F - Mech Eng,Light,Heat,Weapons – 16 – H
Patent
F - Mech Eng,Light,Heat,Weapons
16
H
74/105
F16H 47/08 (2006.01) F16H 47/04 (2006.01)
Patent
CA 1113281
ABSTRACT OF THE DISCLOSURE A three-mode, hydromechanical transmission including a pair of hydraulic displacement units forming a hydrostatic transmission and having a first, low-speed hydrostatic mode and a second and -third intermediate and high speed hydromechanical modes. In one embodiment, a pair of planetaries are related to form a four-element differential and are associated with an input shaft and the hydrostatic transmission and brake and clutch means. The hydrostatic transmission drives an output shaft through a connection to one of the planetaries, with the brake means engaged. A first clutch means in a drive train from the input shaft to one planetary effects the second mode of operation with the brake disengaged and a second clutch means in a parallel drive train to another element of the planetaries effects the third mode of operation, with the brake and first clutch means disengaged. In another embodiment, tnree planetaries are utilized to provide the same three modes of operation, with an extended third mode and with the brake means connected to an element in at least two of the planetaries and with one of said drive trains also being connected to an element in more than one of the planetaries.
307816
George H. Riches And Associates
Sundstrand Corporation
LandOfFree
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