An automatic lubricator for lubricating an object is described, which comprises a housing with a coupling section configured to couple with a lubricant container containing a lubricant, wherein the lubricant container comprises a rotatable shaft with a piston to dispense the lubricant from an output of the lubricant container. The lubricator further comprises an electric motor configured to drive the rotatable shaft of the lubricant container during at least one lubrication action, such that at least a part of the lubricant is dispensable from the lubricant container during the at least one lubrication action, and a power supply configured to supply the electric motor with a supply current during the at least one lubrication action. The lubricator further comprises a control circuitry configured to acquire a current signal indicative of the supply current over time during at least a part of the at least one lubrication action, determine a periodicity of the acquired current signal, and determine, based on the determined periodicity, at least one lubrication parameter indicative of the at least one lubrication action.

An automatic lubricator for lubricating an object is described, which comprises a housing with a coupling section configured to couple with a lubricant container containing a lubricant, wherein the lubricant container comprises a rotatable shaft with a piston to dispense the lubricant from an output of the lubricant container. The lubricator further comprises an electric motor configured to drive the rotatable shaft of the lubricant container during at least one lubrication action, such that at least a part of the lubricant is dispensable from the lubricant container during the at least one lubrication action, and a power supply configured to supply the electric motor with a supply current during the at least one lubrication action. The lubricator further comprises a control circuitry configured to acquire a current signal indicative of the supply current over time during at least a part of the at least one lubrication action, determine a periodicity of the acquired current signal, and determine, based on the determined periodicity, at least one lubrication parameter indicative of the at least one lubrication action.

The invention relates to a lubricating device that includes a lubricant pump, a lubricant reservoir for supplying lubricant to a machine to be lubricated, a control unit for determining an operating state of a machine and for operating the lubricant pump based on the signals of at least one sensor configured to detect emissions emanating from the machine to be lubricated, and a housing configured to be attached to a lubrication nozzle of the machine to be monitored. It is proposed that a reading of the signals of the sensor by the control unit is limited to a predetermined set of time windows with a predetermined width, wherein the time windows are separated by an interval where the signals of the sensor are not read.

A ratiometric system for autonomous lubrication of oilwell production equipment. In one arrangement a lubrication pump is fluidly connected to a stuffing box on an oilwell pumping unit. The interval for lubrication and the duration of lubrication is managed by an event sequencer that is electrically connected to the well controller for the pumping unit. The well controller senses a completed cycle of the pumping unit and produces an electronic pulse that can be counted. The event sequencer counts the pulses as they occur. A lubrication cycle is triggered when the sequencer reaches a count corresponding to a predetermined value. The amount of lubrication supplied is directly related to the number of completed cycles of the pumping unit.

A ratiometric system for autonomous lubrication of oilwell production equipment. In one arrangement a lubrication pump is fluidly connected to a stuffing box on an oilwell pumping unit. The interval for lubrication and the duration of lubrication is managed by an event sequencer that is electrically connected to the well controller for the pumping unit. The well controller senses a completed cycle of the pumping unit and produces an electronic pulse that can be counted. The event sequencer counts the pulses as they occur. A lubrication cycle is triggered when the sequencer reaches a count corresponding to a predetermined value. The amount of lubrication supplied is directly related to the number of completed cycles of the pumping unit.