Ingestible device for the release of substances at distinct locations in alimentary canal
US6884239B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 20, 2002 |
| Grant date | Apr 26, 2005 |
| Priority date | — |
| Expiry date | Oct 18, 2023 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61P1/00
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The field of the invention is site-specific drug delivery capsules (SSDC's). The disclosure relates to a closure member (14) for a substance reservoir (12) of an SSDC (10). The SSDC (10) includes a retainer that provides a non-linear force resisting opening of the closure member (14). The non-linear force ensures that the closure member (14) unseals the reservoir (12) only when an opening force exceeds a maximal value of the resisting force, thereby preventing premature or accidental emptying of the reservoir (12). The preferred means of providing the resistive force is a rolling, elastomeric o-ring (64) that additionally seals the closure member (14) into an aperture (13).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.