Dual displacement fluid level control pump

摘要

A pump for exchange of fluid between an apparatus reservoir and a reserve reservoir. The pump may have an elongated tubular body with a central bore with a reservoir end portion, an inlet end portion and an intermediate barrel portion. A piston assembly with a driving piston with a stem member with nonmagnetic properties attached and the stem member has a tubular extension member attached with all in longitudinal axis alignment slidably positioned in the central bore to position the driving piston adjacent to an electromagnetic coil assembly that is positioned around the intermediate barrel portion and to position the tubular extension member for a reservoir end to extend outwardly at the reservoir end portion opening. An output tubular member with a pressure relief valve is attached to an output port in a side wall of the reservoir end portion positioned for release of fluid through an output port.

主权项

1. A pump for exchange of a fluid between an apparatus reservoir and a reserve reservoir comprising:
an elongated tubular body with a central bore that has a reservoir end portion, an inlet end portion and an intermediate barrel portion; a piston assembly with a driving piston that has a stem member that is nonferrous attached and said stem member has a tubular extension member attached all in longitudinal axis alignment is slidably disposed in said central bore to position said driving piston adjacent to an electromagnetic coil assembly that is disposed around said intermediate barrel portion and to position said tubular extension member for a reservoir end to extend outwardly at said reservoir end opening; a piston spring is positioned over said stem member and said tubular extension member and positioned against said driving piston on a stem end; an output tubular member is attached to an output port in a side wall of said reservoir end portion with a first pressure relief valve disposed in said output tubular member for release of fluid through an output port; said piston assembly has a piston central bore open at said reservoir end and open adjacent a heel end of said driving piston with a second pressure relief valve adjacent said heel end, and a third pressure relief valve disposed in said central bore between said heel end and adjacent to an inlet port of said inlet end portion; a fourth pressure relief valve is annularly disposed around said tubular extension member between a bushing attached in said reservoir end portion at an open end and an annular bearing in said central bore for release of fluid through said reservoir end opening and into said central bore; and said electromagnetic coil is connected to an electronic power and control circuit.