet – Tank only
Reexamination Certificate
1998-11-18
2001-05-22
Phillips, Charles E. (Department: 3751)
Baths, closets, sinks, and spittoons
Flush closet
Tank only
C004S651000
Reexamination Certificate
active
06233752
ABSTRACT:
FIELD OF THE INVENTION
The invention relates to a cistern body for a flushing cistern, having an interior in which fittings, in particular an inflow and outflow fitting, are to be accommodated.
BACKGROUND OF THE INVENTION
Cistern bodies of this type are known in general. They are usually produced from ceramic material or plastic. In recent years, an improved flushing method has made it possible to reduce to a considerable extent the quantity of water necessary for flushing. Accordingly, it has been possible for the cistern body to be constructed with a smaller volume. However, the smaller interior of the cistern bodies has resulted in difficulties as regards accommodating the fittings, that is to say, in particular, the inflow and outflow fitting. In the case of flush-mounted flushing cisterns in particular, this has resulted in the operation of installing the inflow and outflow fitting being complex and more laborious. In the case of these flushing cisterns, these fittings have to be introduced through an inspection opening arranged on the front or at the top. In addition, the overall depth is comparatively small in these flushing cisterns.
SUMMARY AND OBJECTS OF THE INVENTION
The object of the invention is to provide a cistern body of the type mentioned which avoids these difficulties. Nevertheless, the intention is for the cistern body to be functionally reliable and capable of being produced cost-effectively.
The object is achieved, in the case of a cistern body of the generic type, in that at least one functional part of the inflow or outflow fitting is integrated in the wall of the cistern body. In the case of the cistern body according to the invention, the wall thus forms part of an inflow or outflow fitting. This corresponding functional part is, in this case, integrated in the cistern body and, of course, then no longer has to be provided on the fitting part which is to be installed. Shifting at least one functional part to the outside into the wall of the cistern body makes it possible to produce smaller fittings, which are correspondingly easier to introduce into the cistern body. According to one development of the invention, the functional part integrated in the wall of the cistern body is an overflow channel. In the case of the outflow fitting, the customary overflow pipe can then be replaced by a narrow rod. It is possible for the external diameter of the outflow fitting to be reduced correspondingly. A narrower outflow fitting takes up less space in the interior of the cistern body and is considerably easier to install, for example through the inspection opening of a flush-mounted flushing cistern, and also to remove again, for inspection purposes. It is likewise easier to carry out adjusting work on the fittings.
According to one development of the invention, the functional part integrated in the cistern body is an inflow channel. Up until now, this channel has usually been provided on the inflow fitting as a downwardly projecting pipe. Shifting the inflow channel into the wall of the cistern body, then, makes it possible to produce a considerably smaller and more compact inflow fitting, which is correspondingly easier to install and to produce.
It has been found that, for the integration of said functional parts and for other functional parts as well, it is particularly advantageous to produce the cistern body by blow molding. These functional parts, and in particular pipes and channels, can be produced without additional process steps by blow molding. These functional parts are preferably integrally formed by pinching. For this purpose, two mold parts have interacting pinching parts which are correspondingly directed towards one another. In this case, said functional parts are provided fixedly on the cistern body and form an integrated part of the side walls and/or of the cistern base. These functional parts are preferably integrally formed on the cistern body and thus form part of the wall. It is preferred to produce the cistern body by blow molding. However, other production processes are also conceivable. Functional parts here are intended to mean parts which, up until now, were usually parts of the inflow or outflow fitting or of other fittings accommodated in the cistern interior. Fastening parts are not covered by such functional parts.
The invention makes it possible to produce cistern bodies with an even smaller volume than has been the case hitherto. While having a further expected improvement in the flushing method and thus even smaller quantities of flushing water than has been the case hitherto, the invention can avoid the problems inherent in the production and installation of the flushing-cistern fittings. The basic idea of the invention is thus seen in the fact that functional parts hitherto provided on fittings and flushing cistern fittings are shifted to the outside and integrated in the cistern body. The preferred production by blow molding makes it possible for such cistern bodies to be realized in a particularly straightforward and cost-effective manner.
The invention also relates to a flushing cistern having a cistern body and to a particularly suitable process for producing a cistern body according to the invention.
The various features of novelty which characterize the invention are pointed out with particularity in the claims annexed to and forming a part of this disclosure. For a better understanding of the invention, its operating advantages and specific objects attained by its uses, reference is made to the accompanying drawings and descriptive matter in which preferred embodiments of the invention are illustrated.
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Collen Law Associates P.C.
Geberit Technik AG
McDermott Robert M.
Phillips Charles E.
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