Combination assembly for managing a hose or like elastic pump tube in a positive displacement pump

A combination assembly for managing a pump hose or elastic pump tube or pump channel used in a peristaltic pump, wherein the pump comprises a rotor (3) that compresses the hose/tube and an assembly that adjusts the pump pressure and/or compression imposed on the hose/tube, the assembly comprising a steplessly adjustable eccentric adjustment mechanism which cooperates with the rotor to directly control the compressive force imposed on the hose/tube, the eccentric adjustment mechanism comprising an eccentric adjustment bushing (5) mounted on a crankshaft pin (10), a worm gear (6) having an end (18) dimensioned and configured to be rotated by means of a calibrated torque wrench, wherein said worm gear is mounted inside the eccentric adjustment bushing, a spur gear (9), a lockcover (4), lockpins (11) and at least one locking bolt (12), wherein a fixed torque is applied to the worm gear (6) using the calibrated torque wrench that rotates the worm gear (6) and the eccentric adjustment bushing (5) mounted on the crankshaft pin (10) whereby the gap (23) between the rotor outer surface and a pump cavity inner periphery is changed and a constant compressive force is imposed on the hose/tube.