| US 7,584,685 B2 | ||
| Active vibrational damper | ||
| Robert J. Crist, Green County, Mo. (US) | ||
| Assigned to Dayco Products, LLC, Miamisburg, Ohio (US) | ||
| Filed on Oct. 20, 2004, as Appl. No. 10/969,887. | ||
| Prior Publication US 2006/0081086 A1, Apr. 20, 2006 | ||
| Int. Cl. F16F 15/30 (2006.01) | ||
| U.S. Cl. 74—574.1 | 22 Claims |
| 1. A vibration damper comprising:
a vibrating element coupled to a rotating shaft for rotational movement therewith;
an annular inertia element having an axially extending slot in an outer face thereof;
a magneto-rheological elastic element interposed between the inertia element and the vibrating element; and
an electromagnet operable to produce a magnetic field across the elastic element when energized;
wherein the inertia element is elastically coupled to the vibrating element by the magneto-rheological elastic element; and
wherein at least one of a portion of the electromagnet, a portion of the magneto-rheological elastic element, or a portion
of the vibrating element is located within the slot in the annular inertia element.
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