Energy absorbing steering column

Details Energy absorbing steering column Energy absorbing steering column

1988-12-19

1989-09-19

Brittain, James R.

Machine element or mechanism

Control lever and linkage systems

Hand operated

280777, B62D 118

Patent

active

048670030

ABSTRACT:
A collapsible, energy absorbing steering column with staged energy absorption. A sleeve around a lower mast jacket of the column has a primary part in the annulus defined by the overlap between the lower mast jacket and an upper mast jacket of the column and a secondary part outside the annulus. A plurality of primary roll deforming steel balls in interference in the annulus are also loosely received in pockets in the sleeve primary part. A plurality of secondary roll deforming steel balls are loosely received in the sleeve secondary part outside the annulus and held on the sleeve by a strippable retainer. When the column collapses, the secondary roll deforming steel balls enter the axially expanding overlap between the mast jackets to increase the level of energy absorption.

REFERENCES:
patent: 3392599 (1968-07-01), White
patent: 3590655 (1971-07-01), Farrell et al.
patent: 3748922 (1973-07-01), Farrell
patent: 3788148 (1974-01-01), Connell et al.
patent: 3877319 (1975-04-01), Cooper
patent: 4006647 (1977-02-01), Oonuma et al.
patent: 4028961 (1977-06-01), Utsumi et al.
patent: 4445708 (1984-05-01), Oakes et al.
patent: 4774851 (1988-10-01), Iwanami et al.

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