Wedge seal for a tracheotomy tube
US4009720A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 14, 1975 |
| Grant date | Mar 1, 1977 |
| Priority date | — |
| Expiry date | Aug 14, 1995 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M16/0497
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A wedge-like seal for use with a tracheotomy tube having an inner cannula and an outer cannula. The seal is integrally formed within the outer end of the inner cannula to provide a tight seal engagement between the inner cannula and the outer cannula as well as between the coupling connector and the inner cannula. Incorporated in the seal is a circular sealing ridge from which depend two frusto-conical shaped sealing surfaces extending in opposite directions from the central ridge. The seal minimizes the force necessary to establish as well as to disengage the sealing contact between the respective tracheotomy tube parts, eliminating possible discomfort to the patient.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.