Watercraft locking assembly
A detachable fin is secured to a socket imbedded into the bottom layer of a watercraft such as a surfboard, wind surf board, standup paddle board, or kayak for example, by a mechanism including a screw whose head which is captured into a slot in the socket, and which passes through a hole in a spur projecting from the portion of the fin inserted into the slot. Two pivotally joined arms engaged over the screw astride a nut and forming a surrounding sleeve. The arms are locked in place by a padlock hasp, preventing the unauthorized extraction of the fin and a situs for locking to a cable or chain for securing the board.
1 . A securable screw-and-nut assembly which comprises:
a screw;
a nut engaged over said screw;
first and second arms, each having a proximal end and a distal end;
the proximal end of said first arm having an aperture engaged over said screw;
a sleeve engaged over said screw and around said nut;
said proximal ends being positioned astride said sleeve; and
said arms having aligned holes sized to be engaged by a locking device.
2 . The assembly of claim 1 , wherein said sleeve is integrally connected to said first arm.
3 . The assembly of claim 1 , wherein the proximal end of said second arm forms a cap of said sleeve.
4 . The assembly of claim 3 , wherein said cap comprises a diametrically widened collar overlapping said proximal end of said first arm.
5 . The assembly of claim 3 , wherein the proximal end of said second arm has a substantially central aperture engaged over said screw.
6 . The assembly of claim 1 , which further comprises a pin pivotally connecting said distal ends about an axis normal to said screw.
7 . The assembly of claim 1 , which further comprises:
said screw comprising:
a threaded shaft; and,
a head at one extremity of said post;
said head having and outer peripheral dimension larger than a diameter of said shaft.
8 . The assembly of claim 7 , wherein said head has a polygonal periphery.
9 . A locking mechanism which comprises:
the assembly of claim 7 ;
a first member having a slot;
a second member having a portion inserted into said slot and an aperture dimensioned to receive said screw; and wherein said slot has an enlarged internal dimensioned to slidingly hold said head.
10 . The mechanism of claim 9 , wherein said first member comprises a oblong socket; and said second member comprise a spur projecting rearwardly from said portion.
11 . The mechanism of claim 10 , wherein said socket comprises:
an elongated trough;
a shallow, peripheral flange;
said socket being dimensioned for insertion into the bottom surface of a watercraft.
12 . The mechanism of claim 11 , wherein said locking device comprises a padlock hasp.
13 . The mechanism of claim 11 , wherein said second member comprises a detachable fin; and said watercraft comprises a standup paddle board.
14 . An ornamental design for a nut securing assembly for watercraft as shown in the drawing.