Patent application number | Description | Published |
20080202113 | Tandem Pump Unit - The present invention provides a tandem pump unit that includes: a first hydraulic pump and a second hydraulic pump respectively having a first pump shaft and a second pump shaft respectively having adjacent ends connected together so that the first and second pump shafts are coaxially aligned and non-rotatably connected in tandem; a common housing for accommodating the first hydraulic pump and the second hydraulic pump; and a first center section and a second center section that respectively support the first and second hydraulic pumps. | 08-28-2008 |
20080202838 | Hydraulic Transaxle Apparatus For A Four-Wheel-Drive Vehicle and Four-Wheel-Drive Vehicle Using The Apparatus - An articulated vehicle with a working device has a first frame having a prime mover mounted thereon and supporting a first transaxle apparatus. The first transaxle apparatus includes an input shaft receiving power from the prime mover, a pair of first axles, and a hydrostatic transmission. The hydrostatic transmission comprises a variable hydraulic pump, a first hydraulic motor fluidly connected to the hydraulic pump via a fluid passage, and a housing with a flexible port fluidly connected to the fluid passage. The second transaxle apparatus includes a pair of second axles having different lengths and a second hydraulic motor. The second hydraulic motor is fluidly connected via piping to a directionally adjustable connection portion of the flexible port. Proximal ends of the first and second frames with respect to the vehicle are coupled to each other so that the first and second frames are rotatable around a vertical axis relative to each other when steered. | 08-28-2008 |
20080296080 | Hydraulic Transaxle And Vehicle Comprising It - A hydraulic transaxle comprises a transaxle casing for supporting left and right axles, a pair of hydraulic motors disposed in the transaxle casing so as to drive the respective left and right axles, hydraulic ports provided in the transaxle casing so as to fluidly connect the pair of hydraulic motors in parallel to a common hydraulic pump, and a system for restricting or canceling differential rotation of the pair of hydraulic motors. | 12-04-2008 |
20090008183 | Pump Unit and Hydrostatic Transmission - There is provided a pump unit configured to be capable of transmitting a rotational per from a driving power source which is operatively connected thereto to an actuator through a pair of hydraulic fluid lines. The pump unit includes: an input shaft; a hydraulic pump main body; a PTO shaft; a PTO clutch mechanism; and auxiliary pump main body; a suction line; a discharge line; a charge line; a PTO hydraulic fluid line; a pressure-reducing valve; and a resistance valve. The PTO hydraulic fluid line and the charge line are fluidly connected to the primary side and a secondary side of the pressure-reducing valve, respectively. | 01-08-2009 |
20090308069 | Pump Unit And Working Vehicle - A pump unit applied to a working vehicle includes an input shaft operatively connected to an output shaft of a driving source, first and second hydraulic pump bodies, a pump housing that accommodates the first and second hydraulic pump bodies having respective rotational axis lines parallel to the input shaft, a PTO shaft, and a mounting housing that couples the pump housing with the driving source in a state that the pump housing is free from the vehicle frame. The input shaft is supported by the pump and is parallel to the output shaft of the driving source, and extends outwardly from a surface of the pump housing that faces the driving source and is inserted into the mounting housing. The PTO shaft is supported by the pump housing and is parallel to the input shaft and extends outwardly from a surface of the pump housing that is opposite to the surface that faces the driving source. | 12-17-2009 |
20100011758 | HST Unit - An HST unit includes a first hydraulic motor unit for operatively driving one of a pair of driving wheels; a second hydraulic motor unit for operatively driving the other one of the pair of driving wheels; a hydraulic pump unit operatively connected to a driving power source, the hydraulic pump unit configuring a traveling hydrostatic transmission in cooperation with the first and second hydraulic motor units; and an attachment frame for supporting the first hydraulic motor unit, the second hydraulic motor unit and the hydraulic pump unit, the attachment frame being attachable to a vehicle frame. | 01-21-2010 |
20100199656 | Hydraulic Pump Unit - A hydraulic pump unit of variable displacement type is disposed away from a pair of hydraulic motor units which are capable of being independently arranged. The pump unit is fluidly-connected to the pair of hydraulic motor units so as to change the outputs of the pair of hydraulic motor units in both forward and reverse rotation directions. The pump unit includes a hydraulic pump body operatively rotated and driven by a driving source, a pump case surrounding the hydraulic pump body, a capacity adjusting mechanism for changing the capacity of the hydraulic pump body, and an actuator for operating the capacity adjusting mechanism. The actuator is controlled based on a manual operation signal corresponding to a manual operation amount. | 08-12-2010 |
20100257856 | Pump Unit And Hydrostatic Transmission - There is provided a pump unit configured to be capable of transmitting a rotational per from a driving power source which is operatively connected thereto to an actuator through a pair of hydraulic fluid lines. The pump unit includes: an input shaft; a hydraulic pump main body; a PTO shaft; a PTO clutch mechanism; and auxiliary pump main body; a suction line; a discharge line; a charge line; a PTO hydraulic fluid line; a pressure-reducing valve; and a resistance valve. The PTO hydraulic fluid line and the charge line are fluidly connected to the primary side and a secondary side of the pressure-reducing valve, respectively. | 10-14-2010 |