Flexible tube pump

Claim 2

Pump with a housing comprising an internal surface forming at least a half circle and a rotor with two oppositely arranged rollers comprising a flexible tube against the surface and in which the compressed part of the tube during the rotation of the rotor is moving along the tube, wherein the half-circular surface is part of a cone, the rollers being truncated cones having their vertices in the area of the vertex of the internal surface, wherein the tapering angle of the cone of the internal surface is 30° - 120°; wherein at least one of the rollers is axially adjustable with respect to the rotor and the rotor comprises control adjusting means for axial movement of the rotor with respect to the housing.

Claim 3

Pump according to claim 1, wherein the tapering angle of the cone of the internal surface is 90°.

Claim 4

Pump with a housing comprising an internal surface forming at least a half circle and a rotor with two oppositely arranged rollers compressing a flexible tube against the surface and in which the compressed part of the tube during the rotation of the rotor is moving along the tube, wherein the half-circular surface is part of a cone, the rollers being truncated cones having their vertices in the area of the vertex of the internal surface, further wherein the rotor comprises control adjusting means for axial movement of the rotor with respect to the housing, wherein the adjusting means is characterized by a drive shaft for the rotor, said drive shaft having a central bore with an internal thread and adjustment screw provided with a slotted end mounted in the central bore of the drive shaft, the adjustment screw having a central bore with an internal thread, a pointed locking screw mounted in said central bore in the adjustment screw and pressing against the bottom of the bore of the adjusting screw.

Claim 5

Pump with a housing comprising an internal surface forming at least a half circle and a rotor with two oppositely arranged rollers compressing a flexible tube against the surface and in which the compressed part of the tube during the rotation of the rotor is moving along the tube, wherein the half-circular surface is part of a cone, the rollers being truncated cones having their vertices in the area of the vertex of the internal surface, further wherein the rotor comprises control adjusting means for axial movement of the rotor with respect to the housing, wherein the adjusting means is characterized by a drive shaft for the rotor, said drive shaft having a central bore with an internal thread and adjustment screw provided with a slotted end mounted in the central bore of the drive shaft, the adjustment screw having a central bore with an internal thread, a pointed locking screw mounted in said central bore in the adjustment screw and pressing against the bottom of the bore of the adjusting screw.

Claim 6

Pump with a housing comprising an internal surface forming at least a half circle and a rotor with two oppositely arranged rollers compressing a flexible tube against the surface and in which the compressed part of the tube during the rotation of the rotor is moving along the tube, wherein the half-circular surface is part of a cone, the rollers being truncated cones having their vertices in the area of the vertex of the internal surface, guide rollers for axial positioning of the tube, said guide rollers being mounted at the side of the tube opposite to the vertex of the internal surface, wherein the guide rollers are slidably mounted on guides substantially parallel to the internal surface in an axial plane through the guide rollers and wherein fixing clips for the tube are slidably mounted with respect to the internal surface.

Claim 7

Pump with a housing comprising an internal surface forming at least a half circle and a rotor with two oppositely arranged rollers compressing a flexible tube against the surface and in which the compressed part of the tube during the rotation of the rotor is moving along the tube, wherein the half-circular surface is part of a cone, the rollers being truncated cones having their vertices in the area of the vertex of the internal surface, guide rollers for axial positioning of the tube, said guide rollers being mounted at the side of the tube opposite to the vertex of the internal surface, wherein the guide rollers are slidably mounted on guides substantially parallel to the internal surface in an axial plane through the guide rollers and wherein fixing clips for the tube are slidably mounted with respect to the internal surface.

Claim 8

Pump according to claim 4, wherein the guide rollers are movable during the operation of the pump.

Claim 9

Pump according to claim 5, wherein the guide rollers are provided with guide pins cooperating with central control means mounted slidably movable in a regulating head supported centrally above the rotor.

Claim 10

Pump according to claim 6, wherein the regulating head is supported by means of an arm extending from a part of the housing opposite the internal, half-circular surface.

Claim 11

Pump according to claim 7, wherein the movement of the control means is synchronized with the movement of the fixing clips for the flexible tube.