Wheel bearing pressure lubricator
OwnerKenneth C. Ploegerinventor
Life of this patent
Estimating the term…
Abstract
A wheel bearing pressure lubricator comprising a hollow body having an open end connected with a wheel hub and forming a closure cap therefor, a piston sealingly and slidably mounted in the body and a spring member urging the piston toward the hub and bearings therein and constantly applying a positive pressure on the lubricant packing the hub. A lubrication fitting for filling the lubricator is attached to the body and an overflow aperture is disposed to the sidewall of the body at a point adjacent to the hub filled position of the piston for relieving excess lubricant pressure and a piston position indicator providing visual indication when the piston is in hub filled position and when the piston is in no pressure position at which the piston ceases to apply pressure to the lubricant in the hub.
Claims4
A wheel bearing pressure lubricator comprising:
- (a) a hollow cap having a side wall, a central aperture, an open end and a closed end, said open end being adapted for sealing engagement with a wheel hub, said side wall having an interior surface with a substantially cylindrical shape;
- (b) a tubular member having connection with a central portion of said closed end and extending therefrom between and concentrically with said side wall;
- (c) a lubricator fitting connected with said closed end and communicating with said tubular member;
- (d) a piston structure slidably and sealingly mounted on said tubular member and having a marginal edge thereof sealingly engaging the interior surface of said side wall;
- said marginal edge having a defined length;
- (e) a spring member positioned between said piston structure and said closed end and urging said piston structure toward the open end;
- (f) a vent aperture disposed through said cap at a point adjacent to said closed end;
- (g) an abutment means in said cap limiting translation movement of said piston structure toward said open end and having openings for communication of wheel hub lubricant pressure to said piston structure;
- (h) an overflow opening extending through said side wall in spaced relation to said abutment means and at a point whereby the pressure of lubricant in said wheel hub moves said piston structure away from the abutment means to a filled position exposing said overflow opening to prevent excess lubricant pressure in the wheel hub;
- (i) a piston position indicator aperture in said side wall with a location and size relative to the length of the piston marginal edge to be closed thereby when the piston structure is translated to said hub filled position and to be open when the piston structure engages the abutment means and ceases to apply pressure to lubricant in the wheel hub.
Dependencies are inferred from the claim text.