| 摘要 |
A handtruck for use in carrying a load, comprises springs installed on a frame, a connection shaft received rotatably in bearings mounted on the opposite end portion of the springs and substantially parallel with the lateral extend of the frame, a support member for supporting a first pair of wheels which is fixed to the connection shaft, and another support member for supporting a second pair of wheels which is also firmly fixed to the same. A rotation shaft is rotatably mounted on the support member for supporting the second pair of wheels in order to cause the second wheels to rotate around the shaft axis approximately normal to the axis of the connection shaft.
|
