Pneumatically controlled, active hydraulic anti-vibration support

A pneumatically controlled, active hydraulic anti-vibration support, designed to be inserted between two rigid elements and comprising:

• first and second rigid frames designed to be joined respectively to the two rigid elements to be connected,
• an elastomer body linking the two frames to one another and partially delimiting a working chamber filled with liquid,
• a flexible wall, partially delimiting a compensating chamber filled with liquid, which is in turn connected to the working chamber by a throttled passage, also filled with liquid,
• a rigid partition which is joined to the second frame and which partially delimits the working chamber, this rigid partition having a mouthpiece closed off by means of a flexible membrane, this membrane having a first face communicating with the working chamber and a second face isolated from said working chamber,
• a pneumatic chamber partially delimited by the second face of the membrane,
• and at least one solenoid to provide communication between the pneumatic chamber and the atmosphere and with a coupling providing a connection to a pneumatic source, said solenoid being connected to an electrical connector in turn designed to be connected to an electronic control system,
• said anti-vibration support having a single-block, pneumatic actuating unit which incorporates:
• a rigid support block joined to the second frame,
• the solenoid,
• the pneumatic coupling,
• and the electrical connector,
• the support block having an annular flange which partially delimits the pneumatic chamber and this support block being applied against the rigid partition clamping the flexible membrane between said annular flange and said rigid partition, this annular flange being disposed around the mouthpiece of the rigid partition.