Drive device for a surfboard

Abstract

The invention relates to a drive device for a surfboard, comprising movable elements for increasing the propulsion resulting from said drive device. Said elements are set in motion by the user of the surfboard. The user can thus travel through the water with their surfboard while simultaneously training their body.

1 . A propulsion device for a surfboard with at least two movable fins ( 10 ,  10 ′) which can be deflected laterally and are arranged at the underfoot of the surfboard
 characterized in that 
 the fins ( 10 ,  10 ′) are connected by at least one connecting rod ( 5 ,  5 ′). 
 
     
     
         2 . The device ( 1 ) according to  claim 1 ,
 characterized in that   at least one flexible fin is arranged at the underfoot of the surfboard.   
     
     
         3 . The device ( 1 ) according to  claim 1 ,
 characterized in that   at least one movable fin ( 10 ) is arranged behind the pivot point ( 2 ) of the drive rod ( 1 ) and at least one movable fin ( 10 ″) is arranged in front of the pivot point ( 2 ) of the drive rod ( 1 ).   
     
     
         4 . The device ( 1 ) according to  claim 1 ,
 characterized in that   the drive rod ( 1 ) is stabilized laterally by means of a ball or slide bearing ( 2 ).   
     
     
         5 . The device ( 1 ) according to  claim 4 ,
 characterized in that   a tilting of the lever arm ( 6 ) of 180° takes place by deflecting the drive rod ( 1 ) up to the mounting plate ( 3 ) towards the front or rear.   
     
     
         6 . The device ( 1 ) according to  claim 4 ,
 characterized in that   the drive rod ( 1 ) is foldable or can be adjusted in height or removed.   
     
     
         7 . The device ( 1 ) according to  claim 1 ,
 characterized in that   at least one movable fin ( 10 ), which is laterally deflectable, is attached on the underside of the surfboard and has a plateau ( 14 ).