Method of fabricating a chain link assembly having bushes each p

Details Method of fabricating a chain link assembly having bushes each p Method of fabricating a chain link assembly having bushes each p

Filed on

1996-03-08

Date issued

1998-05-05

Examiner

Hughes, S. Thomas

Patent Class

Metal working

SubClass

Method of mechanical manufacture

SubSubClass

Assembling or joining

Other Related Categories

29525, 29898059, 59 8, 264266, 264269, B23D 1100, B21L 900

Type

Patent

Status

active

Patent number

057459746

Description

ABSTRACT:
The present invention improves the durability of a plastic sleeve formed integrally with a bush on the inner circumference of the bush. A method of fabricating a chain link assembly deforms a bush (1) set in a mold (2) into the same barrel-like shape as that of the bush (1) in the chain link assembly, injects a molten plastic into the mold to form a plastic sleeve (8) on the inner surface of the bush (1), and unites the bushes (1) respectively provided with the plastic sleeves (8) with chain link plates so that the internal stress induced in the sleeves (8) is removed.

REFERENCES:
patent: 1578271 (1926-03-01), Dull et al.
patent: 3049933 (1962-08-01), Besel et al.
patent: 3608049 (1971-09-01), Tavella
patent: 4774749 (1988-10-01), Furumura
patent: 4926529 (1990-05-01), Hosmer et al.
patent: 5667442 (1997-09-01), Tanaka

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