Bearing assembly

Details Bearing assembly Bearing assembly

2005-02-15

2005-02-15

Hannon, Thomas R. (Department: 3682)

Bearings

Rotary bearing

Plain bearing

C384S907100

Reexamination Certificate

active

06854890

ABSTRACT:
A bearing assembly includes a generally cylindrical main unit (10) made of ceramic material, and two blocks (30) made of sintered metallic material housed in the main unit. The main unit includes a cylindrical sleeve (12), and two opposite protrusions (14) arranged inside the sleeve. Each protrusion defines an inmost first support wall (20), and a through hole (24) that is narrow at a middle portion and flared at opposite ends. A slit (26) is defined in the protrusion between the first support wall and the through hole. The blocks are received in two corresponding cavities (18) defined between the protrusions. Each block defines an inmost second support wall (36). The first and second support walls cooperatively define a bearing bore (22) therebetween for receiving a rotatable shaft. The blocks have good lubricant-retaining characteristics. The highly rigid protrusions can accurately hold the shaft and protect the blocks from excessive abrasion.

REFERENCES:
patent: 1234853 (1917-07-01), Bache
patent: 2086787 (1937-07-01), Whiteley
patent: 4290655 (1981-09-01), Apuzzo et al.
patent: 5028148 (1991-07-01), Kanamaru et al.
patent: 5549394 (1996-08-01), Nowak et al.

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