US2020173685A1PendingUtilityA1

Water heating system for faucets

55
Individually held — no corporate assignee on recordPriority: Oct 31, 2018Filed: Oct 31, 2019Published: Jun 4, 2020
Est. expiryOct 31, 2038(~12.3 yrs left)· nominal 20-yr term from priority
Inventors:Darryl L. SnyderBob Sebald
F24H 1/102F24D 2220/0235F24H 1/162F24D 2220/0264F24D 17/0089F24H 15/174F24H 15/37F24H 15/212F24D 19/1051
55
PatentIndex Score
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Claims

Abstract

An electric water heater is disposed close to a faucet to readily provide heated water to the faucet. This heater provides heated water without the wait required to obtain hot water from the main, remotely-located, hot water heater such as a hot water tank. The electric hot water heater includes a heater tube disposed in contact with an electric resistance heater. The electric resistance heater does not directly contact the water in the heater tube. The electric resistance heater heats the sidewall of the heater tube which, in turn, heats the water in the heater tube. Two layers of insulation are disposed over the electric resistance heater. The heater tube is placed in line with the regular hot water supply pipe.

Claims

exact text as granted — not AI-modified
1 . A system for delivering heated water to a faucet, the system comprising:
 a hot water supply pipe adapted to deliver water from a water heater tank;   a water heater having an inlet connected to the hot water supply pipe and an outlet in fluid communication with a faucet;   the water heater having a heater tube that receives the water from the hot water supply pipe;   an electric resistance heat wire wrapped around the heater tube; and   the heater tube having an internal diameter larger than an internal diameter of the hot water supply pipe.   
     
     
         2 . The system of  claim 1 , wherein the electric resistance heat wire is disposed on the outside of the heater tube and does not contact water in the heater tube. 
     
     
         3 . The system of  claim 2 , further comprising a thin layer of metal disposed over the electric resistance heat wire. 
     
     
         4 . The system of  claim 3 , further comprising insulation disposed over the thin layer of metal. 
     
     
         5 . The system of  claim 4 , wherein the insulation is fiber-based. 
     
     
         6 . The system of  claim 2 , further comprising a thin layer of metal disposed between the electric resistance heat wire and the outside of the heater tube. 
     
     
         7 . The system of  claim 1 , wherein further comprising a throttle disposed between the faucet and the heater tube. 
     
     
         8 . The system of  claim 1 , wherein the heater tube has an internal diameter that is at least twice the internal diameter of the hot water supply pipe. 
     
     
         9 . The system of  claim 1 , wherein the heater tube has an internal diameter that is three to six times as large as the internal diameter of the hot water supply pipe. 
     
     
         10 . The system of  claim 9 , wherein the heater tube has a length of eight to twenty-four inches. 
     
     
         11 . The system of  claim 10 , wherein the heater tube is made from chlorinated polyvinyl chloride pipe. 
     
     
         12 . The system of  claim 11 , wherein the pipe is two inch pipe. 
     
     
         13 . The system of  claim 1 , wherein the electric resistance heat wire is powered from a 100 V power supply. 
     
     
         14 . The system of  claim 13 , wherein the electric resistance heat wire includes a plug.

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