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US 2009/0020976 A1Published application
Bushing having high axial spring rate and method of manufacturing
AssigneePullman Incorporated
InventorJeremy D. Weilnau
Life of this patent
Estimating the term…
Abstract
A high axial spring rate spring pivot bushing has an inner metal to which is press fit a ferrule at one end. An outer metal is disposed around the inner metal and an elastomeric bushing is located between the inner metal, the ferrule and the outer metal. The spring pivot bushing is manufactured by pressing the ferrule on the inner metal, placing the inner metal, ferrule and outer metal in a mold and then injecting an elastomeric material to create the elastomeric bushing.
Claims18
A pivot bushing comprising:
- an inner metal defining a through hole;
- a ferrule attached to an outer surface of said inner metal, said ferrule extending radially outward from said inner metal;
- an outer metal disposed over said inner metal, said outer metal including a cylindrical portion surrounding said inner metal and a radially outward extending flange extending generally parallel to said ferrule;
- and
- an elastomeric member bonded to said inner metal, said ferrule, said cylindrical portion of said outer metal and said radially outward extending flange of said outer metal.
2 more elements
A method of manufacturing a pivot bushing comprising:
- providing an inner metal;
- assembling a ferrule to said inner metal;
- placing said inner metal and said ferrule into a mold;
- placing an outer metal into said mold such that the outer metal surrounds the inner metal;
- and
- injecting an elastomeric material between said inner metal and said outer metal through an injection hole defined by said ferrule to form an elastomeric bushing.
3 more elements
Dependencies are inferred from the claim text.