Apparatus for tightening or loosening fasteners

An apparatus for tightening or loosening fasteners including:

• a first and a second receiving member, rotatably supported in the apparatus, for receiving a first and a second fastener;
• a first and a second receiving member a first and a second device realized as a first and a second torque power tool either pneumatically, electrically or hydraulically driven for effecting rotation of the respective receiving members to tighten or loosen the respective fasteners;
• a device for controlling an operation parameter of each device for effecting rotation to maintain a difference between the operation parameters within a predetermined value, the operation parameters including either:
• hydraulic and/or pneumatic fluid pressures;
• hydraulic and/or pneumatic fluid flow rates;
• electrical circuit parameters including current, voltage and/or magnetic field;
• torque output values;
• fastener rotation speeds;
• or
• any combination thereof;
• wherein during operation if the difference in the maintained operation parameter(s) exceeds the predetermined value the device for controlling regulates the maintained operation parameter(s) of the respective devices for effecting rotation by either:
• lowering the maintained operation parameter(s) of the device with the higher maintained operation parameter(s);
• raising the maintained operation parameter(s) of the device with the lower maintained operation parameter(s);
• or
• both raising and lowering the maintained operation parameter(s) of the respective devices;
• until the difference in the maintained operation parameter(s) returns to within the predetermined value;
• characterized in that the devices for effecting rotation are connected by a connector including:
• a first force-transmitting element rotatably attachable about a turning force axis of the first device for effecting rotation;
• a second force-transmitting element rotatably attachable about a turning force axis of the second device for effecting rotation;
• and
• wherein the second force-transmitting element is either rotatably attachable about, extensibly and retractably attachable along, or rotatably attachable about and extensibly and retractably attachable along at least a distal portion of the first force-transmitting element.