Resources Contact Us Home
Bearing assembly for an ultra quiet electric motor

Image Number 10 for United States Patent #5917258.

A high speed electric motor for automotive applications that is designed to effectively minimize vibration of its component parts and thus suppress noise generated during its operation. The motor incorporates acoustic engineering principles including surface vibration control, acoustic radiation efficiency, active intensity field control and noise control using acoustic materials to reduce overall vibration of the motor components and the motor noise sensed by the passenger of the vehicle. In one aspect, a bearing assembly for an electric motor is disclosed. The electric motor is of the type including a housing defining an internal chamber, an armature disposed within the internal chamber and having a rotatable shaft, and magnet means for inducing rotational movement of the armature shaft. The bearing assembly includes a bearing member for supporting the armature shaft for rotational movement and a bearing housing defining an internal bore that accommodates at least a portion of the bearing member. The bearing housing may comprise a vibration energy absorbing material, and is dimensioned such that an inner wall portion of the bearing housing defining the internal bore is in contacting engagement with an outer surface of the bearing member to facilitate absorption of vibration energy from the bearing member.

  Recently Added Patents
Deceleration dependent shift control
Bipolar junction transistor with a self-aligned emitter and base
Vacuum cleaner filter adapter ring
Method and system for automatically hiding irrelevant parts of hierarchical structures in computer user interfaces
Packet bundling at the PDCP layer
Methods for isolating ligands of the human bitter taste receptor TAS2R49
Multilayered material sheet and process for its preparation
  Randomly Featured Patents
Devices and systems with parallel logic unit, and methods notice
Polymer blends with improved hydrolytic stability
Vehicle outer handle system
Diet and activity-monitoring device
Method of manufacturing a fuel cell assembly
Aircraft brake disk stack glove
Method of producing epoxy resins by gas phase epoxidation
Notebook computer
Method and apparatus for burning green wood chips
Wave configuration of a pipe-type lamp