Kenyon & Kenyon
Power-assisted cart
 A power-assisted cart includes a wheeled platform for supporting a load thereon; driving wheels mounted on the wheeled platform for, when driven, moving the wheeled platform; a drive unit for driving the driving wheels; an operating unit which may be in the form of a handle mounted on the wheeled platform for receiving an external force applied thereto when the cart is desired to be moved; a force detector for detecting a magnitude and direction of the external force applied to the operating unit; and a control for generating to the drive unit an output substantially proportional to the external force detected by the force detector. 
Matsushita Electric Works, Ltd.
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B60L B62B B60L Y02T B60K B62B Y02T B62B B60L B60L B60L B60L Y02T B62D B60L B62B B60L Y02P
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Shigeki Hideki Hiroshi
Fujiwara Yamashita Maeda