Articulated headrest mechanism
US4863218A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 12, 1989 |
| Grant date | Sep 5, 1989 |
| Priority date | — |
| Expiry date | Jan 12, 2009 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61G15/125
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A headrest tilting mechanism includes a bar having first and second ends, with a headrest mounting portion proximate the first end and a substantially straight portion proximate the second end. A support means includes a curved cam surface and a pin having ends rotatably coupled to the support means. The pin has a cross-slot therethrough and a portion of the bar which is intermediate the first and second ends passes through the cross-slot. A cam following means attached to the bar proximate the second end causes the second end to follow the cam surface of the support means. With this arrangement, the curved cam surface is not located at the very top of the chair back and therefore the head of the patient can be significantly closer to the lap of the dentist than prior art arrangements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.