Plunger rod head for activating needle safety device
US8298193B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 17, 2010 |
| Grant date | Oct 30, 2012 |
| Priority date | — |
| Expiry date | Feb 17, 2030 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/3264
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A passive needle safety device for protecting the needle of an injection syringe after medication has been delivered to a patient comprising a body that can hold a syringe, a telescoping guard fitting over the body, and a spring deployed between the guard and body such that the guard is urged in an extend configuration distally relative to the body, the improvement comprising, trigger fingers for holding the guard and body together in an un-extended configuration against the force of the spring, and a plunger rod with a plunger head which pushes against the trigger fingers, the head having an angled surface that provides a lateral component of force to the trigger fingers to displace them from the latched configuration to an unlatched configuration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.