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US 2003/0192724 A1Published application
Electric-powered vehicle
AssigneeNabco Limited
InventorsTakahito Inoue, Yoshinori Takezawa
Life of this patent
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AssigneeNabco Limited
InventorsTakahito Inoue, Yoshinori Takezawa
Estimating the term…
An electric-powered vehicle includes electric-powered drivers for driving wheels, a controller for controlling the electric-powered drivers to generate an assisting driving force in accordance with a vehicle operating force by an operator, and a brake-operation unit for applying braking forces on the wheels. The vehicle also includes a brake-operation detector for detecting a brake operation performed by the brake-operation unit. When the brake-operation detector detects the brake operation, the controller controls the drivers to reduce the assisting driving force. This structure solves a problem caused by simultaneous generation of the braking forces and the assisting driving force.
An electric-powered vehicle supplied with a propulsive force based on a vehicle operating force applied by an operator of said electric-powered vehicle and an assisting driving force, said electric-powered vehicle comprising:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
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Having a specific drive-type: rear wheel drive
Motor-driven: power-assistance activated by pushing on hand rim or on handlebar
Engaging the wheel: on the running surface
Parts, details or accessories: large wheels, e.g. higher than the seat portion
Term end not estimated
1. Field of the Invention
The present invention relates to an electric-powered vehicle such as an electric-powered wheelchair.
2. Description of the Related Art
FIG. 1 is a side view of an electric-powered wheelchair;
FIG. 2 is a back view of the electric-powered wheelchair shown in FIG. 1;
FIG. 3 is an enlarged side view of a vehicle operation portion;
A preferred embodiment of the present invention is described below with reference to the accompanying drawings.
FIGS. 1 and 2 are a side view and back view of an electric-powered wheelchair 1 as an example of an electric-powered vehicle. The electric-powered wheelchair 1 has a wheelchair body 2 and right and left wheels (driving wheels) 3 provided on the right and left sides of the wheelchair body 2. The wheelchair body 2 includes wheelchair frames 4 and a pair of right and left electric-powered drivers 5 which each include a motor and a speed-reducing mechanism in a housing 5a.
The right and left wheels 3 as the driving wheels are attached to the electric-powered drivers 5. The wheels 3 are rotated by driving forces generated by the electric-powered drivers 5, and the driving forces are used as part of propulsion for the electric-powered wheelchair 1. Each driving force is called the “assisting driving force”. The wheelchair body 2 has, in its front part, a pair of right and left casters 6. The wheelchair body 2 has a power-supply battery 7 disposed therein.