| 主权项 |
1. A lubrication device comprising
a tank of fluid lubricant to be dispensed to a user position, means for raising the pressure of said lubricant, a regulating device for regulating flow rate of a pressurized lubricant, and distribution means enabling the lubricant flow to be conveyed to said user position with regulated flow rate, the regulating device comprising a body provided at least with one lubricant feed channel and one lubricant outflow channel, the feed channel and the outflow channel being put into communication by an aperture, wherein within an interior of the aperture a valving element is movable to at least partially obstruct or free said aperture to vary a passage cross-section of a passageway for said lubricant from the lubricant feed channel to the lubricant outflow channel to regulate flow rate of said lubricant, the valving element cooperating with drive means for regulating axial position of the valving element relative to the aperture, the valving element comprising opposed first and second ends, the first end being a free end proximal to the aperture, the second end being distal to the aperture, wherein said valving element is provided with a perimetral lateral surface in which at least one window is provided in communication with the free end of the valving element, the window defining the passageway for said lubricant from the lubricant feed channel to the lubricant outflow channel, wherein the passageway passes within the valving element, wherein said window presents, in lateral view, an axially extending first section distal from the free end, and a second section proximal to the free end, a back end of the second section being adjacent to the first section to be in communication with the first section, the second section comprises an axially extending diametrical slot which diverges from the back end of the second section towards the free end, wherein the first section is defined by an axially extending diametrical slot and presents in lateral view a substantially constant lateral overall size, wherein the first section of the window and the second section of the window extend radially through the entire diameter of the valving element and the window extends along the whole length of the valving element, and the free end defines an opening having a greater lateral cross-section than any lateral cross-section of said first section, wherein the aperture has a lateral dimension sufficient to not laterally obstruct the free end and a portion of the valving element in proximity to the free end, wherein an outer surface of the valving element presents in proximity to the free end a conical portion. |
