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US 5,332,887 AGranted
Electric thermos bottle capable of automatic water release and water cutoff
OwnerYuan Shiaw-Shinginventor
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OwnerYuan Shiaw-Shinginventor
Estimating the term…
An electric thermos bottle capable of automatic water release/cutoff which has an automatic water release/cutoff power switch turned on by the weight of a cup placed thereon. When the power switch is on, it actuates an electric air pump inside the top head of the thermos bottle to produce compressed air which passes an air communicating pipe and enters the sealed thermos bottle. At this point, the air pressure in the thermos bottle suddenly increases and therefore, forces water reserved in the thermos bottle to automaticaly release from a blow off pipe before flowing into the cup below a water exit. When water in the cup reaches a predetermined level, the water completes an override circuit which includes conductive elements in the cup and the metal interior of the thermos, in order to disconnect the air pump and automatically discontinue the release of water. An air valve is located above the air communicating pipe and will automatically open when the release of water is discontinued to thereby form a steam passage which prevents water reserved in the thermos bottle from overflowing.
An electric thermos bottle capable of automatic water release and cutoff, comprising:
An electric thermos bottle capable of automatic water release and cutoff as claimed in claim 7, wherein a reset switch is provided in the cutoff circuit between the voltage supply and said relay such that, in the event a thin layer of moisture forms on an inner wall of said cup therefore completes a circuit with the base electrode of the first transistor, causing water cutoff before said high level mark is reached by said water poured into said cup, said reset switch causes a positive voltage on a collector electrode of the second transistor to discharge, thereby causing said relay to open and said pouring to continue until said high water mark is reached.
An electric thermos bottle capable of automatic water release and cutoff as claimed in claim 7, wherein a safety switch is provided on said thermos bottle by providing a double-pole switch on said power supply circuit of said automatic water release/cutoff power switch such that when said safety switch is turned off, said automatic water release/cutoff power switch is also disconnected.
Dependencies are inferred from the claim text.