Liquid level gauge and valve

Claim 1

An integrated combination liquid level indicator and flow valve for use with a tank having a storage chamber therein comprising: a hollow non-magnetic body having thread means along one end portion thereof for securing to a fitting on said tank and having an elongated central chamber communicating with said tank when said body is secured with said tank; said body being provided with a lateral pressure release flow passage in one side of said body communicating with said chamber in said body; a relief valve secured on said body over said pressure release flow passage for permitting fluid flow from said chamber of said tank when the pressure therein exceeds a predetermined value; said body having a fluid inlet and outlet flow passage communicating with said chamber in said body said passage having a first portion aligned with said pressure release passage on the opposite side of said body and a second portion normal to said first portion and opening to the outside of said body; a valve secured with said body for movement between open and closed positions in said first portion of said inlet and outlet flow passage for controlling fluid flow into and out of said chamber of said tank through said second passage portion of said body; a tubular support member secured with said body and disposed along one end portion within said chamber of said tank when said body is secured with said tank and along the other end portion in concentric spaced relation in said body chamber; bearing means connected with said other end portion of said support member; a rotatable shaft disposed through said bearing means having a first end terminating in said chamber of said tank and a second end terminating in said chamber of said body near the upper end thereof; a first bevel gear on said first end of said shaft; a second bevel gear rotatably secured with said support member in said chamber meshing with said first bevel gear; a float rod secured with said second bevel gear; a float secured on one end of said float rod for moving said rod responsive to the liquid level in said tank to rotate said bearing supported shaft; a counterweight secured on the other end of said rod; a magnet secured on said second end of said shaft at the upper end of said chamber in said body; said body having an upwardly opening recess in the top thereof separated from said chamber of said body; and a magnetically responsive indicator dial supported in said body recess and observable from outside said body, said indicator dial being rotated responsive to said magnet on said shaft for indicating the liquid level in said chamber of said tank.