Electric resistance heating devices – Heating devices – Vaporizer
Reexamination Certificate
2000-09-15
2001-11-13
Walberg, Teresa (Department: 3742)
Electric resistance heating devices
Heating devices
Vaporizer
C392S455000, C392S501000, C392S489000
Reexamination Certificate
active
06317559
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an apparatus for sealing the end portion of a hot-water tube in which electric heating wires are inserted, characterized in that it enables electric heating wires in hot-water tube to extend through to the outside without the leakage of water from the hot-water tube.
2. Description of the Prior Art
In conventional boilers, there is no fear for leakage of water in heating a room by supplying heated water to a room-heating hot-water tube, because the hot-water tube is tube-connected with-the boiler.
According to a conventional method, in inserting an electric heating, wire through the entire length of a room-heating hot-water tube and connecting both ends of said wire to a power source by extending said wire out through both ends of the hot-water tube, each end of the hot-water tube was closed by a plug and a hole through which the wire passes was sealed off with an adhesive agent to prevent leakage of water. (Refer to U.S. Pat. No. 5,832,179 by Kim et al titled FLOOR HEATER WITH WATER TUBE AND THIN COPPER ELECTRIC HEATING ELEMENT INSERTED THEREIN)
This conventional method of sealing the ends of a hot-water tube with an adhesive agent offered a problem because the adhesive agent fell off when the inner pressure inside the hot-water tube rose, when the electric heating wire is pulled or moved sideways, resulting in a leakage of water through the hole through which the wire is placed.
SUMMARY OF THE INVENTION
In the present invention, in order to solve the above problem, a plug is screw-connected to each end of the room-heating hot-water tube, a silicone cock of an elastic material, through which coated electric heating wires are placed from the hot-water tube to the outside of the tube, is inserted into the cylinder-like concave of the plug. Then a crown nut is screwed in onto the exterior of the plug, pressing down the cock. This pressing down the cock results in tight sealing of the clearance between the plug and the cock and of the clearance in the holes through which the electric heating wires pass, preventing leakage of water and tottering of the wire in the cock. This promotes safe installation of a room-heating apparatus and expediency in room-heating.
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Creighton Wray James
Dahbour Fadi H.
Narasimhan Meera P.
Walberg Teresa
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