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1. (WO1979000123) A CHANGE-OVER VALVE,PREFERABLY FOR A RAILWAY VEHICLE
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1979/000123 International Application No.: PCT/SE1978/000035
Publication Date: 22.03.1979 International Filing Date: 25.08.1978
IPC:
B60T 8/18 (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
8
Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
18
responsive to vehicle weight or load, e.g. load distribution
Applicants:
Inventors:
Priority Data:
770982801.09.1977SE
Title (EN) A CHANGE-OVER VALVE,PREFERABLY FOR A RAILWAY VEHICLE
(FR) SOUPAPE DE PERMUTATION, DE PREFERENCE POUR VEHICULE FERROVIAIRE
Abstract:
(EN) A change-over valve (or a so called empty-load valve), preferably for a railway vehicle, having a valve device (16, 31-35) opening or closing a pneumatic passageway depending on the position of a mechanical operating system or in other words the load on the vehicle. In order to improve the working range of the external operating arm (4) and the exactness of the change-over point the operating system is a force transmitting chain from said operating arm to the valve device (16, 31-35) via a spring (9), a knee lever (13), and a valve operating rod (14) in such a geometrical way that the axis of the spring is substantially perpendicular to the valve operating rod.
(FR) Soupape de permutation (ou soupape dite de charge a vide), de preference pour un vehicule ferroviaire, ayant un dispositif de soupape (16, 31-35) d"ouverture et de fermeture d"un passage pneumatique dependant de la position d"un systeme a commande mecanique, en d"autres termes, de la charge sur le vehicule. En vue d"ameliorer le champ d"action du bras de commande exterieur (4) et l"exactitude du point de permutation, le systeme de commande consiste en une chaine de transmission de force allant de ce bras de commande au dispositif de soupape (16, 31-35) via un ressort (9), un levier a genouillere (13), et une tige de commande de soupape (14) ayant une disposition geometrique telle que l"axe du ressort soit perpendiculaire a la tige de commande de soupape.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)