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|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||16/303 ; 16/330|
|발명자 / 주소|
|인용정보||피인용 횟수 : 17 인용 특허 : 0|
A hinge includes a housing, a barrel rotatably engaged in the housing, a shaft extended in the housing and the barrel, two rings engaged on the shaft and movable along the shaft, springs engaged on the shaft for biasing the rings toward each other, one of the rings has a pair of helical surfaces, and the other ring has two projections for slidably engaging with the helical surfaces. The rings are separated from each other to compress the springs when the door is opened, and the rings are forced toward each other by the springs.
A hinge comprising a housing having a notch formed in a middle portion thereof, a first ear extended from said housing, a barrel engaged in said notch of said housing, a second ear extended from said barrel, a shaft extended in said housing and said barrel and including a first end fixed to said housing, a sleeve secured on said first end of said housing, a wheel secured on a second end of said shaft, a first ring and a second ring engaged on said shaft and movable along said shaft, said first ring slidably coupled to said barrel and rotated in concert w...