Portable electric water heating device for melting snow
United States Patent 3898429
A portable snow melter for manual operation includes a hollow hand grip of dielectric material having attached thereto an elongated wand carrying a discharge chamber. The grip is provided with a hose connection for supplying a flow of water to the interior of the grip. A manually operated valve is provided on the grip for selective control of the water flow. An electrical resistance wire helix is located in the grip for raising the temperature of the water as it flows through the grip. The wand conveys the heated water to a series of discharge nozzles in the discharge chamber wherefrom the heated water is ejected toward a snowy surface to melt the snow.
137/341, 222/146.5, 239/135, 392/474, 401/1
A47L13/00; E01H1/10; E01H5/10; H05B3/00; (IPC1-7): H05B3/82; F24H1/10; B05B1/24
Field of Search:
Attorney, Agent or Firm:
Popper & Bobis
What is claimed
1. A portable snow melter for manual operating comprising:
2. A portable snow melter for manual operation:
3. A portable snow melter for manual operation:
4. A portable snow melter for manual operation:
BACKGROUND OF INVENTION
1. Field of the Invention
This invention relates generally to snow melters and particularly to portable snow melters wherein an electrical heating coil is incorporated for heating flowing water and a nozzle assembly discharges the heated water onto a snowy surface.
2. Description of Prior Art
The removal of snow is generally accomplished by motorized scoops or by shoveling. There are often small snow falls which are not adequately or conveniently dealt with by cumbersome apparatus, and the use of snow shovels becomes heavy work.
SUMMARY OF INVENTION
It has been found that jets of heated water can be generated at the site to effectively melt snow falls. The present invention incorporating an electrical heater in a chamber to which water is supplied, and a discharge assembly at the end of a wand, can quickly discharge heater water to melt the snow on a surface, and clear it with a minimum of effort.
The discharge nozzles are on a wand which is manipulated by a handle containing an electrical heater. The heated water passes through the wand and out of the nozzles.
The apparatus is light-weight and easy to handle.
These objects and advantages, as well as other objects and advantages may be attained by the device shown by way of illustration in the drawings in which FIG. 1 is a perspective view of the portable snow melter.
FIG. 2 is a cross-sectional view taken on the line 2--2 in FIG. 1, looking in the direction of the arrows, showing the construction of the wand;
FIG. 3 is a vertical-sectional view of the water heating chamber; and
FIG. 4 is a vertical-section view of the discharge chamber and nozzles taken on the line 4--4 in FIG. 1 looking in the direction of the arrows.
DESCRIPTION OF PREFERRED EMBODIMENT
Referring now to the drawings in detail, the snow melter provides a generall tubular, dielectric, elongated housing 11. The housing is made of a material having a low co-efficient of thermal conduction such as ceramic material, although, other materials may be utilized.
The tubular housing 11 has an integral inwardly extending generally radial flange 12 at one end. The flange is provided with an integral tubular arrangement 13 defining a socket. A tubular gasket 14 is inserted in the enlargement 13 and functions as a liquid seal as hereinafter set forth.
The housing is provided with an external tubular grip made of a material having a low co-efficient of thermal conduction and a high co-efficient of friction. The outer surface of the grip 15 is serrated. The other end of the housing 11 is provided with an integral conical flange 16. The flange 16 is provided an integral tubular enlargement 17. The enlargement 17 has a slot 10 for a valve handle as will later appear.
A tubular insert 18 is positioned in the tubular enlargement 17. The tubular enlargement has a transverse annular bore 19 in which a generally cylindrical valve 20 is rotatably positioned. The valve has a handle 21 which is passed through the slot 10 and into threaded engagement with the valve 20 so that the valve passage 22 can be arranged in closed position, with respect to the passage in the insert 18, and moved to open position as shown in FIG. 3.
The end of the tubular enlargement 17 is provided with an external thread so that a water hose coupling can be applied thereto.
A double (folded) helix of electric resistance wire 24 is positioned in the housing and the insulation covered ends of the helix 24 are passed in spaced relationship to each other through a steel 8 and the passage 9 in the housing 11. The double helix is more efficient in heating water in the housing. These ends are connected to the switch 25 which in turn is connected to an electric power supply cable 26 at the end of which there is a plug 27 for establishing a connection to a power circuit. The opposite portions or halves of the helix 24 occupy opposite halves of the housing 11 and are spaced from each other.
At the opposite end of the housing 11, a wand 27 is attached to the housing. The wand 27 is a tubular body 28 which may be aluminum or a dielectric plastic material. The tube 28 is covered with a sheath or coating of material such as rubber, which has a low co-efficient of thermal conduction in order to retain the heat of water therein. The wand has an offset upper end 34, and its lower end terminates in a head assembly 30. The head assembly has a light-weight elongated discharge chamber which is provided with a plurality of discharge nozzles 33. The head assembly 30 and nozzles 33 are preferably made of aluminum.
The chamber 31 is covered with a sheath 32 of material having a low co-efficient of thermal conduction such as the material of the sheath 29 on the tube 28.
The snow melter is intended for use in the removal of snow by melting. A hose for supplying water is attached to the threaded end 23 by a coupling 36. The valve 21 is opened, allowing water from the hose 35 to enter the housing 11. The switch 25 is move to closed circuit position to energize the double helix 24. The double helix has a resistance sufficient to heat the wires and the water entering the housing and passing through the wand 27 out of the nozzles 33. The grip 15 and the ceramic housing 11 provide electrical and thermal insulation to the hand of the operator so that a person may maneuver the snow melter by directing its motion with the grip 15, so that the heated water discharged from the nozzles 33 melts the snow. The snow melter is operated and manipulated similar to the manner of operating a vacuum cleaner.