Negative stiffness apparatus
AssigneeGM Global Technology Operations LLC
InventorsDvir Brand, Avshalom Suissa, Alon Capua
Life of this patent
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Abstract
A negative stiffness apparatus includes a fluid filled bellows interposed between a first surface and a second surface wherein the bellows and the first and second surfaces have an orientation of substantial equilibrium between the first and second surfaces. The bellows and the first and second surfaces include other orientations wherein the first and second surfaces are displaced from the orientation of substantial equilibrium and the bellows exerts a displacement force to urge the first and second surfaces further away from the orientation of substantial equilibrium.
Claims17
A negative stiffness apparatus, comprising:
- a fluid filled bellows interposed between a first surface and a second surface wherein the bellows and the first and second surfaces include an orientation of substantial equilibrium between the first and second surfaces and wherein the bellows and the first and second surfaces include other orientations wherein the first and second surfaces are displaced from the orientation of substantial equilibrium and the bellows exerts a displacement force to urge the first and second surfaces further away from the orientation of substantial equilibrium.
A negative stiffness apparatus, comprising:
- an elongated inner member aligned lengthwise along an axis of linear motion comprising opposite ends and an outer surface;
- an elongated outer member aligned lengthwise along the axis of linear motion comprising opposite ends and an inner surface outwardly flared toward at least one end, said outer member surrounding said inner member in spaced adjacency;
- and
- a flexible, toroidal fluid enclosure comprising an outer wall and an inner wall, said enclosure interposed between the outer surface of the inner member and the inner surface of the outer member such that the outer wall is in conformal contact with the inner surface of the outer guide and the inner wall is in conformal contact with the outer surface of the inner member, and wherein said outer wall is fixedly attached to said inner surface of the outer member and said inner wall is fixedly attached to said outer surface of said inner member.
Dependencies are inferred from the claim text.