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US 7,000,910 B2Granted
Suspension unit
AssigneeDelta Tooling Co., Ltd.
InventorHiroki Oshimo
Life of this patent
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Abstract
A suspension unit includes a lower frame and an upper frame vertically movably mounted on the lower frame via a link mechanism. The suspension unit also includes a magneto-spring unit for resiliently supporting the upper frame relative to the link mechanism. The amount of motion of the magneto-spring unit is smaller than that of the suspension unit, making it possible to provide a relatively compact suspension unit having a large stroke.
Claims1
A suspension unit comprising:
- a lower frame;
- an upper frame vertically movably mounted on the lower frame;
- a link mechanism for connecting the lower frame and the upper frame;
- a magneto-spring unit for resiliently supporting the upper frame relative to the link mechanism;
- and
- a plurality of metal springs having opposite ends hooked on the upper frame and a portion of the link mechanism, respectively,
- wherein the link mechanism comprises a first torsion bar that produces a lifting force of the upper frame,
- wherein a second torsion bar is mounted on the upper frame and a contact plate secured to a portion of the link mechanism, and
- wherein when a displacement of the upper frame relative to the lower frame is greater than a predetermined value, the second torsion bar impinges on the contact plate to thereby produce a lifting force of the upper frame.
6 more elements
Dependencies are inferred from the claim text.