Method for manufacturing a bearing structure of a wiper arm

Details Method for manufacturing a bearing structure of a wiper arm Method for manufacturing a bearing structure of a wiper arm

1993-01-12

1994-06-14

Rosenbaum, Mark

Metal working

Method of mechanical manufacture

Process for making bearing or component thereof

29898054, 2989812, 2989813, 419 28, 384295, 384297, 1525031, F16C 3300, B22F 324

Patent

active

053198514

ABSTRACT:
A method for manufacturing a bearing for a wiper arm structure includes the steps of: a) forming the bearing by sintering so that the outer peripheral surface of the bearing includes rough sintered surfaces of protruding ridges and recessed portion; b) sizing only the sintered surfaces of the protruding ridges without processing the recessing portions to smooth only outer peripheral surfaces of the protruding ridges so that the outer peripheral surfaces define a circular cross-section for the bearing, the sintered surfaces of the recessed portions remaining in a rough sintered condition relative to the outer peripheral surfaces of the protruding ridges which are sizing-processed; and c) forming a resin material on the outer peripheral surface of the bearing by insert molding. The rough sintered surfaces of the recessed portions provide increased adhesion between the recessed portions and the resin material relative to adhesion between the resin material and the smooth and circular outer peripheral surfaces of the protruding ridges.

REFERENCES:
patent: 1158862 (1915-11-01), Sanford
patent: 1331961 (1920-02-01), Klocke
patent: 1460515 (1923-07-01), Selker
patent: 1652468 (1927-12-01), Catlin
patent: 3099030 (1963-07-01), Zury
patent: 3188679 (1965-06-01), Wubbe
patent: 4125637 (1978-11-01), Tanner
patent: 4393563 (1983-07-01), Smith
patent: 4774749 (1988-10-01), Furumura
patent: 4932097 (1990-06-01), Kobayashi et al.

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