Hub lubrication system

A system of lubricating a hub assembly, said hub assembly including a spindle having an inner end attachable to an axle and an outer free end, inner and outer bearing assemblies spaced along said spindle, and a hub body around said spindle and rotatable on said bearings;

• the system comprising means to introduce grease within said hub body a circumferential recess in the outside of said hub body at an axial location on the outer side of said outer bearing assembly;
• at least one opening in said recess for grease within said hub body to pass therethrough;
• and means in said recess to close said opening while permitting the controlled discharge of grease therethrough to indicate a complete greasing of the hub assembly.

A hub-axle assembly comprising a spindle having an inner end attachable to the axle and a outer free end, inner and outer bearing assemblies spaced along said spindle, a hub body around said spindle and rotatable on said bearing assemblies, a wheel mounting flange extending radially outwardly of said hub body, means to introduce grease through said wheel mounting flange and to a location internally of said hub body, a recess in the outside of said hub body, at least one opening in said recess for grease within said hub body to pass therethrough, and means in said recess to close said opening while permitting the controlled discharge of grease therethrough so that when grease is introduced under pressure to said hub body some grease will pass through said opening when said inner and outer bearing assemblies are greased.

A system of lubricating a hub assembly, said hub assembly including a spindle having an inner end attachable to an axle and an outer free end, inner and outer bearing assemblies spaced along said spindle, an enclosure over the outer free end of said spindle, a hub body around said spindle and rotatable on said bearings to form with said enclosure a lubrication chamber, and a wheel mounting flange extending radially outwardly of said hub body and having lug bolts extending axially outwardly therefrom;

• the system comprising a grease fitting mounted at the outer side of at least one of said lug bolts, an axial bore through said one of said lug bolts communicating with said grease fitting, means connected to the inner side of said one of said lug bolts to transfer grease to a location internally of said lubrication chamber, and at least one opening in said lubrication chamber through which grease may pass to indicate a complete greasing of said lubrication chamber.