Manual Oar Propulsion Systems for Standup Paddle Boards

Abstract

An oar propulsion system having an oarlock attached to the rear of a standup paddle board (SUP) is used for manual propulsion of the board. The oarlock is structurally attached to the paddle board in a first embodiment, or remains removable in a second embodiment as a conversion kit. The oar shaft has a blade on one end and an exchangeable handle on the other end; the exchangeable handle may be replaced by a waist strap that is tied the paddler’s body for better stability and for steering while paddling.

1 . An oar propulsion system for standup paddle boards (SUP), comprising:
 an oarlock mounted onto the rear of a paddle board;   an oar paddle having a blade on one end of the shaft and an interconnecting rotary joint on the other end of the shaft; and   a detachable hand handle connected to the interconnecting rotary joint on the oar shaft.   
     
     
         2 . The oar propulsion system for SUP according to  claim 1 , wherein the oar paddle has a straight shaft for dual use as an oar on the oarlock or as a SUP paddle without the oarlock. 
     
     
         3 . The oar propulsion system for SUP according to  claim 1 , wherein the oar paddle has a shaft curved or angled downwards near the blade. 
     
     
         4 . The oar propulsion system for SUP according to  claim 1 , wherein the detachable hand handle has a concentric, free-rotating shell or wrap on the outside. 
     
     
         5 . The oar propulsion system for SUP according to  claim 1 , wherein a detachable waist strap is connected to the rotary joint on the oar shaft. 
     
     
         6 . The oar propulsion system for SUP according to  claim 5 , wherein the detachable waist strap is soft, semi-rigid, or rigid for supporting the back of the standup paddler. 
     
     
         7 . The oar propulsion system for SUP according to  claim 6 , wherein the detachable waist strap has a flexible belt for tying to paddler’s body and quick-release from paddler’s body. 
     
     
         8 . An oar propulsion system for standup paddle board (SUP), comprising:
 a removable oarlock mounted to the rear of the SUP board;   an oar paddle having a blade on one end of the shaft and an interconnecting rotary joint on the other end of the shaft; and   a detachable hand handle connected to the interconnecting rotary joint on the oar shaft.   
     
     
         9 . The oar propulsion system for SUP according to  claim 8 , wherein the oar paddle has a straight shaft for dual use as an oar on the oarlock or as a SUP paddle without the oarlock. 
     
     
         10 . The oar propulsion system for SUP according to  claim 8 , wherein the oar paddle has a shaft curved or angled downwards near the blade. 
     
     
         11 . The oar propulsion system for SUP according to  claim 8 , wherein the detachable hand handle has a concentric, free-rotating shell or wrap on the outside. 
     
     
         12 . The oar propulsion system for SUP according to  claim 8 , wherein a detachable waist strap is connected to the oar shaft through the rotary joint. 
     
     
         13 . The oar propulsion system for SUP according to  claim 12 , wherein the detachable waist strap is soft, semi-rigid, or rigid for supporting the back of the standup paddler. 
     
     
         14 . The oar propulsion system for SUP according to  claim 13 , wherein the detachable waist strap has a flexible belt for tying to paddler’s body and quick-release from paddler’s body. 
     
     
         15 . The oar propulsion system for SUP according to  claim 8 , wherein the removable oarlock is integrated to at least one clamp for mounting onto the rear of a paddle board. 
     
     
         16 . The oar propulsion system for SUP according to  claim 8 , wherein the removable oarlock is integrated to a frame structure adjustable in size for mounting onto the rear of different sized paddle boards.