Laryngoscope having removable blade assembly containing lamp and light conductor
US5355870A · kind A · utility
Inventor
Key dates
| Filing date | Jul 28, 1992 |
| Grant date | Oct 18, 1994 |
| Priority date | — |
| Expiry date | Jul 28, 2012 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B1/0669
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
This laryngoscope has a cylindrical metal casing serving as a handle. An insulated, plastic blade is rotatably mounted near one end thereof on the casing between angularly spaced operating and nonoperating positions. A blade projects from the blade assembly to depress a patient's tongue. Batteries in the casing apply positive electric polarity to an electrode on the casing and negative electric polarity to the casing. A lensed end lamp having a bulb, base and end terminal is mounted on the blade assembly with the terminal in contact with a leaf spring which in turn contacts the electrode when the assembly is rotated to an operating position. A flange on the casing contacts the lamp base to complete a power supply circuit when the blade assembly is rotated to the operating position for lighting the lamp bulb. A light conductive rod extends from the lamp bulb to project light into the patient's larynix while the blade depresses the patient's tongue. A hook on the blade assembly enables easy mounting of the blade assembly on the casing and easy removal therefrom.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.