Patent ID: 6070698
Filing Date: 2000-06-06
Classification: F16N

Abstract:
An air line oiler serving to furnish an atomized lubricant from a liquid supply thereof into a working air line delivering compressed air to a pneumatic tool including a rock drill, comprising:a reservoir for said supply of liquid lubricant and equipped for holding the same at the working air line pressure;a base for supporting said reservoir;a first air conduit arranged in said base, said conduit serving as a portion of the working airline;an air inlet nozzle arranged within said first air conduit and oriented to project substantially co-axially into the air stream opposite to the direction of air flow when the oiler is included in the working air line;a second air conduit in operative communication between said lubricant holding reservoir and said inlet nozzle serving to pressurize said reservoir at the line pressure; a lubricant delivery nozzle co-axially arranged in said first air conduit and oriented to project substantially in the direction of air flow;a fluid conduit in operative communication between said lubricant holding reservoir and said delivery nozzle serving to afford lubricant flow to said delivery nozzle;metering valve means arranged in said fluid conduit serving to permit regulation of the flow of lubricant delivered from said reservoir to the delivery nozzle;said delivery nozzle having a bore dimension related to the viscosity and surface tension of the lubricant such that the lubricant weeps along the fluid conduit to coalesce inwardly of the nozzle tip, the onrushing air in the first air conduit withdrawing the lubricant from the bore and converting it into an atomized form for entrainment into the working air line for delivery to the pneumatic tool.