A lubrication pump includes a housing defining a bore, an adjustable cylinder sleeve within the bore, and a piston slidably movable within the bore along a longitudinal axis of the bore. A connector may be drivingly interposed between a cam and the piston for driving the piston in reciprocating axial motion. The connector may have a coupling for engaging the piston, which may enable rotational engagement between the connector and the piston. The connector may have a roller for bearing engagement with the cam, which may enable the connector to rotate about the longitudinal axis relative to the housing as the connector moves axially within the bore. The cam may be laterally displaceable relative to the connector. The cylinder sleeve may be adjustable relative to the piston for varying lubricant fluid output flow. The cylinder sleeve and corresponding piston may be interchangeably disposed in the housing.

An oil injection apparatus includes: a storage unit extruding lubricating oil through an ejection hole formed at a lower end thereof; a discharge unit communicating with the storage through the ejection hole and discharging the lubricating oil outside according to a pumping operation; a plurality of discharge pumps arranged at regular intervals in a circumferential direction of the discharge unit and having respective first ends disposed in the discharge unit; and a driving unit rotating in a direction to sequentially press the first ends of the discharge pumps, which are disposed in the discharge unit, thereby causing the discharge pumps to perform the pumping operation in turn.

An oil injection apparatus includes: a storage unit extruding lubricating oil through an ejection hole formed at a lower end thereof; a discharge unit communicating with the storage through the ejection hole and discharging the lubricating oil outside according to a pumping operation; a plurality of discharge pumps arranged at regular intervals in a circumferential direction of the discharge unit and having respective first ends disposed in the discharge unit; and a driving unit rotating in a direction to sequentially press the first ends of the discharge pumps, which are disposed in the discharge unit, thereby causing the discharge pumps to perform the pumping operation in turn.

This application relates to a battery operated grease gun comprising a body able to be connected to a container configured to store grease, the body defining first and second elongate chambers therein, the first chamber extending along a first axis and the second chamber extending along a second axis, the first axis being spaced from the second axis, and the second chamber having a smaller cross-sectional area than the first chamber; first and second pistons, the first piston configured to reciprocate within the first chamber along the first axis and the second piston configured to reciprocate within the second chamber along the second axis, the second piston having a smaller cross-sectional area than the first piston; a common grease channel, the common grease channel being disposed between the container and the first and second chambers such that the grease is able to flow from the container into the first and second chambers; an actuator connected to the body and moveable between a retracted position, whereby grease is able to flow through the common grease channel, and an engaged position, whereby grease is restricted from flowing through the common grease channel, the actuator being configured to cause reciprocation of the first piston and the second piston when moved between the engaged and retracted positions; and a grease outlet fluidically connected to the first and second chambers that allows for grease to be discharged from the grease gun. The battery operated grease gun may further comprise a high pressure/high flow switch in the form of a pressure-sensitive spool, bypass valve or gap-based bypass.

This application relates to a battery operated grease gun comprising a body able to be connected to a container configured to store grease, the body defining first and second elongate chambers therein, the first chamber extending along a first axis and the second chamber extending along a second axis, the first axis being spaced from the second axis, and the second chamber having a smaller cross-sectional area than the first chamber; first and second pistons, the first piston configured to reciprocate within the first chamber along the first axis and the second piston configured to reciprocate within the second chamber along the second axis, the second piston having a smaller cross-sectional area than the first piston; a common grease channel, the common grease channel being disposed between the container and the first and second chambers such that the grease is able to flow from the container into the first and second chambers; an actuator connected to the body and moveable between a retracted position, whereby grease is able to flow through the common grease channel, and an engaged position, whereby grease is restricted from flowing through the common grease channel, the actuator being configured to cause reciprocation of the first piston and the second piston when moved between the engaged and retracted positions; and a grease outlet fluidically connected to the first and second chambers that allows for grease to be discharged from the grease gun. The battery operated grease gun may further comprise a high pressure/high flow switch in the form of a pressure-sensitive spool, bypass valve or gap-based bypass.

The purpose of the present invention is to provide a lubricant injector that implements extrusion and pumping of a lubricant using a single power source, and that can intermittently perform the extrusion of the lubricant, the lubricant injector including: a storage unit including: a storage chamber filled with a lubricant; a piston provided in the storage chamber; a screw shaft coupled to the piston to lift and lower the piston while rotating; a following gear provided on a lower end of the screw shaft; and an elastic support member provided to elastically support the following gear; a power generation unit provided to provide a rotation driving force; and an emission unit including: a cylindrical cam rotating by operating in conjunction with the power generation unit; a driving gear provided on an upper end of the cylindrical cam; a plunger pumping the introduced lubricant; and a discharge passage.

The purpose of the present invention is to provide a lubricant injector that implements extrusion and pumping of a lubricant using a single power source, and that can intermittently perform the extrusion of the lubricant, the lubricant injector including: a storage unit including: a storage chamber filled with a lubricant; a piston provided in the storage chamber; a screw shaft coupled to the piston to lift and lower the piston while rotating; a following gear provided on a lower end of the screw shaft; and an elastic support member provided to elastically support the following gear; a power generation unit provided to provide a rotation driving force; and an emission unit including: a cylindrical cam rotating by operating in conjunction with the power generation unit; a driving gear provided on an upper end of the cylindrical cam; a plunger pumping the introduced lubricant; and a discharge passage.

A lubricator pump adjuster for use with a lubricator pump having a piston housed in a pump body and a rocker connected to the piston. The lubricator pump adjuster comprises a mounting fitting attachable to the pump body and a housing disposed on the mounting fitting. An actuator is disposed in the housing and connectable to the rocker, whereby activation of the actuator causes the rocker to move, thereby adjusting the stroke of the piston. The actuator is a rotary actuator with an output shaft. The lubricator pump adjuster includes a cam faced member attached to the output shaft, and a plunger in contact with the cam faced member that is connectable to the rocker. The cam faced member may include a spiral-ramped surface.

A lubricator pump adjuster for use with a lubricator pump having a piston housed in a pump body and a rocker connected to the piston. The lubricator pump adjuster comprises a mounting fitting attachable to the pump body and a housing disposed on the mounting fitting. An actuator is disposed in the housing and connectable to the rocker, whereby activation of the actuator causes the rocker to move, thereby adjusting the stroke of the piston. The actuator is a rotary actuator with an output shaft. The lubricator pump adjuster includes a cam faced member attached to the output shaft, and a plunger in contact with the cam faced member that is connectable to the rocker. The cam faced member may include a spiral-ramped surface.

An oil injection apparatus includes: a storage unit extruding lubricating oil through an ejection hole formed at a lower end thereof; a discharge unit communicating with the storage through the ejection hole and discharging the lubricating oil outside according to a pumping operation; a plurality of discharge pumps arranged at regular intervals in a circumferential direction of the discharge unit and having respective first ends disposed in the discharge unit; and a driving unit rotating in a direction to sequentially press the first ends of the discharge pumps, which are disposed in the discharge unit, thereby causing the discharge pumps to perform the pumping operation in turn.