Delivery device
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United States of America Patent
Stats
-
Nov 28, 1989
Grant Date -
N/A
app pub date -
Dec 2, 1987
filing date -
Jun 17, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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