Patent ID: 8448750
Filing Date: 2013-05-28
Classification: B67D,F16N,G01F

Abstract:
1. A machine lubrication system, comprising: a lubricant reservoir, the reservoir defining a cavity with a longitudinal axis and a cross-sectional dimension perpendicular to the axis; a follower disposed within the reservoir, the follower substantially conforming to the cross-sectional dimension and configured for movement along the axis within the reservoir cavity; a first level sensor comprising a plurality of magnetically actuated switches and resistors that are parts of a sensor circuit disposed within the cavity aligned parallel to the axis; and a magnet connected to the follower, wherein the magnet is positioned to actuate at least one of the switches as the follower moves along the axis within the reservoir cavity, and each of the switches corresponding to a different electrical resistance in the sensor circuit; and a second level sensor comprising at least one magnetically actuated switch, wherein the first and second level sensors are independently connected to one or more power sources.