Hose pump

Abstract

A hose pump is provided having an elastically deformable hose ( 3 ) for a medium ( 7 ) to be conveyed, and a hose bed ( 2 ), over which the hose ( 3 ) is guided. Furthermore, at least one squeeze element ( 6 ) is provided that is movable along the hose bed ( 2 ), for deforming the hose ( 3 ) on the hose bed ( 2 ) in order to this way move forward the medium ( 7 ) inside the hose ( 3 ). The hose bed ( 2 ) is provided at least partially with a friction-reducing coating ( 8 ).

1 . A hose pump comprising: an elastically deformable hose ( 3 ) for a medium ( 7 ) to be conveyed, a hose bed ( 2 ) over which the hose ( 3 ) is guided, at least one squeeze element ( 6 ) that is movable along the hose bed ( 2 ) that deforms the hose ( 3 ) on the hose bed ( 2 ) in order to move the medium ( 7 ) forward inside the hose ( 3 ), and a friction-reducing coating ( 8 ) located on at least a portion of the hose bed ( 2 ). 
     
     
         2 . The hose pump according to  claim 1 , wherein the friction-reducing coating ( 8 ) is formed from at least one of plastic, graphite, diamond-graphite, perylene, or hard fat. 
     
     
         3 . The hose pump according to  claim 2 , wherein the friction-reducing coating ( 8 ) is formed from PTFE. 
     
     
         4 . The hose pump according to  claim 1 , wherein the friction-reducing coating ( 8 ) is adhered to the hose bed ( 2 ). 
     
     
         5 . The hose pump according to  claim 1 , wherein the hose bed ( 2 ) has a profile, which is shaped concavely in reference to a central line ( 9 ) extending in a longitudinal direction of the hose ( 3 ), with a central section ( 10 ) including the central line ( 9 ) having a first radius of curvature and two neighboring sections ( 11 ) abutting the central section having second radii of curvature, which are greater than the first radius of curvature. 
     
     
         6 . The hose pump according to  claim 5 , wherein the profile of the hose bed ( 2 ) includes two edge sections ( 12 ), which have third radii of curvature that are smaller than the second radii of curvature of the neighboring sections ( 11 ). 
     
     
         7 . The hose pump according to  claim 6 , wherein the edge sections ( 12 ) of the profile taper towards an outside with a convex curvature. 
     
     
         8 . The hose pump according to  claim 1 , wherein the squeeze element ( 6 ) comprises a roll, which rolls over the hose ( 3 ) and deforms the hose against the hose bed ( 2 ). 
     
     
         9 . The hose pump according to  claim 1 , wherein the squeeze element ( 6 ) is guided in reference to the hose bed ( 2 ) such that initially during a motion along the hose bed ( 2 ) the squeeze element only slightly deforms the hose ( 3 ) and with increasing path of motion it steadily and increasingly deforms the hose until the hose is completely clamped off. 
     
     
         10 . The hose pump according to  claim 1 , wherein the hose ( 3 ) is made from PVC, PTFE, or silicon.