Abstract: A progressive distributor for lubricant includes a housing block having an inlet and a plurality of outlets and a plurality of metering pistons received in associated piston bores in the housing block. Each piston bore is associated with two lubricant outlet bores, and each metering piston is displaceable and configured to alternatingly release the one or the other lubricant outlet bore in order to dispense the metered lubricant amount to the lubricant outlet bore. The piston bores are fluidically connected to the lubricant inlet bore and to each other via connecting bores in order to transfer lubricant to the other piston bores. A dummy piston is disposed in one of the piston bores that permanently closes both the lubricant inlet bore and both lubricant outlet bores, and includes at least one bypass passageway that fluidically connects two of the connecting bores to each other.

Abstract: A lubricant pumping system includes a lubricant pump having a lubricant pumping space, a first seal configured to seal the lubricant pumping space, at least one signal detector, and a leakage detector for detecting leakage of a lubricant from the pumping space through the first seal and sending a signal to the signal detector in response to a detection of the leakage of the lubricant. The signal detector may produce a visual or acoustic output in response to receipt of the signal.

Abstract: A progressive distributor includes a housing block with an inlet bore and outlet bores and first and second metering pistons in first and second piston bores. Each piston defines first and second annular workspaces and delimits first and second metering spaces at the ends of each piston, the first and second piston bores each having a central axis and being disposed one atop the other so that their central axes are parallel to each other and located in a central plane. Switching bores connect the metering spaces of the first metering piston to the workspaces of the second metering piston, and the switching bores are located on opposite sides of the central plane.

Abstract: A lubrication distribution assembly is provided. The lubrication distribution assembly includes a lubrication metering device, which includes a piston. The lubrication distribution assembly also includes a sensor and a controller. The sensor automatically detects a piston stroke length of the piston over at least two movement cycles of the piston. The controller receives the piston stroke length from the sensor, sets an operating point of the piston based on the piston stroke length, and controls the lubrication metering device by utilizing the set operating point.

Abstract: A lubricant pumping system includes a lubricant pump having a lubricant pumping space, a first seal configured to seal the lubricant pumping space, at least one signal detector, and a leakage detector for detecting leakage of a lubricant from the pumping space through the first seal and sending a signal to the signal detector in response to a detection of the leakage of the lubricant. The signal detector may produce a visual or acoustic output in response to receipt of the signal.

Abstract: A progressive distributor includes a housing block with an inlet bore and outlet bores and first and second metering pistons in first and second piston bores. Each piston defines first and second annular workspaces and delimits first and second metering spaces at the ends of each piston, the first and second piston bores each having a central axis and being disposed one atop the other so that their central axes are parallel to each other and located in a central plane. Switching bores connect the metering spaces of the first metering piston to the workspaces of the second metering piston, and the switching bores are located on opposite sides of the central plane.

Abstract: A switching device for alternately connecting a hydraulic drive of a lubricating pump to a pressure line and to a return line of a hydraulic circuit. The switching device includes first and second drive lines connected to the hydraulic drive, and pressure and return drive lines connected to the pressure and return lines. A switching valve is in fluid communication with the drive lines and is switchable between first and second switching states to connect the pressure drive line to the first drive line or to the second drive line. A plurality of hydraulic control lines control the position of the switching valve. The drive lines are configured to conduct a first volumetric flow of hydraulic fluid and the hydraulic control lines are configured to conduct a second volumetric flow of the hydraulic fluid different than the first volumetric flow.

Abstract: A progressive distributor for lubricant includes a housing block having an inlet and a plurality of outlets and a plurality of metering pistons received in associated piston bores in the housing block. Each piston bore is associated with two lubricant outlet bores, and each metering piston is displaceable and configured to alternatingly release the one or the other lubricant outlet bore in order to dispense the metered lubricant amount to the lubricant outlet bore. The piston bores are fluidically connected to the lubricant inlet bore and to each other via connecting bores in order to transfer lubricant to the other piston bores. A dummy piston is disposed in one of the piston bores that permanently closes both the lubricant inlet bore and both lubricant outlet bores, and includes at least one bypass passageway that fluidically connects two of the connecting bores to each other.

Abstract: A lubricating-grease pump includes a pumping chamber, a leakage accumulation chamber, a seal configured to substantially seal the pumping chamber from the leakage accumulation chamber, at least one outlet from the pumping chamber, and at least one leakage-recovery arrangement configured to guide a quantity of grease that has leaked from the pumping chamber into the leakage accumulation chamber back into the pumping chamber. The leakage-recovery arrangement may include a first passageway connecting the leakage accumulation chamber to a storage region, a second passageway connecting the first passageway to the pumping chamber and a spring-biased piston in the storage region.

Abstract: A lubricant supplying device includes a feed pump that serves to pump lubricant from a lubricant reservoir to at least one lubrication point. A method for operating the lubricant supplying device includes measuring at least one operating parameter, such as temperature (T), of at least one part of a system to be lubricated and/or of the lubricant and/or of the environment. The at least one measured operating parameter (T) is supplied to a controller, where a required volumetric flow ({dot over (V)}target) of lubricant is determined based on a stored functional relationship ({dot over (V)}target=ƒ (T)) that generates the required volumetric flow ({dot over (V)}target) based upon the measured operating parameter (T). The feed pump is then actuated in order to achieve the determined, required volumetric flow ({dot over (V)}target).

Abstract: A switching device for alternately connecting a hydraulic drive of a lubricating pump to a pressure line and to a return line of a hydraulic circuit. The switching device includes first and second drive lines connected to the hydraulic drive, and pressure and return drive lines connected to the pressure and return lines. A switching valve is in fluid communication with the drive lines and is switchable between first and second switching states to connect the pressure drive line to the first drive line or to the second drive line. A plurality of hydraulic control lines control the position of the switching valve. The drive lines are configured to conduct a first volumetric flow of hydraulic fluid and the hydraulic control lines are configured to conduct a second volumetric flow of the hydraulic fluid different than the first volumetric flow.

Abstract: An oil-air lubricant distributor with a tubular distributor body that includes an oil-air mixture inlet and a plurality of lubrication-point outlets for dispensing the oil-air mixture to at least one consumer, wherein the lubrication-point outlets are connected to the oil-air mixture inlet via line channels, and the line channels are provided with an oil-air mixture from a mixture distributor unit, the mixture distributor unit including a single oil inlet, a single air inlet, and a plurality of oil-air-mixture outlets, and wherein the oil-air mixture inlet is directly but releasably connected to the mixture distributor, and the oil-air-mixture outlets are directly but releasably fluidly connected to the line channels in the tubular distributor body.

Abstract: A lubrication distribution assembly is provided. The lubrication distribution assembly includes a lubrication metering device, which includes a piston. The lubrication distribution assembly also includes a sensor and a controller. The sensor automatically detects a piston stroke length of the piston over at least two movement cycles of the piston. The controller receives the piston stroke length from the sensor, sets an operating point of the piston based on the piston stroke length, and controls the lubrication metering device by utilizing the set operating point.

Abstract: A lubricating-grease pump includes a pumping chamber, a leakage accumulation chamber, a seal configured to substantially seal the pumping chamber from the leakage accumulation chamber, at least one outlet from the pumping chamber, and at least one leakage-recovery arrangement configured to guide a quantity of grease that has leaked from the pumping chamber into the leakage accumulation chamber back into the pumping chamber. The leakage-recovery arrangement may include a first passageway connecting the leakage accumulation chamber to a storage region, a second passageway connecting the first passageway to the pumping chamber and a spring-biased piston in the storage region.

Abstract: A lubricating system for a bearing includes a lubricant supplying system having a first pumping device configured to introduce a first quantity of lubricant into the bearing, a lubricant disposal system including a second pumping device configured to remove a second quantity of lubricant from the bearing, and a controlling device configured to activate the first pumping device and the second pumping device interdependently with each other.

Abstract: A device for detecting a movement of a piston of a lubricant distributor includes a movable actuator including a first magnet element, and a movable indicator including a second magnet element. The actuator is configured to be moved from an initial actuator position to an end actuator position by a movement of the piston, and the actuator and the indicator are configured and disposed such that a magnetic force prevails between them such that the indicator is moved from an initial indicator position to an end indicator position by the movement of the actuator from the initial actuator position toward the end actuator position.

Abstract: A device for supplying lubricant to a lubrication point in a machine, a tunnel boring machine, for example, includes a lubrication pump unit and a control unit. The lubrication pump unit is configured to supply a quantity of the lubricant to the lubrication point, and the control unit is configured to regulate the quantity of lubricant based on a sensor measurement signal. The sensor measurement signal may be based on a temperature measured in a region of the lubrication point, a pressure measured in a region of the lubrication point, a measured viscosity of the lubricant, a measured dielectricity of the lubricant, a measured water content of the lubricant, a vibration intensity measured at a part of the machine, or a measured rotational speed of a part of the machine.

Abstract: A device for supplying lubricant to a lubrication point in a machine, a tunnel boring machine, for example, includes a lubrication pump unit and a control unit. The lubrication pump unit is configured to supply a quantity of the lubricant to the lubrication point, and the control unit is configured to regulate the quantity of lubricant based on a sensor measurement signal. The sensor measurement signal may be based on a temperature measured in a region of the lubrication point, a pressure measured in a region of the lubrication point, a measured viscosity of the lubricant, a measured dielectricity of the lubricant, a measured water content of the lubricant, a vibration intensity measured at a part of the machine, or a measured rotational speed of a part of the machine.

Abstract: An oil-air lubricant distributor with a tubular distributor body that includes an oil-air mixture inlet and a plurality of lubrication-point outlets for dispensing the oil-air mixture to at least one consumer, wherein the lubrication-point outlets are connected to the oil-air mixture inlet via line channels, and the line channels are provided with an oil-air mixture from a mixture distributor unit, the mixture distributor unit including a single oil inlet, a single air inlet, and a plurality of oil-air-mixture outlets, and wherein the oil-air mixture inlet is directly but releasably connected to the mixture distributor, and the oil-air-mixture outlets are directly but releasably fluidly connected to the line channels in the tubular distributor body.

Abstract: A pump for conveying a medium comprises a pump chamber having an intake opening and an outlet opening. A movable component is movably disposed in the pump chamber in order to convey a batch of the medium, which is located in the pump chamber, from the intake opening to the outlet opening. A ventilation device has a ventilation opening in fluid communication with the pump chamber. The ventilation opening is different from the intake opening and the outlet opening. The ventilation device is configured to reduce or at least substantially prevent, at least temporarily, the formation of a partial vacuum or a negative pressure in the pump chamber.