Patent ID: 7363734

Claim:
Trench wall cutter comprising a cutting frame, at least one bearing shield arranged on the cutting frame, at least one axis arranged on the bearing shield, at least one cutting wheel having a cutting wheel hub, which is supported on the axis in a rotatable manner by means of at least one bearing, a driving device to drive the at least one cutting wheel in a rotating manner, which driving device has a drive motor located on the cutting frame, a recess in the bearing shield forming a drive train arranged at the top of the bearing shield, a drive shaft located in the drive train, which connects the drive motor located on the cutting frame with the cutting wheel for transmitting a torque from the drive motor to the at least one cutting wheel, at least one sealing member arranged between the bearing shield and the cutting wheel to seal the bearing against the area surrounding the trench wall cutter, and at least one lubricating device for feeding lubricant to the sealing member, wherein the lubricating device has a lubricant inlet port arranged above the cutting wheel when operated by a user, wherein the lubricating device has at least one lubricant feeding channel, at whose end the lubricant inlet port is arranged, the lubricant feeding channel extending at least in portions along the drive train and the drive shaft located therein, wherein the lubricant feeding channel includes an acute angle (.alpha.) with the drive train and the shaft located therein, and wherein the lubricant inlet port is arranged at the circumference of the bearing shield, the circumference enveloping the bearing shield around an axis of rotation of the at least one cutting wheel.