Abstract Cylindrical water tanks, such as used for water softeners, inherently corrode at the bottom and herein is taught that the tanks are repaired by removing the bottom dish with the use of a novel tool that moves around the tank and bears there against with a substantially uniform force thereby readily following the tank''s contour, by sandblasting the interior for cleaning, by installing a new bottom dish to the cylindrical body with the use of a novel tool that automatically stops further penetration of the dish into the tank when a predetermined overall height of the tank is obtained, by welding the bottom dish to the body, by coating the interior with a non-corrosive plastic with the use of a novel spray gun apparatus that radially sprays the liquid plastic onto the inner walls of the tank as the spray nozzle moves axially therein and then the spray nozzle is adjusted to cause the spray to form an upward diverging cone to coat the underside of the top cover, and finally by allowing the plastic to harden.
An apparatus for removing a concave dish welded to one end of a hollow, cylindrical body, which has a bar disposed and fixed parallelly spaced therefrom; said apparatus comprising: a frame; a pair of spaced rollers mounted on said frame and disposed to rotate about a respective parallel, horizontal axis so that said body is capable of being rotatably supported thereon in the horizontal position; a clutch means for engaging and supporting the end of said body opposite said dish, to rotate said body about another horizontal axis; a beam disposed to pivot about another horizontal axis; a motor and grinding wheel mounted on said beam so that said grinding wheel moves down towards said body as said beam pivots; a counter-weight mounted on said beam so that said grinding wheel is lifted off said body by gravity; a clip capable of being removably fastened to said bar; and a tension spring disposed between said clutch means and said clip to dampen vibrations.
Claim 2
Independent Claim
163 words
An apparatus for removing a concave dish welded to one end of a hollow, cylindrical body, which has a bar disposed and fixed parallelly spaced therefrom; said apparatus comprising: a frame; a pair of spaced rollers mounted on said frame and disposed to rotate about a respective parallel, horizontal axis so that said body is capable of being rotatably supported thereon in the horizontal position; a clutch means for engaging and supporting the end of said body opposite said dish, to rotate said body about another horizontal axis; a beam disposed to pivot about another horizontal axis; a motor and grinding wheel mounted on said beam so that said grinding wheel moves down towards said body as said beam pivots; a counter-weight mounted on said beam so that said grinding wheel is lifted off said body by gravity; a clip capable of being removably fastened to said bar; and a tension spring disposed between said clutch means and said clip to dampen vibrations.