High strength roller chain
OwnerRobert N. Barton, John A. Wrightinventors
Life of this patent
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Abstract
The present invention relates to a high strength roller chain adapted for both high cyclic loads as well as intermittent high shock loads. The roller chain of the present invention includes a pin link plate having a cross sectional area through a center line of a pin receiving aperture greater than a pin link plate in a standard ANSI of an equivalent size roller chain. Further, the cross sectional area of the roller link plate through center line of one of the bushing-receiving openings is greater than that of a roller link plate in a standard ANSI roller link plate in an equivalent size roller chain. Further, the pin itself has a greater cross sectional area than the pin of a standard ANSI equivalent size roller chain.
Claims13
A roller chain comprising
- a plurality of pin link plates, each of said pin link plates having a first and a second circular pin-receiving aperture,
- a plurality of roller link plates, each of said roller link plates having a first and a second circular bushing-receiving aperture,
- a plurality of generally cylindrical elongated pins,
- a plurality of generally cylindrical elongated bushings each having an axial pin-receiving opening,
- said roller chain being assembled such that each of said pins extends through said axial pin receiving opening in one of said bushings in a free rotating manner and each of said bushings in turn extends through said axial bushing-receiving opening in one of said rollers in a free rotating manner, said roller chain further being assembled such that each of said pins has a pair of ends extending through one of said circular bushing-receiving apertures in a pair of longitudinally aligned and laterally spaced roller link plates, with each of said ends of said pins being securely fitted within one of said pin receiving apertures in a pair of longitudinally aligned and laterally spaced pin link plates,
- said roller chain further being assembled such that each of said bushings has a pair of ends each of which is securely fitted within one of said bushing-receiving apertures in a pair of longitudinally aligned and laterally spaced bushing link plates,
- said roller chain further being assembled such that each of said bushings extends through one of said axial bushing-receiving openings in one of said rollers such that said roller is free to rotate with respect to said bushing,
- said roller chain further being assembled such that each of said pins extends through one of said axial pin-receiving openings in one of said bushings such that said pin is free to rotate with respect to said bushings,
- wherein a cross sectional area of said pin link plate is defined as the area of a cross section of one of said pin link plates vertically cut through a center line of one of said first or second pin-receiving apertures excluding the area of said pin-receiving aperture and wherein by increasing said pin link plate in height such that said cross sectional area of said pin link plate is about 12 percent greater than a standard ANSI pin link plate of an equivalent size roller chain,
- and wherein a cross sectional area of said roller link plate is defined as the area of a cross section of one of said roller link plates vertically cut through a center line of one of said first or second bushing-receiving apertures excluding the area of said bushing-receiving aperture and wherein by increasing said roller link plate in thickness such that said cross sectional area of said roller link plate is about 17 percent greater than a standard ANSI roller link plate of an equivalent size roller chain.
A method of increasing the tensile strength of an ANSI standard roller chain
- comprising increasing the cross sectional area of each pin link plate to about 12 percent greater than the cross sectional area of a standard ANSI pin link plate of an equivalent size roller chain,
- and increasing the cross sectional area of each roller link plate to about 17 percent greater than the cross sectional area of a standard ANSI roller link plate of an equivalent size roller chain
- while keeping the outside dimensions of said roller chain to those of a standard ANSI roller chain of an equivalent size.
Dependencies are inferred from the claim text.