Patent ID: 8701836

Claim:
A device for supplying lubricant to lubrication points, said device comprising a conduit by means of which a lubricant source is connected to said lubrication points, an upstream injector formed as a metering valve for discharging a defined quantity of lubricant in a cycle comprising pressurization and depressurization of lubricant fed from the lubricant source and the upstream injector including a passage channel for flow of lubricant from the lubricant source past the upstream injector toward a downstream lubrication point via a next downstream injector, wherein the passage channel is formed as a bypass channel within the upstream injector for flow of lubricant from the lubricant source past the upstream injector to the next downstream injector, wherein the upstream injector is formed as a single-line distributor for dosing lubricant to a lubrication point and has a lubricant inlet and a lubricant outlet facing the lubrication point, wherein, between this inlet and this outlet, a sealing piston and a feed piston are guided so that they can move in a sleeve that is formed together with an inlet cap as a cartridge insert that can be inserted into said conduit, wherein the sealing piston has a peripheral sealing lip that allows a through-flow of lubricant in the feed direction and that prevents a backflow of lubricant and can move between a position opening a depressurization channel and a position blocking the depressurization channel, and wherein the feed piston can be moved against the force of an elastic element for feeding lubricant to said lubrication point in the feed direction and for drawing lubricant by force of the elastic element against the feed direction.