Controllable anti-vibration mounting, notably for motor vehicles

A controllable hydraulic bearing, comprising:

• a housing defining a working chamber space and an equalizing chamber space disposed annularly around said working chamber space;
• a spiral wrapped element disposed in said housing between said working chamber space and said equalizing chamber space, said spiral wrapped element being fully closed in axial directions of the bearing and cooperating with said housing to delimit said equalizing chamber space to form the equalizing chamber and disposed annularly around said working chamber space to form the working chamber, said working chamber and said equalizing chamber being filled with an electrorheological fluid, said spiral wrapped element forming an overflow channel extending in spiral, with a longitudinal extension, between said working chamber and said equalizing chamber, said element comprising an electrically insulating carrier layer provided on both sides with conductive cover layers to form electrodes;
• and
• two mutually opposite electrodes associated with said overflow channel, said two mutually opposite electrodes for generating a high-voltage field in the overflow channel.

A controllable hydraulic bearing, comprising:

• a housing containing an electrorheological fluid, said housing having a working chamber for said electrorheological fluid, said working chamber being partially defined by a elastomer wall and an insulating plate attached to said elastomer wall and partially defined by a bottom plate, and said housing having an equalizing chamber for said electrorheological fluid located partially surrounding said working chamber, said equalizing chamber being partially defined by a diaphragm;
• a spiral element formed of a tape shaped carrier layer spiraling for more than 1 spiral revolution along a length of said tape shaped carrier layer, said carrier layer spiral having a gap between successive layers of said spiral, said gap along with said insulating plate and said bottom plate forming a channel, said channel being fully closed in axial directions of the bearing, and receiving said electrorheological fluid for providing fluid connection between a radially interior region of said spiral element partially defining said working chamber and a radially exterior region of said spiral element partially defining said equalizing chamber, edges of said tape shaped carrier layer of said spiral element engaging spiral grooves in both said insulating plate and said bottom plate;
• and
• two electrodes disposed on opposite faces of said tape shaped carrier layer of said spiral element, said two electrodes being electrically insulated from each other by said carrier layer, said two electrodes at least partially forming opposing surfaces of said channel, each of said two electrodes having electrical contacts for making electrical connections to said electrodes, said electrodes providing an electrical potential across said channel when oppositely electrically charged, said electrical potential across said channel acting on said electrorheological fluid in said channel to effect a viscosity of said electrorheological fluid flowable between said working and said equalizing chambers.