Patent ID: 6381798
Filing Date: 2002-05-07
Classification: B08B

Abstract:
In drain cleaning apparatus comprising a frame, a cable drum supported on said frame for rotation about a drum axis, said drum having axially spaced front and rear ends and an opening through said front end, a drain cleaning cable coiled in said drum about said axis and having an end for extending through said opening and into a drain to be cleaned, a drive motor supported on said frame, a drive pulley driven by said motor, a drive belt between said drive pulley and drum for rotating said drum and cable, and means including at least one spring biasing said motor to tension said belt, the improvement comprising: said at least one spring having a predetermined force providing for slippage between said belt and drive pulley in response to the imposition of a predetermined torque on said cable during rotation of said drum and cable about said drum axis, and the force of said at least one spring being adjustable.