Orthodontic spring force adjustment and disconnectible connection
US4416625A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 26, 1980 |
| Grant date | Nov 22, 1983 |
| Priority date | — |
| Expiry date | Feb 26, 2000 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61C7/06
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An extraoral force-reaction device engageable 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 helical spring force-producing means. Snapback of the force-applying means is controlled 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 connection means which can be disconnected to interrupt the application to the intraoral means of force capable of moving such intraoral means. The force to be exerted by the spring force-producing means can be readily adjustable in predetermined increments, such as by engaging a spring end hook selectively with any anchor post of several posts arranged in a row lengthwise of the spring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.