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
Group control method for machine type communication and mobile communication system using the method
Optical coherence tomography with multiple sample arms
Methods and apparatus for mitigating interference between co-located collaborating radios
Pre-distortion architecture for compensating non-linear effects
Systems and methods for generating a user profile based customized media guide with user-generated content and non-user-generated content
Clock phase recovery apparatus
Die packages and systems having the die packages
  Randomly Featured Patents
Method and device for protecting starters from fault currents
Cleaning robot
High power, high luminous flux light emitting diode and method of making same
Adsorption of gases by amine complexed Mn (II)
Hardware press and punch apparatus
Combined vehicle model and micro sound chip for a cap
Vehicle slip control apparatus
Color detection system for detecting reservoir presence and content in device
Rail fastening for points of railway tracks
Band indicative segmented tuning bar display