4-point contact ball bearing

Details 4-point contact ball bearing 4-point contact ball bearing

2005-01-04

2005-01-04

Hannon, Thomas R. (Department: 3682)

Bearings

Rotary bearing

Antifriction bearing

C029S898060

Reexamination Certificate

active

06837623

ABSTRACT:
A 4-point contact ball bearing includes four ring-shaped contact surfaces for forming a ring-shaped raceway between them, each ring-shaped contact surface has a sectional profile defined by a concave curve when cut along a plane including a central axis of rotation of each ball and a central axis of rotation of the ring-shaped raceway. The concave curve is shaped so that it circumscribes the balls and that a curvature thereof is largest at a ball-contact point and is gradually decreased moving away from the ball-contact point. By defining such raceway surfaces, fluctuations in the contact points between the balls and the raceway surfaces due to machining errors can be suppressed, rotational slipping of the balls can be reduced, and differential slip between the balls and the raceway surfaces can also be reduced.

REFERENCES:
patent: 1587184 (1926-06-01), Riebe
patent: 2142474 (1939-01-01), Langhaar
patent: 3370899 (1968-02-01), Eklund
patent: 3670462 (1972-06-01), Robinson
patent: 4334721 (1982-06-01), Satoh et al.
patent: 4565457 (1986-01-01), Flander
patent: 4664535 (1987-05-01), Mottate
patent: 6116786 (2000-09-01), Takata et al.
patent: 848 435 (1939-10-01), None
patent: 2 801 944 (2001-06-01), None
patent: 60 026816 (1985-06-01), None

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