Replaceable saliva barrier for intra-oral larynx
US4539698A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 1, 1983 |
| Grant date | Sep 3, 1985 |
| Priority date | — |
| Expiry date | Nov 1, 2003 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2/20
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An intra-oral artificial larynx is provided including a signal generator and a speaker mounted on a prosthesis for mounting the larynx within the intra-oral cavity. A horn is provided having an input opening coupled to the speaker for acoustically amplifying the output of the speaker, the horn also having an output opening. A saliva barrier is removably mounted to the output opening of the horn for precluding penetration of saliva into the horn, the barrier having a first end which is telescopically received within the output opening of the horn and the second end having a mouth formed on a bias to the longitudinal axis of the mounting and a microporous membrane sealing the mouth. The mouth of the mounting has an elliptical shape which has been found tends to increase speaker volume. Moreover, the telescopic mating of the mounting and the horn provides a saliva barrier which is easily replaceable by the user.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.