Land vehicles – Suspension modification enacted during travel – Suspension stiffness for ride comfort
Reexamination Certificate
2005-09-01
2009-02-17
Culbreth, Eric (Department: 3616)
Land vehicles
Suspension modification enacted during travel
Suspension stiffness for ride comfort
C280S006150, C280S006153, C180S041000
Reexamination Certificate
active
07490836
ABSTRACT:
The control includes a fluid system having a fluid passage in connection with a rod end chamber and a piston end chamber of a fluid cylinder connected to the front axle and a front end of a vehicle and extendible in length for increasing a distance between the front axle and the front end, a progressive control valve is disposed in the passage and is controllably movable through a range of progressively more restrictive partially open positions. The valve can also have a one-way flow position to allow fluid flow only from the piston end chamber to the rod end chamber, to allow only retraction of the cylinder. A controller is automatically operable for causing the valve to move through the range of progressively more restrictive partially open positions as the fluid cylinder is increasingly extended, and for moving the valve to the one-way flow position when the cylinder reaches a predetermined length. Operation of the control can be enabled by actuation of a drive for the front axle, such as mechanical front drive.
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Guo Haibo
Hou Yanming
Thannikary James
CNH America LLC
Culbreth Eric
Harms Michael G.
Sheldrake Patrick M.
Stader John William
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