Collapsible boat anchor

Claim 1

A BOAT ANCHOR COMPRISING AN ELONGATED SHANK, MEANS ADJACENT TO THE UPPER END OF THE SHANK FOR ATTACHMENT TO AN ANCHOR LINE, MEANS ADJACENT TO THE LOWER END OF SAID SHANK DEFINING A PAIR OF OPPOSITELY FACING OPPOSED AXIALLY SPACED SHOULDERS, A SPIDER ROTATABLY MOUNTED ON SAID SHANK AND CONFINED BETWEEN SAID SHOULDERS AGAINST APPRECIABLE AXIAL SHIFTING MOVEMENT IN EITHER DIRECTION, SAID SPIDER INCLUDING A CENTRAL HUB PORTION FROM WHICH THERE PROJECT RADIALLY OUTWARDS A PLURALITY OF RADIAL SPACED APART SPIDER ARMS, AN ANCHOR FLUKE PIVOTED AT ITS PROXIMATE END TO EACH SPIDER ARM AND MOVABLE BETWEEN AN EXTENDED POSITION WHEREIN IT IS SUBSTANTIALLY NORMAL TO THE AXIS OF THE SHANK AND A FOLDED POSITION WHEREIN IT LIES IN CLOSE PROXIMITY TO THE SHANK AND IN SUBSTANTIAL PARALLELISM THEREWITH, A LATCH PROJECTION FORMED ON EACH FLUKE AND PRESENTING FIRST AND SECOND LATCH SHOULDERS, A LATCH COLLAR SLIDABLE AXIALLY ON THE SHANK ABOVE SAID OPPOSITELY FACING SHOULDERS, SPRING MEANS YIELDINGLY BIASING SAID LATCH COLLAR DOWNWARDLY ON THE SHANK, SAID COLLAR OVERLYING AND ENGAGING THE FIRST LATCH SHOULDERS ON THE FLUKES WHEN THE LATTER ARE IN THEIR FOLDED POSITION AND SERVING YIELDINGLY TO MAINTAIN THE FLUKES IN SAID FOLDED POSITION, SAID COLLAR BEING IN RADIAL ALIGNMENT WITH THE SECOND LATCH SHOULDERS ON THE FLUKES WHEN THE LATTER ARE IN THEIR EXTENDED POSITION AND SERVING TO INTERPOSE BETWEEN SUCH SHOULDERS AND THE ANCHOR SHANK A SOLID COLUMN OF METAL IN ORDER POSITIVELY TO PREVENT MOVEMENT OF THE FLUKES AWAY FROM THEIR EXTENDED POSITION, AND A MANUAL ACTUATOR FOR FACILITATING MOVEMENT OF THE LATCH COLLAR AGAINST THE ACTION OF SAID SPRING BIASING MEANS.