Expansible chamber devices – Piston
Reexamination Certificate
2006-12-18
2011-10-18
Leslie, Michael (Department: 3745)
Expansible chamber devices
Piston
C029S888040
Reexamination Certificate
active
08037810
ABSTRACT:
A piston for a hydraulic brake configured as a bowl, open on one side, with a longitudinal axis, a wall and a bottom, and is delimited on an open end face by a rim with an axial abutment surface which is movable into abutment on a brake pad. The bottom has an essentially plane outside surface, a wall thickness of the bottom is thicker than a minimum wall thickness of the wall, and at a transition area between bottom and wall, a wall thickness of the wall is continuously increasing towards the bottom, thus, the wall passing over into the bottom in a slope. Furthermore, a method including forming a disc-shaped round blank into a bowl-type hollow cylinder, and upsetting the hollow cylinder in its longitudinal axis so that the bottom material is thickened due to the upsetting operation.
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Bauer Herwig
Leidecker Hans-Dieter
Leidecker Norbert
Mehner Götz
Würz Matthias
Continental Teves AG & Co. oHG
Leslie Michael
RatnerPrestia
Sander Umformtechnik GmbH & Co., KG
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