Hose pump and device for analysing a chemical or biological sample

Abstract

Hose pump with a hose for taking up the fluid to be pumped and with a planetary gear rack having a ring gear, a sun gear and at least two planetary gears interposed between the ring gear and the sun gear, wherein at least one of the teeth of the planetary gear during one cycle of the planetary gear around the sun gear at least once engages with the hose to squeeze a portion of the hose.

1 . Hose pump ( 1 ) with a hose ( 2 ) for taking up the fluid to be pumped and with a planetary gear rack ( 3 ) having a ring gear ( 4 ), a sun gear ( 5 ) and at least two planetary gears ( 6 ) interposed between the ring gear ( 4 ) and the sun gear ( 5 ), characterized in that
 at least one of the teeth ( 7 ) of the planetary gear ( 6 ) during one cycle of the planetary gear ( 6 ) around the sun gear ( 5 ) at least once engages with the hose ( 2 ) to squeeze a portion of the hose ( 2 ).   
     
     
         2 . Hose pump according to  claim 1 , characterized by a support surface, the portion of the hose ( 2 ) being squeezed between the tooth ( 7 ) of the planetary gear ( 6 ) and the support surface ( 10 ). 
     
     
         3 . Hose pump according to  claim 1  or  2 , characterized in that the ring gear ( 4 ) is a ring segment and that the ring gear ( 4 ) instead of a further ring segment that would complete the ring gear ( 4 ) to a ring has an opening ( 9 ), a portion of the hose ( 2 ) being arranged inside this opening ( 9 ). 
     
     
         4 . Hose pump according to  claim 3 , characterized in that the ring segment of the ring gear ( 4 ) spans over more than 180°. 
     
     
         5 . Hose pump according to  claim 3  or  4 , characterized in that the ring segment of the ring gear ( 4 ) spans over less than an angle is calculated by 360° minus an enclosure angle, the enclosure angle being calculated by the formula:
   enclosure angle=360°/number of planetary gears (6) of the planetary gear rack (3).
 
 
     
     
         6 . Hose pump according to any one of  claims 1  to  5 , characterized in that the planetary gear in the direction of its rotational axis extends over the ring gear and that the portion of the planetary gear that extends over the ring gear engages into the hose to squeeze a portion of the hose. 
     
     
         7 . Hose pump according to any one of  claims 1  to  6 , characterized in that a position sensor is arranged at the planetary gear or at the cage to determine the rotational position of the planetary gear in the planetary gear rack. 
     
     
         8 . A device for analysing a sample, said device comprising at least one depot chamber and at least one process chamber, whereas the process chamber is integrated in at least one first support member and the depot chamber is integrated in at least a second support member, whereas the support members are arranged in that the process chamber is connectable with the depot chamber by a relative movement of the first and second support members with respect to each other, the device further comprising a pump element for transferring the substances inside the device from one chamber to another,
 characterized in that the pump element is a hose pump ( 1 ) according to any one of  claims 1  to  7 .   
     
     
         9 . System comprising:
 a hose pump ( 1 ) according to any one of  claims 1  to  7  or a device according to  claim 8     a base station, said base station comprising at least a pump drive which acts on the hose pump ( 1 ) to drive the planetary gear around the sun gear.   
     
     
         10 . System according to  claim 9 , characterized in that the hose pump according to any one of  claims 1  to  7  or the device according to  claim 8  is detachably connected to the base station. 
     
     
         11 . Use of the hose pump ( 1 ) according to any one of  claims 1  to  7  or of the device according to  claim 8  or of the system according to one of the  claims 9  to  10  and in the field of point-of-care applications, in particular in the field of nucleic acid analysis.