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US 5,685,256 AGranted
Set pressure sensing and verifying device
AssigneeGas Research Institute
InventorThomas Charles Green
Life of this patent
Estimating the term…
Abstract
A device for detecting soil compaction density comprising at least one shell material forming an enclosure, a failure plane disposed within the shell material which causes the shell material to fail at a preset static or dynamic pressure, and a detector, such as an odoriferous chemical enclosed within the enclosure which is released upon failure of the shell material, thereby indicating that the preset static or dynamic pressure has been achieved.
Claims6
A device for detecting soil compaction density comprising:
- at least one shell material forming an enclosure;
- said at least one shell material including failure means within the shell material for causing failure of said shell material when external pressure on the enclosure exceeds one of a preset static pressure and a preset dynamic pressure;
- and
- detector means for permitting detection of said failure of said at least one shell material, said detector means disposed within said enclosure.
1 more element
Dependencies are inferred from the claim text.