|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||280/047.29; 280/047.28; 280/030; 280/047.18; 280/047.2|
|발명자 / 주소|
|인용정보||피인용 횟수 : 12 인용 특허 : 57|
A hand truck includes a main frame, a movable frame pivotally connected with the main frame, a wheel set, and a handle able to be connected with the main frame with its height adjustable or to be connected with a handle receiving short tube fixed upright on the main frame in case of transforming the two wheeled hand tuck, two wheel supporters fixed under the main frame for additionally combining two independent wheels for transforming the two wheeled hand truck into a four wheeled one.
1. A hand truck comprising:a main frame consisting of two vertical side rods, two intermediate support rods positioned in parallel to and between said vertical side rods, an upper side rod combined with said two side rods and said two support rods, and an L-shaped elongate plate welded tightly with a lower end of said two vertical side rods to form a lower side of said main frame, said two vertical side rods respectively provided with a position hole near its upper end;a wheel set consisting of two wheels rotatably combined with two ends of an axle and w...