Equipment for disclosing pressure
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United States of America Patent
Stats
-
Sep 13, 2005
Grant Date -
Aug 21, 2003
app pub date -
Apr 12, 2001
filing date -
Apr 13, 2000
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The invention relates to equipment such as for detecting and providing visual confirmation of pressure thereon, e.g. from an impact, which comprises an article having a sandwich construction with a pressure-disclosing layer (3) comprising a liquid crystal, thermochromic material, and a temperature differential layer (5), separated by a layer (4) providing a compressible mechanical shield between the pressure-disclosing layer and the temperature-differential layer. Material according to the invention can be employed to indicate the boundaries of a tennis court, or sports playing areas, or as a golf training aid, among other uses.
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