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US 4,732,850 AGranted
Frangible container with rupturing device
AssigneeE. R. Squibb & Sons, Inc.
InventorsJames R. Brown, Steven T. Buglino
Life of this patent
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Abstract
A biological indicator is made of a vial which contains a "spore dot", a nutrient solution in a frangible ampoule, and means for positioning the spore dot and for breaking the ampoule to release the nutrient solution when the cap of the vial is fully pressed on. The nutrient solution typically contains a pH indicator to determine whether all active spores on the strip were killed by a sterilization process which takes place prior to breaking the ampoule.
Claims8
A frangible container and rupturing device comprising:
- (a) a substantially non-deformable tubular vial;
- (b) a sealed, frangible container within said tubular vial, said tubular vial having a cap which presses onto said sealed, frangible container, said cap including means for centering the top of said container within said vial;
- and
- (c) fulcrum means attached to said container near the end of said container adjacent to said cap of said vial, whereby when said cap is depressed said means for centering said container engages said container and causes said fulcrum means to provide a lateral force against the side of said container thereby providing sufficient pressure to rupture said container when said cap fully engages said vial.
1 more element
Dependencies are inferred from the claim text.