Hybrid contact roller bearing for vacuum pump

Details Hybrid contact roller bearing for vacuum pump Hybrid contact roller bearing for vacuum pump

2005-04-12

2005-04-12

Footland, Lenard A. (Department: 3682)

Bearings

Rotary bearing

Antifriction bearing

Reexamination Certificate

active

06877904

ABSTRACT:
The invention concerns a contact roller bearing for a vacuum pump comprising a rotor roller bearing ring (12) a coaxial stator roller bearing ring (13) between which are provided rolling elements (14a, 14b, 14c, 14d) housed in succession and urged to roll on respective raceways of the rotor (12) and stator (13) roller bearing rings. The rolling elements comprise an alternating succession of rolling elements (14a, 14c) whereof the outer surface is made of steel and of rolling elements (14b, 14d) whereof the outer surface is made of ceramic, thereby reducing the resistance to acceleration of the contact roller bearing, which limits the friction and wear of the inner annular surface (16) of the contact roller and the corresponding bearing of the rotor.

REFERENCES:
patent: 19729450 (1999-02-01), None
patent: 0 711 929 (1996-05-01), None
patent: 1 540 168 (1968-09-01), None

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