A lubricant injector used for dispensing a preselected amount of grease when the grease is delivered to the injector in a pressurized condition, the lubricant injector includes a generally cylindrical body which includes an upper grease reservoir adapted to selectively receive grease from a lower grease reservoir, wherein both reservoirs are filled with grease, the body includes a lower grease inlet and an upper grease outlet, the body also includes an inlet and an outlet. It further includes a shuttling spool slid-ably housed axially within the body wherein the shuttling spool is adapted to move axially upwardly upon application of pressurized grease at the inlet, and axially downwardly when the grease is not pressurized at the inlet such that upon application of pressurized grease at the inlet the shuttling spool is urged axially upwardly toward the outlet and configured to close off grease communication between the upper and lower grease reservoirs and substantially simultaneously open the inlet for communication of a preselected amount of grease into the lower grease reservoir. The lubricant injector is configured such that upon the preselected amount of grease entering the lower grease reservoir, simultaneously an equivalent amount of grease is dispensed from the outlet of the upper grease reservoir, and during this operation the upper and lower grease reservoirs are isolated.

A lubricant injector used for dispensing a preselected amount of grease when the grease is delivered to the injector in a pressurized condition, the lubricant injector includes a generally cylindrical body which includes an upper grease reservoir adapted to selectively receive grease from a lower grease reservoir, wherein both reservoirs are filled with grease, the body includes a lower grease inlet and an upper grease outlet, the body also includes an inlet and an outlet. It further includes a shuttling spool slid-ably housed axially within the body wherein the shuttling spool is adapted to move axially upwardly upon application of pressurized grease at the inlet, and axially downwardly when the grease is not pressurized at the inlet such that upon application of pressurized grease at the inlet the shuttling spool is urged axially upwardly toward the outlet and configured to close off grease communication between the upper and lower grease reservoirs and substantially simultaneously open the inlet for communication of a preselected amount of grease into the lower grease reservoir. The lubricant injector is configured such that upon the preselected amount of grease entering the lower grease reservoir, simultaneously an equivalent amount of grease is dispensed from the outlet of the upper grease reservoir, and during this operation the upper and lower grease reservoirs are isolated.

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.

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.

A housing for a device for metered dispensing of a medium, the housing including at least one inlet, preferably threadless, configured to allow the medium to enter the housing from a reservoir, a plurality of receptacles, preferably threadless, a metering device in each of the plurality of receptacles, an inlet line connected to the at least one inlet, and a plurality of distribution lines connected to the inlet line and to each of the plurality of receptacles, wherein the housing includes a plastic material.

The invention relates to a hydraulic positioning device for an agricultural implement, wherein preferably a uniform movement of several hydraulic cylinders is achieved by using a progressive distributor.

A lubricant injector is provided including a body having a passageway, an inlet, an outlet, and an aperture for lubricant to flow from a measuring chamber into the passageway. A piston is slidable along the passageway. When the piston is in a retracted position, a discharge chamber is present in the passageway between the piston and the outlet. A biasing spring is disposed in the passageway for urging the piston towards the retracted position. The injector has a rest mode, wherein no pressurized lubricant is supplied to the inlet, and the piston is retracted. The injector has a pressurized mode wherein the piston is under pressure and is moved to its extended position to urge lubricant out the outlet. In the rest mode, the spring urges the piston towards its retracted position to create the discharge chamber and to open the aperture between the measuring chamber and the discharge chamber.

A lubricant injector is provided including a body having a passageway, an inlet, an outlet, and an aperture for lubricant to flow from a measuring chamber into the passageway. A piston is slidable along the passageway. When the piston is in a retracted position, a discharge chamber is present in the passageway between the piston and the outlet. A biasing spring is disposed in the passageway for urging the piston towards the retracted position. The injector has a rest mode, wherein no pressurized lubricant is supplied to the inlet, and the piston is retracted. The injector has a pressurized mode wherein the piston is under pressure and is moved to its extended position to urge lubricant out the outlet. In the rest mode, the spring urges the piston towards its retracted position to create the discharge chamber and to open the aperture between the measuring chamber and the discharge chamber.

A lubricant injector includes a lubricant inlet, a lubricant outlet, a control piston and a metering piston. The control piston is configured to conduct lubricant from the lubricant inlet to the metering piston, and the metering piston is configured to pump the lubricant provided by the control piston to the at least one lubricant outlet. The metering piston includes a first metering chamber and a second metering chamber that are each connected to the at least one lubricant outlet. The lubricant injector further includes first and second lubricant channels, and in a first switching state of the control piston the lubricant inlet is connected via the first control space to the first lubricant channel and the second metering chamber, and in a second switching state the lubricant inlet is connected via the second control space to the second lubricant channel and the first metering chamber.

A lubricant injector includes a lubricant inlet, a lubricant outlet, a control piston and a metering piston. The control piston is configured to conduct lubricant from the lubricant inlet to the metering piston, and the metering piston is configured to pump the lubricant provided by the control piston to the at least one lubricant outlet. The metering piston includes a first metering chamber and a second metering chamber that are each connected to the at least one lubricant outlet. The lubricant injector further includes first and second lubricant channels, and in a first switching state of the control piston the lubricant inlet is connected via the first control space to the first lubricant channel and the second metering chamber, and in a second switching state the lubricant inlet is connected via the second control space to the second lubricant channel and the first metering chamber.