Land vehicles – Suspension modification enacted during travel – Riding or suspension height
Reexamination Certificate
2009-02-04
2011-11-01
Ilan, Ruth (Department: 3616)
Land vehicles
Suspension modification enacted during travel
Riding or suspension height
C280S006159, C280S124160, C267S064280, C137S625210
Reexamination Certificate
active
08047551
ABSTRACT:
A multi-stage height control valve for a pneumatic control system of a vehicle includes an air reservoir port, an exhaust port, an air spring port and a pilot port operatively connected to a rotor valve which is in turn operatively connected to the vehicle. The air reservoir port fluidly communicates with an air tank. The air spring port fluidly communicates with the air springs of the vehicle. The exhaust port opens to atmosphere. The pilot port fluidly communicates with a control/warning device such that, when a secondary ride height is reached by the vehicle, the pilot port signals the control/warning device in order to maintain the vehicle at the secondary ride height. The pilot port alternatively provides an air pressure boost in order to quickly re-inflate the air springs of the vehicle to return the vehicle to the primary design ride height.
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Cervantez Jesse W.
Morris Brian R.
Dureska David P.
Frisby Keith
Hendrickson USA L.L.C.
Ilan Ruth
Krugliak, Wilkins, Griffiths & Dougherty Co., L.P.A.
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