Patent ID: 8656654

Claim:
A shaft arrangement, comprising: a shaft top part, wherein the shaft top part includes a shaft cone having an access opening at one end of the shaft cone, and having a connecting element on an opposite end of the shaft cone, the shaft cone having a substantially convex dome shape, first stiffening structures disposed on an inner surface of the dome-shaped shaft cone so as to extend substantially radially or parallelly, angularly or concentrically from one or more imaginary points or lines within or outside the shaft cone, the first stiffening structures extending downwards along a curved shape of the shaft cone, and lift prevention elements provided on a radially outer surface of the shaft cone, wherein the lift prevention elements are comprised of ribs, webs, lugs, knobs and/or spikes; and a shaft element, the shaft top part being connected to the shaft element via the connecting element of the shaft cone, wherein the shaft element is a sewage shaft or a water pump shaft; and wherein the shaft top part is made from thermoplastically workable plastics by means of an injection moulding process.