Patent ID: 11953065
Assignee: ZF ACTIVE SAFETY US INC.
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F  B | IPC F

Claim 13:
14. A piston assembly for a disc brake assembly having a housing with a passage, comprising:
a piston provided in the passage and axially movable therein in response to hydraulic pressure;
a rotatable spindle extending into the piston;
a nut threadably connected to the spindle such that rotation of the spindle results in axial movement of the nut within the passage to thereby axially move the piston;
a volume reducer connected to the nut and having a recess; and
an annular damping member provided in the recess and having a circular cross-section in the circumferential direction, the damping member having a rolling interface between the recess and the piston in response to relative axial movement between the nut and the piston to prevent rattling of the nut against the piston.