Infusion needle
US4627841A · kind A · utility
Inventor
Key dates
| Filing date | Feb 18, 1986 |
| Grant date | Dec 9, 1986 |
| Priority date | — |
| Expiry date | Feb 18, 2006 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/3212
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A venipunture or similar infusion device comprises a blunt-ended catheter telescopically received in a sharp-tipped hollow needle, the catheter and needle being connected respectively to associated hubs which are spring-biased toward each other. In passive condition, with the hubs substantially in contact, the blunt end of the catheter protrudes from the sharp tip of the needle. For insertion of the device into a vein or other tissue, a wedge attached to one of the hubs is manipulated to wedge the hubs, and the catheter and needle attached thereto, a sufficient distance apart to cause the sharp tip of the needle to protrude beyond the blunt end of the catheter. After insertion, release of the wedge permits the spring to return the hubs to passive condition, with the blunt end of the catheter protruding from the sharp tip of the needle. Thus, during the indwelling period, the sharp tip of the needle is effectively covered and can do no damage to a vein or other tissue in which it is inserted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.