Self-sealing injection reservoir
US4738657A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 1985 |
| Grant date | Apr 19, 1988 |
| Priority date | — |
| Expiry date | Sep 30, 2005 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M39/0208
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An injection reservoir or button is disclosed which is adapted for implantation beneath the skin of human and animal patients in conjunction with tissue expanders and drug delivery devices. The injection reservoir includes a base and an exterior wall which define a chamber or liquid reservoir. A suitable duct connects the chamber with an expandable bag of the tissue expander. An elastic rubber member is affixed within the interior of the chamber in a configuration wherein its side abutting the chamber is in compression, thereby rendering the member self-sealing to punctures by a hypodermic needle. A metal guard plate is included within the interior of the chamber to guard the base against accidental puncture by an over-extended hypodermic needle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.