Surgery lamp
US5375049A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 21, 1992 |
| Grant date | Dec 20, 1994 |
| Priority date | — |
| Expiry date | Dec 21, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S362/804
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
In a surgery lamp with at least one arm which is divided by several uniaxial joints consisting of several parts, a lamp head being fastened to its one end, and its other end is held stationary, the arm has a spring counterbalance for counterbalancing the lamp head when it is moved; the locking of the joints is electrically variable, and the release for adjustment followed by locking is performed through a switch. The joints are constructed with a sealed channel disposed in one joint member concentrically with the joint axis filled with an electroviscous fluid into which projections of the other joint member reach. The annular channel and the members form a pair of poles for the application of a voltage to the electroviscous fluid, whereby the joint members can be rendered relatively immovable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.