Shock absorber for controlling damping force characteristics

Details Shock absorber for controlling damping force characteristics Shock absorber for controlling damping force characteristics

2008-11-21

2011-11-22

Culbreth, Eric (Department: 3616)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Vehicle subsystem or accessory control

C267S002000, C280S005515, C280S124160

Reexamination Certificate

active

08065055

ABSTRACT:
Disclosed herein is a shock absorber capable of controlling damping force characteristics. The shock absorber includes a cylinder filled with an operating fluid, a piston valve disposed inside the cylinder to divide an interior of the cylinder into a first chamber and a second chamber, a piston rod having one end extending outside the cylinder and the other end coupled to the piston valve inside the cylinder, a hollow chamber formed inside the piston rod to communicate with the first and second chambers, a free piston disposed within the hollow chamber to move up and down and to divide the hollow chamber into upper and lower chambers, and a variable part configured to control the damping force characteristics by adjusting a vertical displacement of the free piston.

REFERENCES:
patent: 5360089 (1994-11-01), Nakamura et al.
patent: 57177439 (1982-11-01), None
patent: 58081244 (1983-05-01), None
patent: 5278431 (1993-10-01), None
patent: 5302638 (1993-11-01), None
patent: 6280921 (1994-10-01), None

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