Patent ID: 7513351
Filing Date: 2009-04-07
Classification: B60W,F16H,Y10T

Abstract:
1. A piston for an automatic transmission including a pair of mutually meshing gears mounted on respective two parallel shafts, said piston comprising a bottom portion; and a cylindrical portion to be disposed radially outwardly of one of said pair of mutually meshing gears, wherein said cylindrical portion has a cutout formed in a first circumferential part thereof to permit mutual meshing engagement of said pair of mutually meshing gears such that a point of the mutual meshing engagement is located within a cutout of said cylindrical portion, said cylindrical portion further having a through-hole formed in a second circumferential part thereof so that a speed sensor extends through said through-hole to detect a rotating speed of said one of said pair of mutual meshing gears, and the through-hole is located at an opposite side to the cutout with respect to a center of a cross-section of the piston.