Composite leaf spring

Details Composite leaf spring Composite leaf spring

1982-04-23

1984-08-28

Reger, Duane A.

Spring devices

Vehicle

Leaf

188268, F16F 122

Patent

active

044680147

ABSTRACT:
A composite leaf spring for use in a vehicle suspension system having a pair of metal outer skins and a stiff plastic core bonded between the skins. The core can be made of any one of a variety of filled or unfilled polymers which has a relatively high shearing strength and sufficiently isotropic properties so as to handle stresses in all directions. An important aspect of the invention is that it provides for a simple and inexpensive method for manufacturing a contoured composite leaf spring which includes the steps of first positioning the skins in a spaced relation within a female mold and then pouring or injecting the core material into the space between the skins. Preferably, the skins are of uniform width and thickness to reduce manufacturing costs. In most common vehicle applications, the spring would have a point of maximum thickness in the central section where the bending moment is greatest and would be tapered toward each end. The spring skins should meet the following criterion:

REFERENCES:
patent: 2969971 (1961-01-01), Nelson
patent: 3053527 (1962-09-01), Hallam
patent: 3172650 (1965-03-01), Jarret et al.
patent: 3204944 (1965-09-01), Brownyer
patent: 3276762 (1966-10-01), Thomas
patent: 3376033 (1968-04-01), Sherwood
patent: 3586307 (1971-06-01), Brownyer

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