Title: Rebound control for energy absorber unit

Abstract: The bumper assembly of a vehicle is supported by a pair of energy absorber units each of which incorporates a piston assembly which strokes in an inner cylinder to force gas from an inner chamber to a gas spring chamber through an expansible and contractable control chamber controlled by one-way valves and bleed orifices. On the return stroke, compressed gas in the control chamber exerts a force opposing the gas spring return force exerted on the piston assembly. Gas in the control chamber meters through the bleed orifices into the inner chamber so that the return rate of the piston assembly is effectively controlled and reduced.

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Inventors: Fannin, Wayne V. (Xenia, OH, US)

Application Number: 526833
Filing Date: 1974-11-25
Publication_date: 1976-01-20
Assignee: General Motors Corporation (Detroit, MI)
Primary Class(es): 293/134 188/322.15, 267/116, 293/137
Other Classes:
US Patent Ref:

2820771	Jun, 1974	Kerr et al.	293/70.
3814219	Jun, 1974	Fannin et al.	267/116.
3820772	Jun, 1974	Kerr et al.	293/85.

Other Refs:
Primary Examiner: Love, John J.
Assistant Examiner:
Attorney: White; Charles R.