Cannula assembly for syringe
US4981472A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 1989 |
| Grant date | Jan 1, 1991 |
| Priority date | — |
| Expiry date | Nov 20, 2009 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/3201
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
This cannula assembly for injecting medicinal fluid into an animal's teat has a first tapered cannula formed with a circumferential bead at its wider end. A flexible jacket encloses the cannula and has another bead detachably engaging the bead on the cannula. A tapered second cannula extends forwardly from the jacket. This cannula is shorter than the first cannula. A flexible cap has an internal bead which detachably engages a corresponding bead at the sider end of the second cannula. This assembly provides the user with a choice of cannulas of two different sizes in treating a teat. In another form of the invention, a second flexible jacket has a bead which detachably engages a bead on the second cannula. A third cannula extends forwardly from the second jacket. The flexible cap detachably engages a bead on the third cannula, so that the user has a choice of cannulas of three different lengths in treating a teat.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.