A lubricant dispenser comprising a housing, a lubricant supply container, a plunger, a telescopic hollow spindle, and an electromechanical servo-drive for changing the length of the telescopic hollow spindle. One end of the telescopic hollow spindle is fixed on the housing. With its other end, the t
A lubricant dispenser comprising a housing, a lubricant supply container, a plunger, a telescopic hollow spindle, and an electromechanical servo-drive for changing the length of the telescopic hollow spindle. One end of the telescopic hollow spindle is fixed on the housing. With its other end, the telescopic hollow spindle cooperates with a plunger containing a passage opening for lubricant. The telescopic hollow spindle has a lubricant passage channel in which at least one check valve is arranged on the inlet side. The telescopic hollow spindle alternately carries out setting strokes of different lengths that increase or reduce the length of the spindle. The setting strokes are coordinated with each other so that with a setting stroke of the telescopic hollow spindle increasing the length of the spindle, a preset amount of lubricant displaced by the movement of the plunger enters the lubricant passage channel through the opening check valve.
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A lubricant dispenser comprising a housing, a lubricant supply container, a plunger, a telescopic hollow spindle, and an electromechanical servo-drive for changing the length of the telescopic hollow spindle. One end of the telescopic hollow spindle is fixed on the housing. With its other end, the t
A lubricant dispenser comprising a housing, a lubricant supply container, a plunger, a telescopic hollow spindle, and an electromechanical servo-drive for changing the length of the telescopic hollow spindle. One end of the telescopic hollow spindle is fixed on the housing. With its other end, the telescopic hollow spindle cooperates with a plunger containing a passage opening for lubricant. The telescopic hollow spindle has a lubricant passage channel in which at least one check valve is arranged on the inlet side. The telescopic hollow spindle alternately carries out setting strokes of different lengths that increase or reduce the length of the spindle. The setting strokes are coordinated with each other so that with a setting stroke of the telescopic hollow spindle increasing the length of the spindle, a preset amount of lubricant displaced by the movement of the plunger enters the lubricant passage channel through the opening check valve. ivoting when the latching cylinder is in a home position, whereby the movement of the engagement structure moves the bearing structure away from the bellcrank, which may then pivot to retract the locking pin and allow for the telescoping movement of the selected boom section. 4. The locking and latching system according to claim 2, wherein at least one of said latching plates includes a bearing structure for preventing the bellcrank from pivoting, whereby the movement of the latching plates to the latched position moves the bearing structure away from the bellcrank, which may then pivot to retract the locking pin and allow for the telescoping movement of the selected boom section. 5. The system according to claim 2, wherein the bellcrank is U-shaped and the locking pin is coupled to an I-shaped receiver including opposed channels for receiving a bearing structure projecting inwardly from each sidewall of the U-shaped bellcrank, whereby the engagement between the bearing structure and corresponding surfaces of the I-shaped receiver serves to retract the locking pin when the bellcrank pivots. 6. The system according to claim 5, wherein the locking device further includes a spring for normally biasing the locking pin into the locked position in a corresponding opening in the next-adjacent boom section, whereby the pivoting action of the bellcrank serves to overcome the biasing force of the spring to disengage the locking pin from the opening. 7. The locking and latching system according to claim 6, wherein a piston rod of the locking and latching cylinder is coupled to the pivoting bellcrank, whereby retraction of the piston rod assists in pivoting the bellcrank to retract the locking pin of the locking device and extension of the piston rod assists in pivoting the bellcrank to move the locking pin to the locked position. 8. The locking and latching system according to claim 1, wherein the locking and latching cylinder is axially aligned with and coupled to a movable support frame supported by the extension device. 9. The locking and latching system according to claim 8, wherein: the movable support frame includes first and second projections axially aligned with the extension device, each having an engagement head; and the latching device includes first and second pairs of spaced latching plates, wherein the pairs of latching plates are simultaneously moved toward a latched position by the engagement head of the each projection when the locking and latching cylinder is retracted and moved toward an unlatched position when the locking and latching cylinder is extended. 10. The locking and latching system claim 8, wherein the first and second pairs of spaced latching plates for engaging corresponding apertures in the selected boom section are provided above and below the extension device. 11. A telescoping boom assembly including at least two boom sections and an extension cylinder having a first longitudinal axis for telescopically moving a selected boom section relative to at least one next-adjacent boom section, said boom assembly comprising: a latching device associated with the extension cylinder, said latching device including at least two pivoting latching plates for latching the selected boom section to the extension cylinder in a latched position, each said latching plate having a portion for projecting at least partially into a corresponding aperture in the selected boom section in the latched position and a camming surface; a locking device associated with the selected boom section, said locking device including a retractable locking pin for locking the selected boom section in place relative to the next-adjacent boom section; and a locking and latching cylinder having a second longitudinal axis axially aligned with the first longitudinal axis of the extension cylinder, said locking and latching cylinder being associated with an engagement structure including a projection for engaging each camming surface for
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Yun Jong Yang KR, Apparatus for automatically feeding lubricating oil.
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