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1. (WO1997018115) HYDRAULIC PRESSURE GENERATOR WITH VIBRATION DAMPING
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1997/018115 International Application No.: PCT/EP1996/003880
Publication Date: 22.05.1997 International Filing Date: 04.09.1996
Chapter 2 Demand Filed: 10.03.1997
IPC:
B60T 11/16 (2006.01) ,B60T 11/18 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
60
VEHICLES IN GENERAL
T
VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
11
Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
10
transmitting by fluid means, e.g. hydraulic
16
Master control, e.g. master cylinders
B PERFORMING OPERATIONS; TRANSPORTING
60
VEHICLES IN GENERAL
T
VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
11
Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
10
transmitting by fluid means, e.g. hydraulic
16
Master control, e.g. master cylinders
18
Connection thereof to initiating means
Applicants:
ROBERT BOSCH SISTEMI FRENANTI S.P.A. [IT/IT]; Via Cavalli, 53/A Casella Postale 66 I-26013 Crema, IT (AllExceptUS)
CADEDDU, Leonardo [IT/IT]; IT (UsOnly)
Inventors:
CADEDDU, Leonardo; IT
Agent:
BENTZ, Jean-Paul; Bosch Systèmes de Freinage Service Brevets 126, rue de Stalingrad F-93700 Drancy, FR
Priority Data:
TO95A00091514.11.1995IT
Title (EN) HYDRAULIC PRESSURE GENERATOR WITH VIBRATION DAMPING
(FR) GENERATEUR DE PRESSION HYDRAULIQUE A AMORTISSEMENT DE VIBRATIONS
Abstract:
(EN) The invention relates to a hydraulic pressure generator comprising, in a body (1), a piston assembly (2) delimiting a pressure chamber (12) and comprising a cylinder (21) wherein a bore (211) receives an auxiliary piston (22) which delimits a compensation variable volume chamber (23), the latter containing a deformable member (5) intended to exert a spring force between the auxiliary piston (22) and the obturated extremity (210) of the cylinder (21). According to the invention, the compensation chamber (23) communicates with the pressure chamber (12) through a restriction (221) provided in a longitudinal bore (222) of the auxiliary piston (22), the seal (4) which closes the pressure chamber (12) being carried by a portion (220) of the auxiliary piston which remains outside the second bore (211). Application to the damping of pressure variations.
(FR) L'invention concerne un générateur de pression hydraulique comprenant, dans un corps (1), un ensemble piston (2) délimitant une chambre de pression (12) et comprenant un cylindre (21) dans lequel est percé un alésage (211) recevant un piston auxiliaire (22) qui y délimite une chambre de compensation (23) à volume variable, cette dernière renfermant un organe déformable (5) propre à exercer une force élastique entre le piston auxiliaire (22) et l'extrémité obturée (210) du cylindre (21). Selon l'invention, la chambre de compensation (23) communique avec la chambre de pression (12) à travers une restriction (221) pratiquée dans un perçage longitudinal (222) du piston auxiliaire (22), le joint d'étanchéité (4) qui ferme la chambre de pression (12) étant porté par une portion (220) du piston auxiliaire qui reste à l'extérieur du second alésage (211). Application à l'amortissement des variations de pression.
Designated States: JP, US
European Patent Office (AT, BE, CH, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
Publication Language: French (FR)
Filing Language: French (FR)
Also published as:
EP0861178US5878578JP2000500093