Roush Anatrol, Inc.

Other

Material Sciences Corporation

Arco Chemical Company

Material Sciences Corporation, Engineered Materials and Solutions Group, Inc.

Ahid D Nashif

Gopichand Koganti

Gregory Pardus

Kevin W Griffey

Edwin F Aquino

Angela L Brant

A vibration damping laminate includes a magnetic layer and an uncoated constraining layer joined by a viscoelastic layer, wherein the modulus of elasticity of the viscoelastic layer is substantially less than that of either of the other two layers. The laminate is magnetically attached to an associated source of vibrations by the magnetic layer, and substantially all vibrational damping is effected by the viscoelastic layer.

Magnetic damping

There is provided a vibration damping structure having an inner metal skin and an outer metal skin and a damping layer secured between the metal skins, with each of said metal skins having a cut therein. The damping layer is a viscoelastic material which is capable of adhering to the metal skins. The cuts are circular, encompassing and isolating an area wherein the vibration damping structure is connected to another body. The cuts extend through the inner metal skin and the outer metal skin to the damping layer.

Vibration damping laminate with vibration isolating cut therein

A multi-mode vibration absorbing device for implements includes a base member and a mass mounted to the base member and cantilevered relative thereto. The multi-mode vibration absorbing device is tuned such that it vibrates at the same frequency as the implement but out of phase therewith.

Multi-mode vibration absorbing device for implements

A vibration damping device for stringed racquets includes a viscoelastic member adapted to be wrapped around at least a pair of strings of the racquet and a moveable member extending through the viscoelastic member moveable relative to the viscoelastic member in response to vibrations induced by an impact on the strings of the racquet such that the vibration damping device vibrates over the same frequency range but out of phase with the racquet to damp vibrations in the racquet.

Vibration damping device for stringed racquets

A golf club having a vibration damping device including a club head, a shaft connected to the club head having resonant frequencies over a predetermined range and a rod disposed within the shaft with a viscoelastic material interposed between the shaft and the rod. The rod is flexible and has resonant frequencies over the same frequency range as the shaft such that the shaft and rod vibrate out of phase with respect to each other and thereby deform the viscoelastic material to damp vibrations in the shaft.

Golf club having vibration damping device and method for making same

A vibration damping device for sporting implements includes a base member and a mass mounted to the base member and cantilevered relative thereto, the device is tuned such that it vibrates at the same frequency as the sporting implement but out of phase therewith.

Vibration damping device for sporting implements

A vibration damping device for stringed racquets including a viscoelastic member adapted to be mounted between strings of the racquet and at least one movable member carried on the viscoelastic member. The movable member is movable relative to the viscoelastic member in response to vibrations induced by an impact on the strings of the racquet such that the vibration damping device vibrates over the same frequency range but out of phase with the racquet to dampen vibrations in the racquet.

Noise of a vehicular fuel pump is reduced by determining the major frequency range of the objectionable noise and the deformation patterns of vibrating elements of the pump, and providing a passive vibrator which has designed mass, stiffness and damping values that cause it to resonate in the major frequency range and to provide an out-of-phase reaction force which is of sufficient magnitude to offset the undesired vibration. The passive vibrator may be mounted on the pressure or return line of the pump.

Apparatus and method for reducing vehicular fuel pump noise

The acoustical performance of automotive trim panels is improved, especially with respect to noise generated by structural vibration of an automobile and synchronous vibration of the trim panel itself, by positioning a dead, vibration-damping, foam material between the automobile frame and a semi-flexible support layer of the trim panel, the trim panel also including an open-celled, flexible, airborne sound-absorbing foam layer bonded to the opposing face of the support layer, and wherein the dead foam material has a substantially lower resilience value and a substantially higher recovery rate than the open-celled foam layer.

Growing community of inventors

Cincinnati, OH, United States of America

Ahid D Nashif