Amplitude controlled orifice valving
Patent 7216747 Issued on May 15, 2007. Estimated Expiration Date: 
October 12, 2025. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
October 12, 2025. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2173574 2785774 3321210 Semi-active damper for vehicles and the like Shock absorber Acceleration sensitive shock absorber Damping valve for shock absorber Adaptive shock damping control Patent #: 6926128 InventorAssigneeApplicationNo. 11248102 filed on 10/12/2005US Classes:188/315, Annular reservoir188/318, And passage venting fluid external to chamber188/322.13, Valve structure or location188/287, Plural, successively encountered apertures188/313, With valve controlling fluid flow between chambers or compartments of the chamber188/275With fluid regulated in response to inertia of valve memberExaminersPrimary: Williams, Thomas J.Attorney, Agent or FirmForeign Patent References
International ClassesF16F 9/10F16F 9/34 AbstractA dual tube shock absorber includes a spool valve located between the upper working chamber and the reserve chamber. The spool valve moves with the piston rod to open and close a flow path between the upper working chamber and the reserve chamber. This provides a low damping characteristic for small movements of the piston rod which changes to a high damping characteristic for larger movement of the piston rod.Field of SearchWith fluid regulated in response to inertia of valve memberHaving aperture in chamber wall With valve controlling fluid flow between chambers or compartments of the chamber With reservoir for fluid Annular reservoir And passage venting fluid external to chamber Valve structure or location Fluid through or around piston within chamber Via fixed or variable orifice in piston Foot valve Tortuous path orifice Plural, successively encountered apertures Having a thrust member with a variable volume chamber (e.g., coaxial or telescoping tubes, compensating reservoir) | |
