Processing

Please wait...

PATENTSCOPE will be unavailable a few hours for maintenance reason on Saturday 31.10.2020 at 7:00 AM CET
Settings

Settings

Goto Application

1. WO1996041738 - BRAKE SERVO HAVING A SIMPLIFIED COMPENSATION SPACE

Publication Number WO/1996/041738
Publication Date 27.12.1996
International Application No. PCT/FR1996/000614
International Filing Date 23.04.1996
Chapter 2 Demand Filed 06.11.1996
IPC
B60T 13/57 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
TVEHICLE 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
13Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
10with fluid assistance, drive, or release
24the fluid being gaseous
46Vacuum systems
52indirect, i.e. vacuum booster units
57characterised by constructional features of control valves
CPC
B60T 13/57
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
TVEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL
13Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
10with fluid assistance, drive, or release
24the fluid being gaseous
46Vacuum systems
52indirect, i.e. vacuum booster units
57characterised by constructional features of control valves
Applicants
  • BOSCH SYSTEMES DE FREINAGE [FR]/[FR] (AllExceptUS)
  • GAUTIER, Jean, Pierre [FR]/[FR] (UsOnly)
  • VERBO, Ulysse [FR]/[FR] (UsOnly)
  • CARRE, Jean, Jacques [FR]/[FR] (UsOnly)
Inventors
  • GAUTIER, Jean, Pierre
  • VERBO, Ulysse
  • CARRE, Jean, Jacques
Agents
  • BENTZ, Jean-Paul
Priority Data
95/0674308.06.1995FR
Publication Language French (FR)
Filing Language French (FR)
Designated States
Title
(EN) BRAKE SERVO HAVING A SIMPLIFIED COMPENSATION SPACE
(FR) SERVOMOTEUR A VOLUME DE COMPENSATION SIMPLIFIE
Abstract
(EN)
A pneumatic brake servo using two air pressure sources and including a rigid shell (3) divided into at least two chambers (3a, 3b) by a movable sealing wall (4) capable of being biased by a pressure differential caused by the operation of a valve (7) that includes a tubular sealing member (70) defining, together with an inner piston surface (510), a compensation space (74) in continuous communication with the second chamber (3b). The sealing member (70) of the valve (7) has a continuous sealing surface opposite the two seats (71, 72), and the compensation space (74) communicates with the second chamber (3b) via an axial bore in a thicker portion (S) of the cylindrical wall (51) of the pneumatic piston (5).
(FR)
L'invention concerne un servomoteur pneumatique de freinage utilisant deux sources de pression d'air et comprenant une enveloppe rigide (3) séparée par une cloison mobile étanche (4) en au moins deux chambres (3a, 3b), la cloison mobile étant susceptible d'être sollicitée par une différence de pression provoquée par l'actionnement d'un clapet (7), ce clapet comprenant un organe d'obturation tubulaire (70) délimitant avec une face interne (510) du piston un volume de compensation (74) relié en permanence avec la seconde chambre (3b). Selon l'invention, l'organe d'obturation (70) du clapet (7) présente, en regard des deux sièges (71, 72), une surface continue et étanche, et le volume de compensation (74) est relié à la seconde chambre (3b) par un perçage axial d'une portion (S) de plus grande épaisseur de la paroi cylindrique (51) du piston pneumatique (5).
Also published as
Other related publications
Latest bibliographic data on file with the International Bureau