Vibration isolating bushing and its manufacturing method

Details Vibration isolating bushing and its manufacturing method Vibration isolating bushing and its manufacturing method

2001-07-11

2008-01-29

Bryant, David P. (Department: 3726)

Metal working

Method of mechanical manufacture

Assembling or joining

C029S465000, C029S512000, C029S515000, C029S898057, C072S084000, C072S112000

Reexamination Certificate

active

07322091

ABSTRACT:
This invention relates to a vibration isolating bushing, for example, built into a suspension system, an inside diameter of one edge (4) of an inner cylinder (1) being made larger than that of the other edge (6). The outside diameter of the thinner edge (4) is enlarged by applying pressure with a pressure forming jig (26) to the thicker edge surface (25), with the thinner edge surface (20) of the inner cylinder (1) abutted on a base (23). After completion of enlargement of the outside diameter of the thinner edge (4), the outside diameter of the thicker edge (6) is enlarged by further pressure with the pressure forming jig (26), this process thus capable of enlarging the outside diameter of both edges (4), (6) with one continuous working step. Surface unit pressure applied by another member can be made smaller by enlarging the outside diameter of the thinner edge (4), and the outer cylinder (2) can be prevented from being slipping out from the inner cylinder through the enlargement of the outside diameter of the thicker edge (6).

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