Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Robert J. Dillon0
Date of Patent
June 2, 2009
0Patent Application Number
114871700
Date Filed
July 17, 2006
0Patent Citations Received
Patent Primary Examiner
Patent abstract
A sight glass apparatus providing visual information concerning the presence of absence of liquid in a refrigeration system has a sight glass with a pair of clear glass bodies secure to a housing having a chamber for the liquid. The bodies have angled prismatic surfaces. One body includes a convex lenses that directs light to a colored member that reflects a colored toroid image when the chamber is full of liquid. A moisture sensing element is mounted on the sight glass to identify the presence of water in refrigeration and air conditioning systems.
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