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    • 4. 发明专利
    • Collapsible boating anchor
    • GB2325448A
    • 1998-11-25
    • GB9705407
    • 1997-03-15
    • NORCLIFFE JOHN BARRY
    • NORCLIFFE JOHN BARRY
    • B63B21/24B63B21/36
    • An easily resettable collapsible anchor comprises a spindle 10 connectible by a hole 12 at one end to a cable and having three flukes 14 pivotally connected to its other end. A cam surface 38 on each fluke contacts one end of a sleeve 26 which is located on the spindle by a multiplicity of spring-loaded balls 28 housed in the sleeve and engaging in a helical groove 24 in the spindle. The cam surfaces can displace the sleeve axially along the spindle against the action of the balls to allow each fluke to pivot from the operative position shown into a collapsed inoperative position when a pull greater than the normal working load is exerted on the cable. This usually requires use of the boat's engine. The anchor can be reset so as to bring the flukes back into operative position by simply screwing the sleeve along the spindle until it is clamped against the cam surfaces. A loose collar 42 which snaps radially onto the spindle and has an end-flange 44 is reversible end-for-end to lock the anchor against collapse if desired.