Delivery device
US4883484A · kind A · utility
Inventors
Key dates
| Filing date | Dec 2, 1987 |
| Grant date | Nov 28, 1989 |
| Priority date | — |
| Expiry date | Dec 2, 2007 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M31/002
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
An intraruminal device has hinged wings (6) which lie along the body of the device during administration to the animal but which are urged outwardly by a spring (14) acting on a piston (12) shortly thereafter. The wings (6) are locked in the extended position: the piston (12) prevents them returning to the starting position, and T-bars (10) prevent them continuing to an "arms-over-head" position. The locking means may comprise a latch. The spring (14) may be replaced by a water-swellable polymer which expands on contact with rumen fluids. The device is used to administer drugs or minerals to the rumen of a ruminant over a prolonged period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.