Dual spring rate preload module with air adjustment

Details Dual spring rate preload module with air adjustment Dual spring rate preload module with air adjustment

F - Mech Eng,Light,Heat,Weapons

16

F

F16F 13/20 (2006.01) B60G 11/56 (2006.01) F16F 3/07 (2006.01) F16F 13/26 (2006.01)

Patent

CA 2496394

A preload shock absorber assembly includes a shock absorber having a hydraulic cylinder. The cylinder includes a rod slideably supported by a cylinder head having a seal at one end of the hydraulic cylinder. A preload air chamber is arranged radially outwardly of the rod seal to provide a first spring having a spring rate. The pressurized preload air chamber is separated from the rod seal to prevent loss of pressurized from the preload air chamber to the hydraulic cylinder. The pressurized air chamber uses a movable separator that seals the air chamber and isolates the air chamber from the outside environment. A second spring is supported by a seat secured to the hydraulic cylinder outer wall and is arranged between the seat and the separator. A third spring is arranged within the air chamber to supplement the spring rate provided by the pressurized air chamber.

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