Rotary lock for needle sheaths
US5279584A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 1993 |
| Grant date | Jan 18, 1994 |
| Priority date | — |
| Expiry date | Apr 30, 2013 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/3247
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
This specification discloses a lock for a latch on a hypodermic syringe which has a reciprocating sheath that is normally latched to cover the needle to protect persons handling the syringe. The latch is operated to withdraw the sheath to expose the needle for use. The latch shell 22 is moved longitudinally to actuate latch fingers 26. After use it is desirable to lock the latch to prevent reuse of the syringe. A user manually rotates the latch shell 20 to lock the latch in the position where the sheath is over the needle. Rotary motion causes the lugs 26 to ride up the ramps 28 and then drop into the recesses 29. Thereafter, there can be no rotation and no reciprocation of the latch. The lugs prevent rotary motion as well as reciprocating motion of the latch shell 22.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.