|국가/구분||United States(US) Patent 등록|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 3 인용 특허 : 3|
A wheel system includes a frame, a wheel rotatably mounted to the frame, and a lifter. The lifter defines a first end and a second end. The first end of the lifter is pivotably mounted to the frame, and the second end of the lifter defines a contact surface. The contact surface of the lifter is adapted to establish initial contact with a vertically disposed obstacle, and thereafter the lifter is configured to pivot about the first end such that the wheel is lifted and translated over the vertical obstacle.
1. A wheel system comprising: a frame;a wheel rotatably mounted to the frame about a first axle defining a first horizontal axis and adapted to rollably engage a support surface;a lifter movable into and out of a retracted position and adapted to lift the wheel over a vertically disposed obstacle along the support surface, the lifter being defined by a generally C-shaped elongated member disengaged from the first axle and having first and second terminal ends facing opposite each other and interconnected by a curved intermediate body lying substantially ...