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Title:
【発明の名称】プランジャポンプを備えた圧力媒体搬送装置
Document Type and Number:
Japanese Patent JP2994060
Kind Code:
B2
Abstract:
The intention is to reduce the structure-borne noise emission of the reciprocating piston pump. …The reciprocating piston pump (11) is assigned an outlet valve (24) which has a valve seat (23) and a valve closing element (ball 25) accommodated in a cavity (26) and loaded by a closing spring. Only one outlet bore (30) branches off from the cavity (26), starting radially from the circumferential region of the valve seat (23). The cavity-side opening of the outlet bore (30) extends at least approximately between the valve seat (23) and the closing-spring end of the gap of least cross-section formed between the valve closing element (ball 25) and the inner circumference of the cavity (26). A slowed opening movement of the valve closing element (ball 25) is thereby obtained, an opening gap with its largest cross-section of passage in the region of the outlet bore (30) opening up. The delivery flow, rising slowly as the outlet valve (24) opens, results in a slower rate of change of the force in the drive train of the reciprocating piston pump (11) and a reduced emission of structure-borne noise. …The pump installation can be used, for example, in hydraulic motor-driven brake systems with an anti-lock system and/or a drive-slip control (traction control) system. …

Inventors:
Wolfgang Schuler
Hans Phaser
Rolf Hummel
Michael Klose
Gunter Klentz
Application Number:
JP3411791A
Publication Date:
December 27, 1999
Filing Date:
February 28, 1991
Export Citation:
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Assignee:
ROBERT BOSCH GMBH
International Classes:
F04B53/00; B60T8/40; F04B11/00; F04B53/10; (IPC1-7): F04B53/10
Domestic Patent References:
JP57184770A
JP5578183A
JP222673U
JP56101266U
JP63152971U
Attorney, Agent or Firm:
Toshio Yano (2 outside)