Seal for use in a volume displacement plethysmograph
US6475157B2 · kind B2 · utility
5Cited by
4References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 24, 2001 |
| Grant date | Nov 5, 2002 |
| Priority date | — |
| Expiry date | Mar 22, 2021 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/0806
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Disclosed is a neck seal for use in a volume displacement plethysmograph for investigating pulmonary function of infants. The neck seal includes particulate material entrapped in a space between two layers of flexible sheets. The two flexible sheets have aligned openings to allow an infant's neck to be located therein. The sheets are sealed together around the openings and along a closed figure extending around the openings, thereby forcing the space closed. The seal becomes rigid when a vacuum is applied to the space.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.