Bearings – Rotary bearing – Antifriction bearing
Patent
1998-02-23
2000-01-04
Footland, Lenard A.
Bearings
Rotary bearing
Antifriction bearing
384492, 384528, 384531, 384913, F16C 3356
Patent
active
060102489
ABSTRACT:
The present invention is intended to provide a pressed retainer which can meet requirements for operation at high temperature and high speed, can sufficiently retain lubricant, does not allow ceramic balls, if used, to cut away track surfaces and is superior in wear resistance, and also intended to provide a ball bearing comprising the pressed retainer.
In order to solve problems, in the pressed retainer, wherein two ring-shaped retainer plates, having ball retaining portions and flat portions at predetermined intervals in the circumferential direction thereof, are combined to face with each other so as to form pockets for accommodating balls, a first spherical concave portion and a second spherical concave portion having a curvature radius smaller than that of the first spherical concave portion are formed at the ball retaining portions, and a nitrided layer is formed on the surfaces of the ring-shaped retainer plates. The ball bearing of the present invention uses the pressed retainer and ceramic balls.
REFERENCES:
patent: 1494012 (1924-05-01), Parsons
patent: 4958946 (1990-09-01), Voll
patent: 5044783 (1991-09-01), Willner
Patent Abstracts of Japan, JP 06049623, vol. 018, No. 285, Feb. 22, 1994.
Ito Ikuo
Kajihara Kazuhisa
Ueno Hiroshi
Footland Lenard A.
Koyo Seiko Co. Ltd.
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