Patent ID: 7985124
Filing Date: 2011-07-26
Classification: B60H,F16K

Abstract:
1. A drum flap comprising: a circumferential surface of a part-cylinder, wherein the circumferential surface forms a first region, two circle segment surfaces forming lateral side surfaces of the part-cylinder, wherein each circle segment surface forms a second region, an externally surrounding rim, which is arranged substantially in two planes, projects perpendicularly outward from the circumferential surface along two edges of the circumferential surface that run along a longitudinal direction of the circumferential surface, and serves to bear against correspondingly designed bearing surfaces, at least a second rim, which serves to bear against a corresponding designed bearing surface, a third region with a planar surface, wherein the second rim extends above the planar surface of the third region and runs substantially around the third region, and a planar intermediate region arranged at an angle not equal to 180° from the third region, wherein the third region indirectly adjoins a lateral surface in a region of the externally surrounding rim via the intermediate region.