Master brake cylinder for automobile, has lateral surfaces parallel to bore axis, central groove separating longitudinal ribs, and cavities respectively connecting ends of longitudinal holes of ribs to bore

• Main Authors: BOURGOIS LIONEL, BOURLON PHILIPPE
• Format: Patent
• Language: English; French
• Published: 06.03.2009
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKINGWITHOUT ESSENTIALLY REMOVING MATERIAL; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES,OTHERWISE THAN BY ROLLING; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; PERFORMING OPERATIONS; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OFVEHICLES; PUNCHING METAL; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TRANSPORTING; VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES; VEHICLES IN GENERAL; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

The cylinder has lateral surfaces parallel to axis (XX') of a bore of the cylinder, where the cylinder is made of plastic, aluminum or aluminum alloy. The surfaces do not include projections. A plane surface (p1) has transversal holes (tr1, tr2) placed with respect to the axis. A central groove (ra1) separates longitudinal ribs (n2, n3). The ribs are respectively pierced with longitudinal holes (tr3, tr4). Cavities respectively connect ends of the holes (tr3, tr4) to the bore. An independent claim is also included for a method for fabricating a master brake cylinder. L'invention concerne un maître cylindre de frein dont toutes ses surfaces latérales parallèles à l'axe (XX') de l'alésage (al1) du cylindre ne possèdent pas de protubérance. L'invention concerne également un procédé de fabrication d'un maître cylindre selon lequel un profilé est fabriqué par extrusion et des corps de maîtres cylindres sont découpés dans ce profilé.Applications: Maître cylindre de freins automobiles.