Self sealing subcutaneous infusion and withdrawal device
US4802885A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 17, 1986 |
| Grant date | Feb 7, 1989 |
| Priority date | — |
| Expiry date | Jun 17, 2006 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2039/0226
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The self-sealing subcutaneous infusion and withdrawal device or septum includes a cup-shaped needle stop member that defines a fluid chamber having a fluid transfer opening. A jacket envelops the needle stop member and includes an integrally formed delivery tube that aligns with the fluid transfer opening in the needle stop member. The fluid chamber of the needle stop member is sealed by a needle penetrable sealing member that is forced against a wall of the needle stop member by a clamping member to provide a mechanical leak-tight seal. The seal member has opposite convex surfaces which cooperate with the clamping member to impose a compression force upon a needle that penetrates the seal member during the fluid infusion and fluid withdrawal processes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.