Diving Flipper

Abstract

A diving flipper (10) for propulsion in water, comprisinga shoe part (100) for receiving a foot of a user, anda flipper part (200) having two ribs (210) and a blade (220) fastened to the ribs (210), wherein the ribs (210) are arranged on both sides of a median plane (M) of the diving flipper (10), and each have dorsal and plantar edges (250, 251) in the transverse direction of the ribs (210) and distal and proximal ends (260, 261) in the longitudinal direction of the ribs (210), andfastening devices (300) for fastening the ribs (210) to the shoe part (100),wherein the dorsal edge (250) of at least one rib (210) is inclined relative to the median plane (M) of the diving flipper (10), so that the dorsal edges (250) have less of a distance to each other than the plantar edges (251) of the ribs (210) to each other, wherein the ribs (210) elastically deform relative to each other at least in sections in the direction of the median plane (M) of the diving flipper (10) in the event of an external application of force to the flipper part (200) in the plantar direction.

1 . A diving flipper ( 10 ) for propulsion in water, the flipper comprising:
 a shoe part ( 100 ) for receiving a foot of a user;   a flipper part ( 200 ) having two ribs ( 210 ) and a blade ( 220 ) fastened to the ribs ( 210 ), wherein the ribs ( 210 ) are arranged on both sides of a median plane (M) of the diving flipper ( 10 ), and each have dorsal and plantar edges ( 250 ,  251 ) in the transverse direction of the ribs ( 210 ) and distal and proximal ends ( 260 ,  261 ) in the longitudinal direction of the ribs ( 210 ); and   fastening devices ( 300 ) for fastening the ribs ( 210 ) to the shoe part ( 100 ),   wherein the dorsal edge ( 250 ) of at least one rib ( 210 ) is inclined relative to the median plane (M) of the diving flipper ( 10 ), so that the dorsal edges ( 250 ) have less of a distance to each other than the plantar edges ( 251 ) of the ribs ( 210 ) to each other, wherein the ribs ( 210 ) elastically deform relative to each other at least in sections in the direction of the median plane (M) of the diving flipper ( 10 ) in the event of an external application of force to the flipper part ( 200 ) in the plantar direction.   
     
     
         2 . The diving flipper according to  claim 1 , wherein the dorsal edges ( 250 ) of both ribs ( 210 ) are inclined toward each other to the median plane (M) of the diving flipper ( 10 ), so that the dorsal edges ( 250 ) have less of a distance to each other than the plantar edges ( 251 ) of the ribs ( 210 ) to each other. 
     
     
         3 . The diving flipper according to  claim 1 , wherein the dorsal edges ( 250 ) are inclined to the median plane (M) in the transverse direction of the ribs ( 210 ) by an angle (β) of 10° to 60°. 
     
     
         4 . The diving flipper according to  claim 1 , wherein at least one rib ( 210 ) is comprised of at least one first and one second layer ( 211 ,  212 ), wherein the second layer ( 212 ) is shorter than the first layer ( 211 ). 
     
     
         5 . The diving flipper according to  claim 4 , wherein the first and/or second layer ( 211 ,  212 ) is tapered in the direction of the distal end ( 260 ) of a rib ( 210 ), wherein the second layer ( 212 ) is more strongly tapered than the first layer ( 211 ). 
     
     
         6 . The diving flipper according to  claim 4 , wherein the first and the second layer ( 211 ,  212 ) are connected with each other by an adhesive ( 213 ). 
     
     
         7 . The diving flipper according to  claim 1 , wherein the ribs ( 210 ) are manufactured out of glass fiber, carbon fiber or bamboo laminate. 
     
     
         8 . The diving flipper according to  claim 1 , wherein the distal ends ( 260 ) of the ribs ( 210 ) have a larger distance to each other than the proximal ends ( 261 ) of the ribs ( 210 ) to each other. 
     
     
         9 . The diving flipper according to  claim 1 , wherein at least one expansion element ( 400 ) is arranged on a distal end section ( 262 ) of at least one rib ( 210 ) and is configured to expand the extension of the rib ( 210 ) in a transverse direction. 
     
     
         10 . The diving flipper according to  claim 9 , wherein the expansion elements ( 400 ) have a distance to the corresponding rib ( 210 ), wherein the distance measures between 5 and 15 mm. 
     
     
         11 . The diving flipper according to  claim 3 , wherein the angle (β) is 20° to 50°. 
     
     
         12 . The diving flipper according to  claim 3 , wherein the angle (β) is 30° to 50°. 
     
     
         13 . The diving flipper according to  claim 3 , wherein the angle (β) is 45°. 
     
     
         14 . The diving flipper according to  claim 4 , wherein each of the ribs ( 210 ) is comprised of at least one first and one second layer ( 211 ,  212 ), wherein the second layer ( 212 ) is shorter than the first layer ( 211 ). 
     
     
         15 . The diving flipper according to  claim 9 , wherein at least one expansion element ( 400 ) is arranged on a distal end section ( 262 ) of each of the ribs ( 210 ). 
     
     
         16 . The diving flipper according to  claim 9 , wherein the transverse direction is a plantar direction. 
     
     
         17 . The diving flipper according to  claim 10 , wherein the distance is 10 mm.