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Patent

Gear pump assembly

TLDR
In this article, the upper and lower plates of a gear train are mounted with radial ports through which oil collected in the recessed area flows to the bearing and working parts before returning to the sump.
Abstract
A gear train is housed in a gear box having upper and lower plates in or on which gear-shaft bearings are mounted. One of the gears functions as a centrifugal gear pump for projecting lubricating oil from a sump in the tank angularly upwardly through openings in the upper bearing-mounting plate to a deflecter plate located thereabove. This oil is deflected angularly downwardly and collected in a recessed area on the upper surface of the upper bearing-mounting plate. Bearing caps are provided with radial ports through which oil collected in the recessed area flows to the bearings and working parts before returning to the sump.

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Citations
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Patent

Oil scavening system for gas turbine engine

TL;DR: In this paper, a gas turbine engine intended for airborne applications in which several of the main bearings of the engine are contained in a bearing cavity and oil is scavenged from this cavity by allowing air from the high pressure region of a engine to leak into the cavity and then flow downwardly, together with entrained scavenge oil from the cavity, through an oversized cored passage housing a quill shaft driving the accessory gearbox for delivery to a crude separator at the bottom of the gearbox where the air is discharged to a low pressure region and the deaerated oil
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Assembly including an AGB and an oil tank

TL;DR: In this paper, an assembly that includes an accessory gearbox (AGB) and a tank for a liquid lubricant for a turbojet engine is presented, including a gear connected to parallel shafts for mechanically driving accessories.
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Lubricant distribution system for scroll machine

TL;DR: An oil distribution system for lubricating bearings in a scroll compressor is described in this article, where an oil collector cup attached to the lower surface of a swing link is used to keep the oil in the collector when the compressor stops, so that it is available to lubricate adjacent bearing upon restart of the machine.
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Shaft mounted bearing lubricating device

TL;DR: In this article, a dip ring extending into an annular oil reservoir is used to draw oil upward to the impeller for recirculation of support bearing housing on a vertical rotating shaft.
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Volumetric screw compressor

TL;DR: In this article, the female rotor is covered with an overthickened layer of an erodable coating material containing particles of a dry lubricant material, and the inner surfaces of the housing and the outer surfaces of rotor threads are coated with an eroded coating material.
References
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Patent

Fluid lubricant system

Hugh L Dryden
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Evaporative air cooler