|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||301/111 ; 301/1 ; 280/528 ; 280/431|
|발명자 / 주소|
|인용정보||피인용 횟수 : 11 인용 특허 : 0|
A folding hand truck auxiliary wheel structure comprising an U-shaped auxiliary wheel frame adjustably secured to the wheel frame of a folding hand truck by a stop plate and a U-shaped spring wire to hold a pair of auxiliary wheels, wherein the U-shaped auxiliary wheel frame has a plurality of pairs of pin holes symmetrically made on the two linked, elongated rods thereof along longitudinal direction; the stop plate has two curved portions spaced from each other for fastening the two linked, elongated rods of the U-shaped auxiliary wheel frame which have...
For a folding hand truck of the type having a wheel frame with wheels controlled by a handle to support a shelf for carrying things, an auxiliary wheel structure comprising: a stop plate attached to the wheel frame of a folding hand truck at the back, having two spaced, curved portions respectively projecting outwards relative to said wheel frame and defining therein a retaining hole each disposed in a vertical direction, said two spaced, curved portions having each a pin hole at an inner side relative to each other; an U-shaped auxiliary wheel frame com...