Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Reexamination Certificate
2007-01-23
2007-01-23
Seidleok, James J. (Department: 1711)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
C525S331700, C525S332500, C428S344000, C428S3550RA, C428S416000
Reexamination Certificate
active
10815132
ABSTRACT:
A torsional vibration damper or other vibration damping device with a rubber vibration absorbing element. The rubber element is a peroxide-cured composition comprising 100 parts of ethylene-alpha-olefin elastomer, and 20 to 100 parts of substantially isobutylene or butene polymer having a viscosity average molecular weight greater than about 5000. The polymer may also be a copolymer of isobutylene and isoprene. The addition of the isobutylene polymer to the ethylene-alpha-olefin elastomer composition increases the vibration damping character of the rubber.
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“Low Modulus, High Damping, High Fatigue Life Elastomer Compounds for Vibration Isolation”, Marvin A. Lemieux and Paul C. Killgoar, Jr., Rubber Chemistry and Technology, vol. 57, No. 4, Sep.-Oct. 1984, pp. 792-803.
Dunlap Paul N.
South Bobbie E.
Asinovsky Olga
Castleman, Esq. C.H.
Dunlap, Esq. P.N.
Seidleok James J.
The Gates Corporation
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