There is provided a pump unit (1) for transmitting mechanical power from a driving source (150) through fluid power to first and second hydraulic motor units (160a,160b) allocated and arranged on both sides in a width direction of a vehicle so as to be out...

According to the present invention an improved hydraulic transmission system is provide which comprises: supply means adapted to supply a variable flow rate of hydraulic working fluid, said supply means comprising hydraulic adjustment means for adjusting t...

The control system for a hydraulic drive comprising linear or rotary motors (3, 4) operating a pump (2) comprises a first pair of control lines (23, 25) in one of the lines (6) linking the motors and pump. These are connected with cylinders (15, 17) contai...

An HMT apparatus (T) is mounted on a vehicle (A). In the HIVIT apparatus (T), input rotational force from an engine (13) is once divided into two systems which are then transmitted by an MT device (23) and by an HST device (24) respectively and are resynth...

A control system (16) for a utility vehicle transmission provides for operator selection of vehicle "aggressiveness," or rates of acceleration in response to operator command. The aggressiveness of a vehicle's performance can be controlled by modulating co...

The drive unit includes a hydraulic fixed displacement motor (5) for a drive wheel and a hydraulic medium delivery device as well as further delivery means (7,7a,8) which increases the delivery volume of the hydraulic medium to the motor. The additional de...

The present invention discloses a traveling control device, including a crawler type right and left traveling body; a right and a left hydraulic motor (22,21) for operating the right and left traveling body using each hydraulic pump (24,23) as a hydraulic ...

A drive system 10 for all-wheel drive vehicles is provided having separate front and rear transaxles 20,30 powered by a single engine 50 through a power transfer system 51. The transaxles 20,30 each include a transmission, preferably a hydraulic transmissi...