A lubricant, injector includes an injector body having an inlet port fluidly coupleable with a lubricant supply, an outlet port fluidly coupleable with a lubrication point, a piston chamber and a valve chamber. A piston is disposed within the piston chamber and defines a measuring section and an actuating section, the piston being linearly displaceable along an axis through the piston chamber so as to inversely vary the volume of the chamber measuring section and the volume of the chamber actuating section. A valve member disposed within the valve chamber is displaceable along an axis through the valve chamber between a first position, at which the inlet port is fluidly coupled with the piston chamber actuating and measuring sections, and a second position at which the inlet port is fluidly coupled with the piston chamber actuating section and the outlet port is fluidly coupled with the piston chamber measuring section.

A lubricant injector includes a body having an inlet at a first end fluidly coupleable to a lubricant source, an outlet, a delivery chamber coupled with the outlet and a bore defined by a substantially circular inner surface with a constant inner diameter and spaced axially from the body inlet, the bore having a first port fluidly connected with the body inlet and a second port disposed between the body inlet and the first port and fluidly connected with the delivery chamber. A generally circular cylindrical piston is disposed within the bore so as to divide the bore into an operating chamber fluidly coupled with the first port and a measuring chamber fluidly coupled with the second port and located axially between the operating chamber and the body first end. The piston has an outer circumferential slidably disposed against the bore inner surface and having a generally constant outside diameter.

A lubricant injector includes a body having an inlet at a first end fluidly coupleable to a lubricant source, an outlet, a delivery chamber coupled with the outlet and a bore defined by a substantially circular inner surface with a constant inner diameter and spaced axially from the body inlet, the bore having a first port fluidly connected with the body inlet and a second port disposed between the body inlet and the first port and fluidly connected with the delivery chamber. A generally circular cylindrical piston is disposed within the bore so as to divide the bore into an operating chamber fluidly coupled with the first port and a measuring chamber fluidly coupled with the second port and located axially between the operating chamber and the body first end. The piston has an outer circumferential slidably disposed against the bore inner surface and having a generally constant outside diameter.

A lubricant injector includes a body having an inlet fluidly coupleable to a lubricant source, an outlet, and an elongated bore extending along an axis and having an outer end proximal to the body second end, a closed inner end spaced axially from the body first end, a first port, and a second port disposed generally between the bore closed end and the first port. A delivery chamber separate from the bore has an inlet port and an outlet port fluidly coupled with the body outlet. A piston disposed within the bore divides the bore into an operating chamber coupled with the first port and a measuring chamber coupled with the second port. The operating chamber is fluidly coupled with the inlet and the measuring chamber is located between the bore closed end and the operating chamber and is fluidly coupleable with the inlet and alternatively with the delivery chamber.

A lubricant injector includes a body having an inlet fluidly coupleable to a lubricant source, an outlet, and an elongated bore extending along an axis and having an outer end proximal to the body second end, a closed inner end spaced axially from the body first end, a first port, and a second port disposed generally between the bore closed end and the first port. A delivery chamber separate from the bore has an inlet port and an outlet port fluidly coupled with the body outlet. A piston disposed within the bore divides the bore into an operating chamber coupled with the first port and a measuring chamber coupled with the second port. The operating chamber is fluidly coupled with the inlet and the measuring chamber is located between the bore closed end and the operating chamber and is fluidly coupleable with the inlet and alternatively with the delivery chamber.

A lubricant injector includes a housing and a metering section attached to the housing. The housing includes a body and a metering cylinder extending from the body. The metering section includes a diaphragm disposed within the metering cylinder. The diaphragm forms a static seal between the metering cylinder and a lubricant pathway that extends through the body, and the diaphragm defines a metering chamber for measuring a volume of lubricant to be applied during a lubrication cycle. A retaining member secures the diaphragm within the metering cylinder.

A lubricant injector includes a housing and a metering section attached to the housing. The housing includes a body and a metering cylinder extending from the body. The metering section includes a diaphragm disposed within the metering cylinder. The diaphragm forms a static seal between the metering cylinder and a lubricant pathway that extends through the body, and the diaphragm defines a metering chamber for measuring a volume of lubricant to be applied during a lubrication cycle. A retaining member secures the diaphragm within the metering cylinder.

In a hydraulic control device, a first valve device is brought into an open state when a first value obtained by subtracting a value of a pressure in the first output side oil passage from a value of a pressure in the second output side oil passage is equal to or larger than a first threshold value. A second valve device is brought into an open state when an oil pressure in a third connection oil passage is equal to or larger than a second threshold value, and is brought into a closed state when the oil pressure in the third connection oil passage is smaller than the second threshold value. The first value is equal to or larger than the first threshold value and the first valve device is in the open state when the second valve device is in the closed state.

In a hydraulic control device, a first valve device is brought into an open state when a first value obtained by subtracting a value of a pressure in the first output side oil passage from a value of a pressure in the second output side oil passage is equal to or larger than a first threshold value. A second valve device is brought into an open state when an oil pressure in a third connection oil passage is equal to or larger than a second threshold value, and is brought into a closed state when the oil pressure in the third connection oil passage is smaller than the second threshold value. The first value is equal to or larger than the first threshold value and the first valve device is in the open state when the second valve device is in the closed state.

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.