Tripot ball with two point contact

Details Tripot ball with two point contact Tripot ball with two point contact

2005-10-25

2008-10-14

Binda, Greg (Department: 3679)

Rotary shafts, gudgeons, housings, and flexible couplings for ro

Coupling accommodates drive between members having...

Tripod coupling

C464S905000

Reexamination Certificate

active

07435181

ABSTRACT:
The universal joint includes an outer joint member having a rotational axis and three guide grooves extending parallel to its rotational axis. The three guide grooves are equally circumferentially spaced about the axis and each has opposed side portions. The universal joint also includes an inner joint member disposed inside the outer member. The inner joint member has a rotational axis and three arms equally spaced about this rotational axis extending radially into the guide grooves of the outer joint member. Each aim carries a roller having an external surface which engages the opposed side portions of the guide groove into which the arm extends. The roller is constrained to roll along the guide groove and each roller being able to rotate about, move lengthwise of, and tilt relative to the arm by which it is carried. The cross-sectional shape of the external surface of each roller is of a truncated arc shape and the cross-sectional shape of each guide groove side portion is different from the truncated arc shape of the roller external surface. The roller external surface and each guide groove side portion have angular contact engagement with one another at two spaced points which lie in the roller external surface and guide groove side portion. A radius of the arcuate shape of the external surface extends from a point at least as close to the roller external surface as a plane centered with respect to said roller along a path extending normal to the external surface.

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