Safety needle syringe braking system
US7972301B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 27, 2007 |
| Grant date | Jul 5, 2011 |
| Priority date | — |
| Expiry date | May 15, 2028 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/3242
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A braking mechanism for a retractable safety syringe is disclosed herein. In a first embodiment, the braking mechanism is disposed about the distal end of a piston. The braking mechanism may comprise a friction material about a post attached to a piston. The friction material is displaced from a seat to a landing when the piston is traversed to a fully extended position to disengage the braking mechanism. In a second embodiment, the braking mechanism is disposed at a proximal end of a syringe body. The braking mechanism has a friction member which engages an outer surface of a rigid shaft of a plunger. The friction member is selectively pivotable to disengage the braking mechanism.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.