Patent ID: 9618155
Date: 2017-04-11
CPC Classifications: F16N

Claim:
1. A lubrication unit for delivering lubricant in a system, said unit comprising: a reservoir for holding a supply of lubricant; a motor; an axial piston pump in fluid communication with the reservoir and having a piston driven by the motor and a cylinder of a known cross-sectional area, said piston being moveable by the motor to reciprocate axially within the cylinder through a filling stroke in which lubricant is drawn from the reservoir into the cylinder and a pumping stroke in which lubricant is pushed out of the cylinder for delivery to the system; a flow rate sensor mounted downstream from the pump for measuring a flow rate of lubricant pushed out of the cylinder; and a control unit operatively connected to the flow rate sensor and the motor for controlling operation of the motor, the control unit including an input selector configured for selecting between controlling motor speed based on at least one characteristic selected from a group consisting of volume of lubricant pumped by the pump and flow rate of lubricant pumped by the pump.