Patent ID: 8858190
Filing Date: 2014-10-14
Classification: F04B,F04F,F16K

Abstract:
1. A pump comprising: a tank having a liquid inlet port and a liquid discharge port; a tank cover having a motive valve inlet and a vent valve outlet; a motive valve for opening and closing said motive valve inlet; a vent valve for opening and closing said vent valve outlet; a valve actuation linkage connected to said motive valve and said vent valve; a float; a float arm coupled to said float; a pump frame mounted to the tank cover within an interior of the tank, wherein the float arm is pivotally mounted to the pump frame, and mechanically attached to the valve actuation linkage; a plunger rod mechanically coupled to the float arm; a plunger configured and disposed to control the flow of liquid exiting the tank via the liquid discharge port, wherein the plunger includes a rod receptacle configured and disposed to receive and guide a distal end of the plunger rod therewithin, and wherein the plunger rod is unattached to the plunger and forms a lost motion device therewith; and a spring configured and disposed to bias the plunger in an opened position.