Syringe assembly with contained pop-out elastic plug seal
US3967759A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 18, 1974 |
| Grant date | Jul 6, 1976 |
| Priority date | — |
| Expiry date | Mar 18, 1994 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/3139
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A prefillable or prefilled syringe having a liquid-containment glass tube body section with thermoplastic resin finger-grip sleeve and noseforming sleeve fit thereon in an interference fit, and with the ends of the glass tube being sealed after filling and preferably prior to assembly of one or both the finger-grip sleeve and the nose-forming sleeve, and a method of assembly thereof, the finger-grip sleeve and the nose-forming sleeve being cam-stretched onto and frictionally retained on and along a glass tube, in the form of a section of die-formed glass tubing. Increase in latitude of operable interference fit and stretch is effected by assembling the finger-grip sleeve and the noseforming sleeve in a heated condition, without requiring heating of the glass tube and its prefilled contents. A preferred embodiment utilizes a pop-out valve plug seal in the nose end of the glass tube, with a plunger piston at the opposite end, for sealed prefilled containment of a liquid drug or other chemical agent in the glass tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.