A - Human Necessities – 61 – C
Patent
A - Human Necessities
61
C
83/1
A61C 7/00 (2006.01)
Patent
CA 1115565
Applicant: Northwest Orthodontics, Inc. Title: Extraoral Force-Applying Orthodontic Appliance ABSTRACT An extraoral force-reaction device engage- able with the wearer's head and/or neck, such as a headcap or a neckband, is connected to an intraoral force-applying device, such as molar bands, by of the normal range of movement of the force-applying elements and such snapback is controlled in response extraoral force-reaction means away from each other beyond a predetermined maximum limit, or in response to stressing of the force-producing means beyond a predetermined maximum degree of force exerted by the force-producing means. Snapback control is effected by disconnectible means interrupting the application of primary force to the intraoral means and reaction force to the head or neck engageable means. The force to be exerted by the spring force-producing means can be readily adjustable in predetermined increments, such as by a linear ratchet device. Also, various components of the extraoral force-reaction device can be assembled and adjusted as to length by connection of separable connections, which may include linear ratchet means.
302403
Northwest Orthodontics Inc.
Smart & Biggar
LandOfFree
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