Sequential stopper
US5713857A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 1996 |
| Grant date | Feb 3, 1998 |
| Priority date | — |
| Expiry date | Jun 28, 2016 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/31516
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A sequential stopper having structural features for facilitating substantially complete delivery of fluid held within a syringe barrel. The sequential stopper features a stopper body having a cylindrical side wall, proximal and distal ends, and one or more circumferentially-disposed sealing elements thereabout. One of the circumferentially-disposed sealing elements may be located adjacent the proximal end of the stopper body. An elongate hollow chamber is disposed within the stopper body parallel to the longitudinal axis of the stopper body. A pair of longitudinal sealing elements are disposed on the cylindrical side wall of the stopper body and are separated on the sidewall by a distance greater than a maximum width displayed by the elongate hollow chamber disposed within the stopper body. A recessed surface is disposed between the longitudinal sealing elements adjacent the proximal end of the stopper body. In one embodiment, the recessed surface is formed as a sloping surface extending obliquely from the proximal end of the stopper body towards the cylindrical side wall of the stopper body. A distally-directed conically-shaped projection is located at the distal end of the stoppe…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.