Patent ID: 11926303
Assignee: ROBERT BOSCH GMBH
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 14:
15. A hydraulic block for a hydraulic modulator for a vehicle hydraulic-power brake system, comprising:
a non-return valve including:
a valve-seat part having a valve seat;
a shut-off member;
a valve spring which presses the shut-off member against the valve seat; and
a valve cage that is disposed on the valve-seat part, in which the shut-off member and the valve spring are located and which supports the valve spring;

wherein:
the valve-seat part has an elevation, and the valve cage has an annular shoulder which abuts against an end face of the elevation and which changes over at an outer periphery of the annular shoulder into a tubular collar that has a press fit with a circumferential surface of the elevation;
the hydraulic block has a recess as a non-return-valve mounting having an annular step against which the valve-seat part abuts outside the elevation; and
the non-return valve includes at least one of the following features (a)-(e):
(a) a total height of the valve-seat part is not greater than approximately one third of a maximum diameter of the valve-seat part;
(b) the valve cage has passages that extend in a lift direction of the shut-off member, nearly up to the valve-cage annular shoulder, the passages being cutouts in a wall of the valve cage and extending from a radial interior of the valve cage to a radial exterior of the valve cage;
(c) the end face of the elevation, against which the annular shoulder abuts, is, of all end faces of the valve-seat part, most proximal to the valve spring;
(d) an edge of the tubular collar, which edge has the press fit against the circumferential surface of the elevation, is a terminating edge of the valve cage; and
(e) the valve cage and the valve-seat part are structured such that when the valve cage and the valve-seat part are separate from each other, prior to the annular shoulder being arranged to abut against the end face of the elevation and without any pressure being radially applied to them, an inner diameter of the tubular collar is narrower than an outer diameter of the circumferential surface of the elevation.