A paddle for use with watercraft can include a shaft assembly, a handle connected to a first end of the shaft assembly, and a blade assembly including a flexible blade part removably connected at a second end of the shaft assembly, the blade part being foldable when removed from the shaft assembly. In some examples, the blade part is foldable into a rolled-up position when removed from the shaft assembly.

A paddle for use with watercraft can include a shaft assembly, a handle connected to a first end of the shaft assembly, and a blade assembly including a flexible blade part removably connected at a second end of the shaft assembly, the blade part being foldable when removed from the shaft assembly. In some examples, the blade part is foldable into a rolled-up position when removed from the shaft assembly.

A wind paddle sail assembly includes a sail having stiffened upper and lower ends and a paddle or pole having an upper fixed end and a lower portion with a lower free end. A fastener fastens the upper fixed end of the paddle or pole to the upper end of the sail. A downhaul strap fastens the lower end of the sail to the lower portion of the paddle or pole for adjusting tension in the sail. A method for operating a wind paddle sail assembly is also provided.

A wind paddle sail assembly includes a sail having stiffened upper and lower ends and a paddle or pole having an upper fixed end and a lower portion with a lower free end. A fastener fastens the upper fixed end of the paddle or pole to the upper end of the sail. A downhaul strap fastens the lower end of the sail to the lower portion of the paddle or pole for adjusting tension in the sail. A method for operating a wind paddle sail assembly is also provided.

The present invention relates to a nun-chuck-like kayaking mobility tool that enables easy maneuverability and repositioning of a kayak while obviating damage to a blade of a paddle or oar. The kayaking mobility tool includes a nun-chuck-like appearance, and includes a pair of shafts connected through a connecting cord. The shafts can be used for pushing off rocks, obstructions, the riverbed and other impediments in the kayaking path. The shafts and associated handles enable the kayaker to place the shafts on an underwater obstruction for turning the kayak in a desired direction while sitting in the kayak. The handles can include grips for comfortable holding of the shafts by the kayaker. The shafts can include caps at the respective bottom ends for secure gripping on the riverbed or obstruction. The mobility tool obviates the use of paddles/oars for pushing away from obstructions in order to reposition the kayak.

The present invention relates to a nun-chuck-like kayaking mobility tool that enables easy maneuverability and repositioning of a kayak while obviating damage to a blade of a paddle or oar. The kayaking mobility tool includes a nun-chuck-like appearance, and includes a pair of shafts connected through a connecting cord. The shafts can be used for pushing off rocks, obstructions, the riverbed and other impediments in the kayaking path. The shafts and associated handles enable the kayaker to place the shafts on an underwater obstruction for turning the kayak in a desired direction while sitting in the kayak. The handles can include grips for comfortable holding of the shafts by the kayaker. The shafts can include caps at the respective bottom ends for secure gripping on the riverbed or obstruction. The mobility tool obviates the use of paddles/oars for pushing away from obstructions in order to reposition the kayak.

A sport apparatus, including a handle, an action portion, a connection portion connecting the handle to the action portion, at least part of the connection portion including a structural battery, the structural battery including one or more energy storage devices, each of the one or more energy storage devices having at least one anode core of a continuous carbon fiber, an electrolyte arranged on the at least one continuous carbon fiber core, and a cathode layer coating arranged to the at least one continuous carbon fiber core on the electrolyte, and at least one sensor unit electrically connected to the energy storage devices, the at least one sensor unit providing signals related to use of the sport apparatus.

A sport apparatus, including a handle, an action portion, a connection portion connecting the handle to the action portion, at least part of the connection portion including a structural battery, the structural battery including one or more energy storage devices, each of the one or more energy storage devices having at least one anode core of a continuous carbon fiber, an electrolyte arranged on the at least one continuous carbon fiber core, and a cathode layer coating arranged to the at least one continuous carbon fiber core on the electrolyte, and at least one sensor unit electrically connected to the energy storage devices, the at least one sensor unit providing signals related to use of the sport apparatus.

Disclosed herein are systems and methods for a convertible standup paddle board (SUP) paddle. The convertible SUP paddle includes a first paddle end with a first, fixed blade, a second paddle end with a handle for gripping, and a shaft connecting the first paddle end to the second paddle end. Incorporated and housed within the handle end of the paddle shaft is a second, folding blade comprised of a plurality of overlapping/interlocking fan blades. The second folding blade is collapsed for SUP styles paddling and expanded for kayak-style paddling. Means for expanding, collapsing and locking the fan blades in either an expanded or collapsed format are also disclosed.

Disclosed herein are systems and methods for a convertible standup paddle board (SUP) paddle. The convertible SUP paddle includes a first paddle end with a first, fixed blade, a second paddle end with a handle for gripping, and a shaft connecting the first paddle end to the second paddle end. Incorporated and housed within the handle end of the paddle shaft is a second, folding blade comprised of a plurality of overlapping/interlocking fan blades. The second folding blade is collapsed for SUP styles paddling and expanded for kayak-style paddling. Means for expanding, collapsing and locking the fan blades in either an expanded or collapsed format are also disclosed.