|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||016/032; 016/044; 016/105|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 5 인용 특허 : 5|
A caster includes a fixing portion installed on a bottom surface of an object, a wheel portion which is installed to be elevated into a flange portion and has a moving wheel provided on a bottom surface of the wheel portion, and an elevating portion to control the wheel portion to elevate into the flange portion. The wheel portion descends from the fixing portion to move the object and elevates into the fixing portion to fixedly dispose the object in a position. Therefore, a height of the caster is controlled to be high when the heavy object is being mov...
What is claimed is: 1. A caster used with an object comprising: a fixing portion installed on a bottom surface of an object; a wheel portion which is installed to be elevated into the fixing portion and has a moving wheel provided on a bottom surface of the wheel portion; an elevating portion having a rotating member disposed on a portion of the elevating portion to be rotatable with respect to the elevating portion and a guide plate contacting a rolling member of the elevating portion to control the wheel portion to be elevated into the fixing portion ...