Tank for transporting liquid material
OwnerCornelis van der Lelyinventor
Life of this patent
Estimating the term…
Abstract
A tank wagon for transporting liquid material has a suction pump for drawing liquid material into the tank. Various sensing devices are used to prevent over filling so that material drawn into the tank does not reach the pump. In one form, a float valve in the vacuum conduit shuts the same and/or electrodes are positioned to sense the material level and energize a relay-operated switch that stops the engine driving the pump. Several indicators in the form of lamps or an acoustic horn are operated by short-circuiting electrodes within the tank and give a signal or indication of the liquid level within the tank. In a further embodiment, a float within the tank actuates an ammeter outside the tank to give a signal or reading of the liquid level within the tank.
Claims7
A tank for transporting liquid material comprising an enclosed tank having an internal float, said float being pivoted to external indication means that signals the level of said float means and material within the tank, a pivot member interconnected to said float means and said member extending through a liquid seal means in a housing on said tank to said float means, said indication means comprising an electrical circuit having variable switch means associated with a movable portion of the pivot member, said portion and electrical circuit being located outside the tank, said pivot member being actuated responsive to the movements of said float, said electrical circuit including a signal device which indicates the position of said pivot member relative to said switch means and the level of material within said tank, said seal means comprising a seal element in said housing and said housing defining an air-free space filled with hydraulic fluid, said pivot member comprising a shaft that extends through said element and said fluid, said movable portion and said circuit being insulated from the liquid material in said tank and said signal device being positionable remote from said tank.
Dependencies are inferred from the claim text.