Orthodontic appliance force equalizer |
|||||||
| 申请号 | US39112973 | 申请日 | 1973-08-24 | 公开(公告)号 | US3918159A | 公开(公告)日 | 1975-11-11 |
| 申请人 | ANDREWS LAWRENCE F; | 发明人 | ANDREWS LAWRENCE F; | ||||
| 摘要 | An orthodontic appliance force equalizer for equalizing the tension on an orthodontic appliance such as a conventional face bow in which a coil spring reel is carried within a housing mounted on a headband and within which the coil spring acts to maintain an adjustable but constant tension. A cord such as a nylon cord is wrapped around the coil spring reel from opposite directions and is in turn attached to each end of the orthodontic face bow with the spring being partially coiled to exert a predetermined tension or force on the face bow. The reel is rotatably mounted to the case for paying out and taking up the cord as dictated by movement of the patient''s head. The entire assembly is carried in the manner of a headband or neckband on the back of the patient''s head. | ||||||
| 权利要求 | 1. An orthodontic appliance force equilizer for equalizing the tension on an orthodontic appliance such as a conventional face bow comprising: a housing; a reel assembly rotatably mounted within said housing; first and second lines coiled on said reel assembly, said first and second lines adapted for coupling to an orthodontic appliance; a spindle carried by said housing concentric with said reel assembly; a coil spring disposed within said reel assembly, said coil spring having an inner end coupled to said spindle and an outer end attached to said reel assembly; and said reel assembly consists of first and second reels with said first and second lines coiled thereon, respectively, said first and second lines being coiled in opposite directions; said spindle being fixedly attached to one of said first and second reels and rotatably coupled to said housing; and said outside end of said spring being attached to another of said fiRst and second reels. |
||||||
| 说明书全文 | |||||||
QQ群二维码
意见反馈
意见反馈