The present invention relates to a piston (10 ) for a brake caliper (1) comprising a side wall (11) mainly extending along an axial direction (A-A) between a first annular edge (12) configured to come into contact with a first brake pad (4) and a second annular edge (13) configured to receive a thrust from a brake fluid, a septum (14) extending at least along a radial direction (R-R), wherein said radial direction (R-R) is transverse to said axial direction (A-A), wherein said septum (14) comprises a first pad-side surface (15) adapted to face said first brake pad (4) and a second brake fluid-side surface (16), wherein said side wall (11) and said septum (14) delimit a thrust seat (18) and a ventilation chamber (17), wherein said thrust seat (18) and said ventilation chamber (17) are fluidically separated along said axial direction (A-A) by said septum (14), wherein said thrust seat (18) is open at said second annular edge (13) and is closed at said second brake fluid-side surface (16), wherein said thrust seat (18) is adapted to receive at least partially a thrust device (19) to mechanically actuate the piston (10) by biasing said first brake pad (4), wherein said ventilation chamber (17) is open at said first annular edge (12) and is closed at least by said first pad-side surface (15), wherein said ventilation chamber (17) is adapted to accommodate air to thermally insulate the septum (14), wherein said side wall (11) comprises a first side wall portion (20) having a first outer diameter (De1) and a second side wall portion (21) having a second outer diameter (De2), wherein said first outer diameter (De1) is greater than said second outer diameter (De2), wherein said first side wall portion (20) internally delimits at least said ventilation chamber (17), wherein said second side wall portion (21) internally delimits said thrust seat (18) at least partially, wherein said piston (10) comprises a third annular edge (22) mainly extending along said radial direction (R-R), wherein said third annular edge (22) externally connects said first side wall portion (20) and said second side wall portion (21) in an undercut manner to receive a thrust from said brake fluid.
BRAKE CALIPER PISTON AND BRAKE CALIPER
BREMSSATTELKOLBEN UND BREMSSATTEL
PISTON D'ÉTRIER DE FREIN ET ÉTRIER DE FREIN
2025-04-30
Patent
Electronic Resource
English