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|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||49/386 ; 16/75|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 12 인용 특허 : 0|
A self-closing door device includes a torsion bar which is connected at its ends between the hinged side of the door and the door jamb. The torsion bar is arranged to twist about as well as bend along its longitudinal axis and in a manner which tends to decelerate the door as the door approaches its closed position.
A closure device for a door which is hingedly mounted to a door jamb comprising: a torsion bar connected at one end at a first location to the door jamb and at its other end, at a second location, to an adjacent portion of the door; the distance between said first and second locations, when the door is closed, being less than the length of the torsion bar whereby said bar will be attached in a manner such that when the door is open the bar will extend along a straight line from said first to said second locations, whereby when the door swings toward its ...