Adjustable tracheostoma valve
US5059208A · kind A · utility
81Cited by
3References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 4, 1991 |
| Grant date | Oct 22, 1991 |
| Priority date | — |
| Expiry date | Feb 4, 2011 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2/20
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A patient adjustable valve to control the flow of air through an opening surgically created in the neck of the patient. Two concentrically rotatable tubular parts form the outer body and the inner annular sealing surface of the valve. A disk shaped diaphragm proximate the sealing surface allows the free passage of air to the trachea for lower breathing pressures but flaps closed for the higher pressures that precede speech. The normally curled diaphragm is pushed to a flatter, easier to close, position by a cam on the inside of the outer body when the body is rotated relative to the sealing surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.