Patent ID: 6505529
Filing Date: 2003-01-14
Classification: F16H,Y10T

Abstract:
A reversing transmission shiftable when under load comprising:an oil reservoir (5); a first and second shifting clutches (1, 2) used as reversing clutches and operated by respective first and second piston chambers (10, 23); an actuating device (8) for controlling the first and second shifting clutches (1, 2), to be shifted to one of a closed position and an open position for a change of driving direction; the closed position being obtained by lowering a pressure in the piston chambers (10, 23) acting against a respective first and second tension springs (12, 26) in the piston chambers (10, 23) and the open position being obtained by increasing the pressure in the piston chambers (10, 23); and wherein at least one of the first and second piston chambers (10, 23) has a first and a second intake bore (9, 13, 22, 24), the first intake bore (13, 22) is closed by a valve (14, 21) when the second intake bore (9, 24) is subjected to pressure, and the first intake bore (13, 22) is opened to allow fluid flow through the piston chambers (10, 23) when the second intake bore (9, 24) is connected via said actuating device (8) with the oil reservoir (5).