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Oil-hydraulic vehicle
This invention provides an oil-hydraulic vehicle whose driving force can be adjusted finely and which can be run smoothly and comfortably. The oil-hydraulic vehicle comprises a wheel-driving means 40 for driving a wheel 31 , which includes an oil-hydraulic motor 45 to drive the wheel 31 and a means 41 for controlling the rotational frequency of the oil-hydraulic motor 45 . The oil-hydraulic motor 45 includes an output shaft 45 s on which the wheel 31 is mounted and a plurality of oil chambers 45 a - 45 e . Each oil chamber contains (i) a driving cogwheel 46 which is mounted on, and drives, the output shaft 45 s and (ii) a driven cogwheel 47 which engages with the driving cogwheel 46 . The means 41 for controlling the rotational frequency of the oil-hydraulic motor 45 includes a housing 42 with a circular rotor chamber 42 h in it and a rotor 43 fitted in the circular rotor chamber 42 h for free rotation.

Dual-circuit steer-by-wire steering system comprising a common cradle
The invention relates to a steer-by-wire steering system comprising a hydraulic control unit that acts on the steerable wheels ( 1, 20 ), the control unit having at least one cradle ( 4, 23 ), which is displaceably mounted on at least one guide rod ( 5, 24 ) that passes through the respective cradle ( 4, 23 ). The respective cradle ( 4, 23 ) and the corresponding guide rod(s) ( 5, 24 ) form working chambers (A 11 , A 12 , A 21 , A 22 ) of a piston-cylinder system, whereby each respective guide rod ( 5, 24 ) has at least one channel (KA 11 , KA 12 , KA 21 , KA 22 ), each terminating in the vicinity of a working chamber (A 11 , A 12 , A 21 , A 22 ). The cradle or cradles ( 4, 23 ) adjust the steerable wheels ( 1, 20 ) directly or by means of steering tie rods ( 2, 21 ).

Vehicle having twin transmissions for driving respective wheels
A vehicle comprises a vehicle frame, a prime mover mounted on the vehicle frame, a laterally turnable wheel disposed at one side of the vehicle frame, a pair of drive wheels disposed at the other side of the vehicle frame, a steering operation device, a traveling operation device for setting the traveling speed and direction of the vehicle, and a pair of transmissions for controlling the rotary speed and direction of the respective drive wheels. The transmissions are operationally connected with the steering operation device so as to create a difference of rotary speed between the drive wheels according to operation of the steering operation device. The transmissions are operationally connected with the traveling operation device so as to drive the drive wheels in a common rotary direction from their stationary state according to operation of the traveling operation device. A clutch is interposed between the transmissions so as to connect the drive wheels with each other when the steering operation device is set in a straight traveling position. Based on setting of a switching device for switching the traveling direction of the vehicle between forward and rearward, a reverser decides the rotational direction of the drive wheels.

Personal propulsion device with hands free control
An improved personal propulsion device that generally imparts thrust directly to the user. The device allows hands free control of thrust magnitude and direction so both hands can grasp and control bicycle handlebars and brakes, watercraft paddles, ski poles, etc. The device is adjustable vertically, on the users' back, higher to allow sitting in a canoe or wheelchair and lower for standing on skates, skis, kick scooters etc. A user on a bicycle may prefer to lean forward for comfort and aerodynamics, a device adjustment compensates and delivers level thrust. A user on a snowboard or skateboard stands oblique to the direction of travel, a device adjustment allows in line thrust. Both users' hands and arms are free to balance, protect others by pushing off or break a fall.

Pedestrian impact sensing apparatus for a vehicle bumper
An impact sensing apparatus includes a laterally extending air channel within a block of foam or other crushable medium disposed between a bumper fascia and a rigid bumper frame element, and one or more airflow sensors for detecting airflow within the air channel. The air channel may be defined by a flexible hollow tube embedded within the crushable medium or by a molded-in air cavity in cases where the crushable medium is formed by molding. The measured airflow provides a measure of crush rate, and two or more airflow sensors may be distributed within the air channel to optimize impact detection response time and to identify the impact location.

Underbody structure of vehicle
An underbody structure of a vehicle includes a floor panel of which rear portion is raised to form a rear floor, a pair of left and right rear side frames extending generally along a longitudinal axis of the vehicle at the rear of the floor panel with a specific distance held between the left and right rear side frames across the vehicle, and a rear cross member extending widthwise across the vehicle and interconnecting forward end portions of the left and right rear side frames. A fuel tank is mounted between the left and right rear side frames, and the rear cross member is located under the floor panel at the front of the fuel tank.

Hydraulic traction system for vehicles
A hydraulic traction system for vehicles is described. The system comprises a hydraulic vane motor mounted at each wheel of the vehicle, and equal number of identical hydraulic vane motors operated as engine driven pumps, and a control system for regulating the flow and direction of hydraulic oil during operation. The hydraulic motor is of a novel design that has a hollow non-drive shaft that accepts incoming hydraulic oil, this allows internal components of the hydraulic motor to be arranged in such a way to improve the efficiency of the hydraulic traction system.

Protective structure for an electrical circuit device
A protective structure for an electrical circuit device attached to a vehicle includes a resin case, an electrical circuit, and a rigid body. The electrical circuit is contained in the resin case. The rigid body is contained in the resin case. The rigid body protrudes toward a collision-prone side of the vehicle beyond the resin case. The rigid body deforms or displaces to absorb collision energy when the vehicle is involved in a collision on the collision-prone side.

Motorcycle rear fender structure
To provide a rear wheel fender structure for motorcycles, which can be molded with a simplified and inexpensive mold assembly even where the rear wheel finder is so designed and so structured as to permit component parts to be fitted thereto and as to block the splashing of water and/or mud, the rear wheel fender structure 27 is positioned above the motorcycle rear wheel 14 and includes an upper fender 39 and a lower fender 40 secured to a bottom region of the upper fender 39 . An adiabatic space 99 is preferably formed between the upper fender 39 and the lower fender 40.

Support structure of parts for vehicle
A support structure of parts for a vehicle including: a tray fixed to a structural member of a vehicle body for mounting a first part thereto; a retainer member for retaining the first part on the tray; and a vertically extending support member for supporting a second part on the side of the first part. The support member is connected to the tray at a lower end thereof and to the retainer member at an upper end thereof.