Dental chair headrest locking device
US4111483A · kind A · utility
9Cited by
4References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 24, 1977 |
| Grant date | Sep 5, 1978 |
| Priority date | — |
| Expiry date | Jun 24, 1997 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47C7/38
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A headrest mounted to the top of a dental chair backrest can readily be positioned by means of a headrest bar engaging a locking device affixed to the chair backrest. The locking device comprises a pair of resilient rubber surfaces which grip or contact the headrest bar to positively lock the headrest in position. By merely pushing the headrest to a more vertical position, the gripping or contacting of the rubber surfaces to the headrest bar is substantially eliminated to thus permit positioning of the headrest. Release of headrest will return it once again to a locked position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.