Delivery device

Details Delivery device Delivery device

1987-12-02

1989-11-28

Pellegrino, Stephen C.

Surgery

Controlled release therapeutic device or system

Implanted dynamic device or system

604 57, 424438, A61M 3100

Patent

active

048834840

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.

REFERENCES:
patent: 3844285 (1974-10-01), Laby
patent: 3993058 (1976-11-01), Hoff
patent: 4326522 (1982-04-01), Guerrero et al.
patent: 4416659 (1983-11-01), Simpson et al.
patent: 4585451 (1986-04-01), Millar
patent: 4623330 (1986-11-01), Laby et al.
patent: 4623345 (1986-11-01), Laby
patent: 4687480 (1987-08-01), Laby et al.

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