US 4,398,329 AGranted

Roller skate bearing

AssigneeVirginia Industries, Inc.

InventorsJohn A. Hitchner, Henry A. Klipp

Life of this patent

Estimating the term…

Abstract

An unground ball bearing is manufactured by forming a straight-sided cup shaped outer race having an aperture in the base and a radially inwardly extending flange about the periphery of the cup rim. The outer and inner races are heat treated and subjected to a surface finishing step and the ball bearing is subsequently assembled by inserting the balls within the outer race and then snapping the inner race into position within the outer race by forcing it past the flange on the outer race.

Claims8

Dependent claims

A method of manufacturing a ball bearing comprising the steps of:

forming a round cup-shaped member having a flat side wall portion and a base portion from metal stock, the base portion being partly transversely oriented with respect to said flat side wall portion;
scoring the inner surface of the formed cup-shaped member adjacent the upper periphery thereof to define a groove therein;
bending the peripheral portion of the cup-shaped member inwardly along the groove to form a radially inwardly extending flange, said flange defining a circular opening;
forming an opening in the base of the cup-shaped member, said opening being coaxial with said flange-defined opening, the axis of said opening being parallel to the straight portion of the side wall of said cup-shaped member, said cup-shaped member with coaxial openings comprising an outer race defining member;
producing an inner race defining member having a flat circular body of a diameter slightly greater than the diameter of the flange defined opening in the outer race defining member, said inner race defining member further having a tubular projection extending from the central region of said flat body, said tubular projection being open at the end disposed away from said flat body and being coaxial with said flat body;
heat treating the inner and outer race defining members;
finishing the surfaces of the inner and outer race defining members supporting the outer race defining member;
temporarily inserting a post within the outer race defining member, said post being coaxial with the outer race defining member;
positioning a discreet number of balls within the outer race defining member about the post;
inserting the tubular projection of the inner race defining member into said outer race defining member whereby said tubular projection contacts the balls and prevents travel thereof in the radially inward direction;
and
exerting pressure upon said inner race defining member to cause said inner race defining member flat body to snap through said flange defined opening of said outer race defining member.

9 more elements

Dependencies are inferred from the claim text.

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Abstract

A method of manufacturing a ball bearing comprising the steps of:

forming a round cup-shaped member having a flat side wall portion and a base portion from metal stock, the base portion being partly transversely oriented with respect to said flat side wall portion;
scoring the inner surface of the formed cup-shaped member adjacent the upper periphery thereof to define a groove therein;
bending the peripheral portion of the cup-shaped member inwardly along the groove to form a radially inwardly extending flange, said flange defining a circular opening;
forming an opening in the base of the cup-shaped member, said opening being coaxial with said flange-defined opening, the axis of said opening being parallel to the straight portion of the side wall of said cup-shaped member, said cup-shaped member with coaxial openings comprising an outer race defining member;
producing an inner race defining member having a flat circular body of a diameter slightly greater than the diameter of the flange defined opening in the outer race defining member, said inner race defining member further having a tubular projection extending from the central region of said flat body, said tubular projection being open at the end disposed away from said flat body and being coaxial with said flat body;
heat treating the inner and outer race defining members;
finishing the surfaces of the inner and outer race defining members supporting the outer race defining member;
temporarily inserting a post within the outer race defining member, said post being coaxial with the outer race defining member;
positioning a discreet number of balls within the outer race defining member about the post;
inserting the tubular projection of the inner race defining member into said outer race defining member whereby said tubular projection contacts the balls and prevents travel thereof in the radially inward direction;
and
exerting pressure upon said inner race defining member to cause said inner race defining member flat body to snap through said flange defined opening of said outer race defining member.

9 more elements