Multi-beveled point needle and syringe having a multi-beveled point needle
US7320683B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 5, 2003 |
| Grant date | Jan 22, 2008 |
| Priority date | — |
| Expiry date | Jul 6, 2025 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/195
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A syringe assembly including a needle cannula having a five-beveled point and a needle shield formed of a styrene block poly(ethylene/butylene) thermoplastic elastomer which significantly reduces needle penetration force and may reduce the cycle time for gas sterilization. The multi-beveled needle cannula point includes a primary bevel, a pair of tip bevels and a pair of middle bevels each intermediate the primary bevel and a respective tip bevel, wherein the angles of rotation of the primary bevel and the intermediate bevels are substantially equal resulting in reduced heights of intercepts between the bevels, therby reducing needle penetration force. The needle shield maintains the sharpness of the needle cannula during application, sterilization and removal of the shield and it is believed that the needle shield will also reduce the cycle time of gas sterilization as compared to rubber needle shields and vulcanizate thermoplastic elastomers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.