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    • 10. 发明公开
    • PROTECTIVE SHEATHING OF A DISC BRAKE PISTON-CYLINDER UNIT
    • COVER用于盘式制动器活塞/缸体单元
    • EP2591247A2
    • 2013-05-15
    • EP11751644.3
    • 2011-07-05
    • Freni Brembo S.p.A.
    • SCOTTI, FabioGOTTI, AntonioPUDDU, Armando
    • F16D65/00
    • F16D65/005F16D55/228F16D65/00F16D65/0068F16D65/18F16D2121/04F16D2125/06F16J3/02F16J3/042F16J15/52
    • Flexible sheathing for the protection of piston-cylinder units for disc brakes are provided. Such flexible sheathing may be arranged in a retracted condition wherein the piston is completely accommodated within the cylinder and in an extended condition wherein the piston is completely extracted from a caliper body defining the cylinder, said piston having a piston outer surface suitable to co-operate with a cylinder inner surface of the caliper body which accommodates the piston, said outer surface having a predefined piston diameter and said cylinder inner surface having a predefined cylinder diameter, wherein said piston comprises a piston body and a head thereof suitable to press against a pad of the disc brake. Such sheathing may include a sheathing body, which in the retracted condition, of a disc-shaped configuration which develops from an inner diameter to an outer diameter; said outer diameter being greater than said cylinder diameter; said inner diameter being lower than the piston diameter and defining a sheathing portion developing from said inner diameter to said piston diameter; a first hooking ring being arranged along the sheathing outer diameter suitable to be fixed to a caliper body; a second hooking ring being arranged along the inner diameter of the sheathing suitable to be fixed to a piston; a plurality of folds consisting of folds that consist of portions of said sheathing body which are folded such as to have the surfaces thereof directly facing each other and such as to allow the extension of the sheathing during the outward movement of the piston from the cylinder of the caliper body; wherein the plurality of folds is totally arranged on said sheathing portion which extends from the inner diameter to the piston diameter. Pistons incorporating such flexible sheathings and calipers incorporating such pistons are also provided.