Patent ID: 11866023
Assignee: BWI (SHANGHAI) CO., LTD.
Field: Mechanical elements (Mechanical engineering)
Classification: CPC B  F | IPC B  F

Claim 7:
8. A blow-off metering valve for a hydraulic control unit assembly of a brake system of a vehicle for reducing noise from a pump, comprising:
a valve seat for being located in a bore of the hydraulic control unit assembly, the valve seat including a wall generally having a sleeve shape and extending about an axis and extending axially between a first end and a second end;
the wall defining a passage extending axially between the first and second ends for transmitting a fluid through the valve seat;
an annular flange extending axially from the second end of the wall toward the first end of the wall and tapering radially inwardly to define an annular flange;
a blocking member axially aligned with the annular flange and axially movable toward and away from the annular flange for creating a seal to inhibit the flow of fluid through the passage of the valve seat when the blocking member engages the annular flange;
a compression spring biasing the blocking member toward the annular flange, the compression spring including a plurality of windings, wherein the plurality of windings include a plurality of outer windings and a plurality of inner windings, wherein the outer windings have a larger radius than the inner windings for eliminating spring stack and allowing fluid to more easily pass through the spring;
wherein the blocking member is a ball, wherein at least one of the inner windings engages the ball, and wherein at least one of the outer windings extends about the ball for centering the ball on the valve seat.