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Annular ring elementRelated Patent Categories: Hydraulic And Earth Engineering, Marine Structure Or Fabrication Thereof, Cast In SituAnnular ring element description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20070166108, Annular ring element. Brief Patent Description - Full Patent Description - Patent Application Claims
CROSS-REFERENCES TO RELATED APPLICATIONS [0001] This application claims the priority of Austrian Patent Application A 280/2004 filed Feb. 20, 2004, and is a U.S. National Phase application of PCT/AT2005/000048 filed Feb. 14, 2005, both of which disclosures are incorporated herein by reference. STATEMENT AS TO RIGHTS TO INVENTIONS MADE UNDER FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT [0002] NOT APPLICABLE REFERENCE TO A "SEQUENCE LISTING," A TABLE, OR A COMPUTER PROGRAM LISTING APPENDIX SUBMITTED ON A COMPACT DISK. [0003] NOT APPLICABLE BACKGROUND OF THE INVENTION BRIEF SUMMARY OF THE INVENTION [0004] The invention relates to a device according to the preamble of claim 1. [0005] It is known to build conduits or pipe-cased shafts, channel shafts, manholes, maintenance shafts or pipelines from individual sections, modules, liners or annular elements, whereby the annular elements are transported to the building site and are assembled on site. [0006] Usually, shafts or lines of this type are lowered, laid or moved in the ground and for the most part poured in concrete or placed as industrially produced prefabricated parts, i.e. in the form of pipe-cased shafts cast in concrete. To give the construction as secure and permanent a support as possible in the preset position, longitudinal and/or transverse ribs are configured on the outer side of the elements. [0007] In conventional forms of the annular elements, the longitudinal ribs extend parallel to the generatrix and/or parallel to the central median axis of the cylindrical or truncated conical annular element. The direction of projection direction, i.e. the direction in which the longitudinal ribs point, is essentially radial, i.e. pointing radially outward from the median axis of the annular element. [0008] By this type of radial construction of the longitudinal ribs, the production of the elements, optionally by injection-molding processes, is expensive and difficult since it results in undercuts when removing the finished component from the die. Consequently, expensive mold constructions are required during compression molding or injection molding of the elements. [0009] The object of the invention is to avoid the aforementioned disadvantages. [0010] Furthermore, it is the object of the invention to provide elements of the above-noted type for pipe-cased shafts, channel shafts, manholes, maintenance shafts or pipes, optionally to be poured in concrete or cast, which are as stable and waste-water resistant as possible and that are permanently secured in their position, in particular against distortions or destructions or separations caused by ground movements and which or whose individual parts can be easily and simply produced or removed from the mold and that can be simultaneously stored, stacked or transported in a space-saving manner. [0011] According to the invention, this is attained by the characterizing features of claim 1. This does not result in any undercuts of the longitudinal ribs when removing from the mold, instead the mold can be pulled off from the annular element along the direction of forming without damaging the longitudinal ribs or it being necessary to fold or bend the form or the annular element. At the same time, there are defined resistance forces or directions of force for the anchoring. [0012] Structurally and with respect to strength, it is especially advantageous if the features of claim 2 are developed. [0013] For structural reasons and to make the annular element more stable, it is advantageous if the features of claim 3 are developed. [0014] To ensure a better anchoring in the ground or in the surrounding ground or concrete, the features of claim 4 are advantageously developed. [0015] To give the construction additional stability and rigidity and to be able to better anchor the elements in the surrounding ground or concrete, it is advantageous if the features of claim 5 are developed. [0016] The features of claim 6 give the advantage that the production is simpler since the size of the mold and the machines can be reduced and that the segments of the pipe-cased shaft can be more easily transported with greater space-savings. [0017] The features of claim 7 ensure that many similar parts can be produced in a single production form. [0018] For production reasons, it is advantageous if the features of claim 8 are developed. This substantially facilitates the removal of the mold from the production machine or the injection-molding machine since it can be pulled off without undercutting the ribs or bending or cracking the annular element or mold. [0019] In this connection, it is especially advantageous if the features of claim 9 are developed. Continue reading about Annular ring element... Full patent description for Annular ring element Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Annular ring element patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. 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