"""Hinge with movement limitation"""
US5997493A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 16, 1997 |
| Grant date | Dec 7, 1999 |
| Priority date | — |
| Expiry date | Sep 16, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2005/016
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A uniaxial orthopaedic hinge (1000, 2000) has a substantially circular body forming a recessed housing (1022, 2022). The upper surface of the housing (1022, 2022) is furnished with a concentric arcuate circular slot (1038, 2038) disposed inwardly from the periphery. The inner surface (2040) is provided with equally spaced radial teeth (1044, 2044). A back plate (1006, 2006) has an extension into a stub arm (1004, 2004) for attaching to the arm of an orthosis and is fixed to the recessed housing (1022, 2022). A locking plate (1008, 2008) also has an extension into a stub arm (1002, 2002) and is disposed in a parallel manner between the recessed housing (1022, 2022) and the back plate (1006, 2006). Adjustable locking means are in the form of quadrants (1050, 1052, 2050, 2052) each having a pusher (1066, 1068, 2066, 2068) which extends through the arcuate slot (1038, 2038) in the recessed housing (1022, 2022) and toothed locking faces (1042, 2042) on either side of a base portion (1054, 1056, 2054, 2056), the teeth being adapted so as to engage with those on the inner aspect (2040) of the recessed housing (1022, 2022). The quadrants (1050, 1052, 2050, 2052) are each provided with a co…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.