Bi-component bushing
AssigneeFreudenberg-NOK General Partnership
InventorsDavid H. Johnson, Patrick T. Kolb
Life of this patent
Estimating the term…
Abstract
A bushing is disclosed with a sleeve. The sleeve member has an inner surface and a cavity. A core member is disposed in the cavity. A pair of elastomeric members are disposed in the cavity. One of the pair of elastomeric members is adjacent to the core. The other of the pair of elastomeric members is adjacent to the inner surface. The one of the pair of elastomeric members has a modulus that is greater than the other of the pair of elastomeric members so that one of said pair of elastomeric members absorbs low frequency vibration and the other of the pair of elastomeric members absorbs high frequency vibration.
Claims20
A bushing for isolating and dampening vibrations comprising:
- a core having an outer surface;
- sleeve surrounding the outer surface of the core, the sleeve having an inner diameter surface and an outer diameter surface;
- a first elastomer having a first surface bonded to the outer surface of the core and a second surface bonded to the inner diameter surface of the sleeve;
- and
- a second elastomer bonded to the outer diameter surface of the sleeve;
- wherein one of the elastomers is formed from rubber and one of the elastomers is formed from a foamed material.
A bracket for absorbing vibrations from a vehicular powertrain, the bracket comprising:
- a body having a cavity with an inner surface;
- a core having an outer surface, the core received within the cavity;
- a sleeve received within the cavity and surrounding the outer surface of the core, the sleeve having an inner diameter surface and an outer diameter surface;
- a first elastomer having a first surface bonded to the outer surface of the core and a second surface bonded to the inner diameter surface of the sleeve;
- and
- a second elastomer having a first surface bonded to the outer diameter surface of the sleeve and a second surface bonded to the inner surface of the cavity;
- wherein one of the elastomers is formed from rubber and one of the elastomers is formed from a foamed material.
A bracket for absorbing vibrations from a vehicular powertrain, the bracket comprising:
- a body having a cavity with an inner surface;
- a core having an outer surface, the core received within the cavity;
- a first elastomer having a surface bonded to the outer surface of the core;
- and
- a second elastomer having a surface bonded to the inner surface of the cavity;
- wherein one of the elastomers is formed from rubber and one of the elastomers is formed from a foamed material.
Dependencies are inferred from the claim text.