Method of dosing lubricant grease with a lubricant dispenser
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United States of America Patent
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Jun 27, 2017
Grant Date -
Nov 10, 2016
app pub date -
Oct 28, 2013
filing date -
Nov 23, 2012
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The invention relates to a method of dosing lubricating grease with a lubricant dispenser (1), comprising a lubricant cartridge (3) filled with lubricating grease (2) and holding a plunger (4) for expelling the lubricating grease (2), a spindle (6) driven by a direct-current drive motor (5) for moving the plunger (4), a power supply (7), a controller (8) for operating the motor (5) with a microcontroller (9), and a device (10) for interrupting the motor current flowing through the motor (5). The motor (5) is started up by the controller (8) in adjustable time intervals and a dose of dispensed agent is expressed from the cartridge (3) through a plunger motion with a predetermined plunger stroke. The motor current and the motor voltage are measured during motor operation, and the motor runtime, and the plunger stroke is calculated with the current and voltage measured values and at least one motor characteristic. The motor current is interrupted when the motor operating time reaches the calculated motor runtime.
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