Kubota Corporation

Yoshio Tomiyama

Hiroshi Oshima

Takashi Shibata

Masashi Osuga

Takeshi Komorida

Hiroshi Shimada

Junichi Kitamura

Nobuyuki Yamashita

Takashi Kuramoto

Eriya Harada

Hiroshi Kawabata

Hirofumi Sadakane

Kenji Nishihara

Masaki Hayashi

Hironobu Nishihara

Masami Hirooka

Katsuhiko Uemura

Takashi Fujii

Masatake Murakawa

Kazuaki Kurohara

Hiroki Nagai

Hiroyuki Ogasawara

Shizuo Shimoie

Mikio Yuki

Masatoshi Yamaguchi

Yoshitaka Matsubara

Shinichiro Saji

Satoshi Ogata

Hideo Okura

Isao Kourogi

Hitoo Nasu

Kinichi Murata

Takao Watanabe

Keiichi Masuda

Takashi Gokenya

Kazunori Yoshiuchi

Yoshishioro Okita

Yoshiaki Yanoshita

Hideo Ohkura

An operating system for a tractor to which an implement is attachable, the operating system comprises: a steering wheel provided rearwardly of a hood that houses an engine located in a forward region of the tractor; a control panel provided rearwardly of the hood and adjacent the steering wheel; a center cover extending generally vertically below the steering wheel; an operation lever provided at a position laterally of the control panel; a valve unit with a pair of spools, the valve unit being located at a lower position with respect to the steering wheel and being covered by the center cover; a link mechanism that links the operation lever and the pair of spools, the link mechanism being covered by the center cover.

Operating system for tractor

A connecting mechanism () is provided for detachably connecting A grass collecting unit () to a chassis (), and the connecting mechanism () includes a connecting unit () at the grass collecting unit side provided in a support frame assembly (), and a connecting unit () at the vehicle body side provided in the chassis (). The support frame assembly is vertically movable by the driving unit with the grass container () being supported to the ground through a support (), which selectively achieves a connecting operation performed by the connecting mechanism () for connecting the connecting unit () at the grass collecting unit side to the connecting unit () at the vehicle body side, and a releasing operation performed by the connecting mechanism () for releasing connection between the connecting unit () at the grass collecting unit side and the connecting unit () at the vehicle body side.

Lawn mower with grass collecting unit support

A hydrostatic continuously variable transmission comprises: a hydraulic pump; a power input shaft engaged with the hydraulic pump to transmit power from a power source to the hydraulic pump; a hydraulic motor in hydraulic communication with the hydraulic pump; a casing that houses the hydraulic pump and the hydraulic motor; a port block mounted to the casing, the port block having a block main body and a cover member connected to a power input side of the block main body, said cover member having an outer surface; a cooling hydraulic path provided in the port block in a region where the block main body and the cover member meet, the cooling hydraulic path being connected to a first hydraulic path in the port block, the cooling hydraulic path having a plurality of bends; a cooling fan provided on the power input shaft to provide air flow directly to the outer surface of the cover member.

Hydrostatic continuously variable transmission

A vibration damping system for an engine mounted on a vehicle has mounting elements attached to frames of the vehicle, through which elements the engine is mounted on the frames, a damping weight provided outwardly of the engine, and a weight support unit fixed at one end thereof to the engine and having the damping weight attached at the other end thereof. The weight support unit includes a first arm extending along one lateral side of a vertical plane extending through an axis of a crankshaft and a second arm extending along the other lateral side of the vertical plane. The damping weight is attached to free ends of the arms. The damping weight is positioned above the cylinder head of the engine to extend transversely of the vertical plane.

Vibration damping system for an engine mounted on a vehicle

A frame type tractor having an engine mounted in a front region of a main frame extending longitudinally of a tractor body, and a transmission case mounted in a rear region of the main frame. A backhoe mounting frame is attached to a rear end of the main frame. Rollover protection system mounts are arranged in upper portions of the backhoe mounting frame for fixedly supporting a rollover protection system. The backhoe mounting frame has a frame structure defining an inside space therein and including a pair of right and left side walls, a top wall interconnecting upper ends of the side walls, and a bottom wall interconnecting lower ends of the side walls. The right and left side walls have the rollover protection system mounts and backhoe attaching portions for engaging and connecting a backhoe unit.

Tractor with implement mounting frame

An interlock circuit for a working vehicle having a vehicle body, a working implement attached to the vehicle body, a clutch mechanism for connecting and disconnecting power to the working implement, and a shifting device for determining a traveling direction of the vehicle body. The interlock circuit has a check function to check a backward operational run in which the vehicle body travels backward with the clutch mechanism engaged, and a release function to permit a backward operational run by canceling the check function. The check function checks the backward operational run based on a signal indicating an on/off state of the clutch mechanism and a signal indicating a traveling direction of the vehicle body determined by the shifting device. The release function maintains the check function off continuously by operating a release switch when the clutch mechanism is engaged, and the signal indicating a traveling direction of the vehicle body indicates forward or neutral.

Interlock circuit for a working vehicle

A mowing machine includes a vehicle body ( ), a mower unit ( ) connected to and supported by the vehicle body and having flow generating members driven by power supplied thereto for generating grass carrier air flows, a grass catcher ( ) disposed at a rear end of the vehicle body and defining an opening for receiving grass clippings, a grass transport duct ( ) for guiding grass clippings transported by the carrier air flows to the grass catcher, and a moving mechanism ( ) for moving the grass catcher between a collecting position for connecting the grass catcher to the grass transport duct and a discharge position for separating the grass catcher from the grass transport duct. A power cutoff mechanism ( ) is provided for stopping power supply to the mower unit in response to a movement caused by the moving mechanism of the grass catcher from the collecting position to the discharge position.

Mowing machine with dumping grass catcher

This invention relates to a suspension mechanism for a front mower or a mid-mount mower. A mower housing is suspended from a tractor body through a support axis extending in a fore and aft direction, and a seesaw arm pivotable about the support axis. Housing connectors, each having an elastic element such as a spring, are arranged between the seesaw arm and mower housing.

Apparatus for suspending a mower unit from a vehicle body

A working vehicle with power steering, having a substantially closed accommodating space defined by an engine hood and a control panel, an engine disposed in the accommodating space and a steering shaft disposed in the control panel. A cooling fan produces cooling air flows moving toward the engine from an air intake formed in the control panel. A power steering apparatus for supplying steering assist power to the steering shaft, and a control unit for controlling the power steering apparatus, are arranged in the accommodating space to be exposed to the cooling air flows.

Working vehicle with power steering

A lawn mower for use in a walking mode and a riding mode. Drive of an engine is transmitted in varied speeds to rear drive wheels through stepless transmissions. The transmissions are controllable a first shift member accessible to a driver walking behind the lawn mower, and a second shift member accessible to the driver seated on a driver's seat. Operation of one of the shift members is prohibited when the other shift member is operative. The first shift member is connected to the transmissions through a drive link, a driven link, and a pin removably inserted into bores formed in the two links. A prohibiting device is movable to a position to prevent the pin from extending into one of the bores.

Lawn mower having a steering handle switchable between a walking mode

A lawn mower for use both as walking operator type and riding type, having a grass cutting unit, an engine located rearwardly thereof, a driver's seat located above the engine, a floor step located over the grass cutting unit to be movable between an open position and a closed position, and right and left rear wheels driven by the engine. The rear wheels have respective stepless transmissions operable independently of each other to transmit engine drive in different speeds to the rear wheels. These transmissions are operable by shift levers located on opposite sides of the driver's seat when the lawn mower is used as the riding type, and by control levers extending rearwardly of the driver's seat when the lawn mower is used as the walking operator type.

Lawn mower for use both as riding and walking operator type

A lawn mower for use in a walking mode and a riding mode, having a chassis frame, an engine mounted on a rearward position of the chassis frame, front wheels, driven rear wheels, transmissions for transmitting drive from the engine to the rear wheels after varying speed of the drive, a grass cutting unit suspended from the chassis frame, a driver's seat mounted on the chassis frame, and a handle post supporting control levers for controlling the transmissions. The handle post is pivotable between a first position for the walking mode in which the control levers are disposed rearwardly of the chassis frame, and a second position for the riding mode in which the control levers are disposed adjacent the driver's seat. The handle post includes a vertical post portion extending laterally of the lawn mower, and a horizontal post portion curved from the vertical post portion to extend transversely of the lawn mower. The control levers are provided on the horizontal post portion.

A walking operator type lawn mower having stepless transmissions allocated to right and left rear wheels for changing speed of engine drive and outputting the drive to the right and left rear wheels, respectively, whereby the right and left rear wheels may be driven at different speeds. Right and left control members operable by a speed control lever frictionally fixable to a selected position are interlocked to change speed arms through springs, respectively. The change speed arms are pivotable, following operation of the shift levers, for controlling change speed rates of the stepless transmissions. The change speed arms are also operable by a pair of right and left auxiliary levers to move toward a backward drive position regardless of speed setting position of the speed control lever. A constant speed straight cruising run is obtained by retaining the speed control lever in a selected position to operate the change speed arms of the right and left transmissions substantially the same amount. In this state, one of the right and left auxiliary levers may be operated to shift the corresponding change speed arm from the selected speed position to a different speed position, e.g. to a lower speed position or to a backward drive position, thereby realizing a desired turning mode.

Transmission system capable of driving right and left drive wheels at

A lawn mower controllable by a walking operator and having two control levers each for controlling a brake and a propelling clutch. Each control lever is pivotable to a 'run' position to engage the clutch and render the brake inoperative, a 'neutral' position to disengage the clutch and render the brake inoperative, and a 'stop' position to disengage the clutch and operate the brake. Each control lever is constantly urged to the 'stop' position by a spring. The lawn mower further includes a locking lever for maintaining the control levers in the respective 'neutral' positions and 'stop' positions. The lawn mower is driven by an engine to engage in a grass cutting operation with the control levers maintained in the 'run' positions by the urging springs. The operator may push the mower to engage in a grass cutting operation with the control levers maintained in the 'neutral' positions by the locking lever. When the control levers are locked to the 'stop' positions by the locking lever, the lawn mower is stopped to allow the operator to engage in a different operation.

Growing community of inventors

Osaka, Japan

Yoshio Tomiyama