Delayed action assembly
First Claim
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1. A delayed release, ruminant dosage form comprising from 1 to 4 dosage unit release assemblies, at least one of which is a delayed action assembly which, in turn, comprises;
- a closed, non-biodegradable outer wall;
a dosage unit of an active ingredient in dispersible form within said wall;
a water-tight cover or plug which is capable of being displaced by internal gas pressure and which extends through said outer wall;
weight means sufficient to retain said delayed action assembly in the rumen and arranged within said dosage form, andan internally disposed electrical circuit means which, in turn, comprises, interconnected;
a source of current;
an internally disposed chemical squib for generating internal gas pressure, within the assembly,sufficient to remove said removable cover or plug;
means for timing and activating said chemical squib, andmeans for activating said circuit.
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Abstract
A device for effecting the delayed release of an active ingredient comprises a container and, within, a dispersible unit of ingredient, a removable closure and a electrical control circuit for removal of said closure at a designated time to release the active ingredient. Several assemblies are combined to control the administration of veterinary medicaments to ruminant animals as a specific application of the invention.
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Citations
8 Claims
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1. A delayed release, ruminant dosage form comprising from 1 to 4 dosage unit release assemblies, at least one of which is a delayed action assembly which, in turn, comprises;
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a closed, non-biodegradable outer wall; a dosage unit of an active ingredient in dispersible form within said wall; a water-tight cover or plug which is capable of being displaced by internal gas pressure and which extends through said outer wall; weight means sufficient to retain said delayed action assembly in the rumen and arranged within said dosage form, and an internally disposed electrical circuit means which, in turn, comprises, interconnected; a source of current; an internally disposed chemical squib for generating internal gas pressure, within the assembly, sufficient to remove said removable cover or plug;
means for timing and activating said chemical squib, andmeans for activating said circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification