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US 4,721,142 AGranted
Rim & lock ring
AssigneeDresser Industries, Inc.
InventorWilliam C. Foster
Life of this patent
Estimating the term…
Abstract
A rim construction for mounting a tire which has a base member in which a groove or gutter has been machined to a fine tolerance. A lock ring with a semicircular projection is formed by cold extruding steel to a matching fine tolerance of the gutter so that when the lock ring semicircular portion or projection is place in the gutter, uniform maximum engagement occurs between the gutter surface and the semicircular lock ring projection surface.
Claims11
A method of forming a rim construction for mounting a tire comprising the steps of:
- a. forming a base member,
- b. machining an annular groove in said base member to a predetermined fine tolerance and cross-section,
- c. forming an annular bead seat ring with a radially and outwardly extending flanged portion having a chamfered outer edge surface,
- d. positioning said annular bead seat ring over said base member,
- e. cold extruding an annular lock ring with a projection having a cross-section fine tolerance corresponding to said groove cross-section fine tolerance,
- f. integrally forming a lip extending outwardly from said annular lock ring to prevent twisting of said lock ring, and
- g. positioning said lock ring projection in uniform engagement with said machined groove with a surface on said lock ring matching and abutting said chamfered outer edge surface of said annular bead seat ring.
4 more elements
A method of forming a rim construction for mounting a tire comprising the steps of:
- a. forming a base member,
- b. matching an annular groove in said base member to a predetermined fine tolerance and cross-section,
- c. forming an annular bead seat ring with a radially and outwardly extending flanged portion having a chamfered outer edge surface,
- d. positioning said annular bead seat ring over said base member,
- e. cold forming an annular lock ring with a projection having a cross-section fine tolerance corresponding to said groove cross-section fine tolerance,
- f. integrally forming a lip extending outwardly from said annular lock ring to prevent twisting of said lock ring, and
- g. positioning said lock ring projection in uniform engagement with said machined groove with a surface on said lock ring matching and abutting said chamfered outer edge surface of said annular bead seat ring.
4 more elements
Dependencies are inferred from the claim text.