A tamper-resistant fastener such as a nut for a bicycle has a smoothly rounded generally dome-shaped body and one or more recesses formed into the body. Each recess has a first and open ended portion which is bounded on radially inward side but not on the radially outward side, and a second and closed ended portion which is bounded on both the radially inward side and the radially outward side. Additionally, each recess can have an additional notch formed therein, the recess and notch together forming a major and minor recess. A wall which bounds the radially inward side of the recess decreases in radial distance from the central axis of the nut as the recess proceeds in the circumferential direction. A mating wrench has teeth that match the recesses and, if present, the notches.


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    Title :

    Tamper-resistant bicycle axle nut


    Contributors:
    AHDOOT MICHAEL (author) / ATIGHEHCHI AMIR (author) / ZHENG OWEN (author) / TRAN HUY (author) / MARTINEZ JAZZMIN (author)

    Publication date :

    2016-10-11


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B62K Fahrräder , CYCLES / F16B DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES , Vorrichtungen zum Befestigen oder Sichern von Konstruktionselementen oder Maschinenteilen, z.B. Nägel, Bolzen, Schrauben, Sprengringe, Klemmen, Klammern oder Keile / B62H CYCLE STANDS , Fahrrad- oder Motorradständer / B25B TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING , Werkzeuge oder Werkbankvorrichtungen zum Befestigen, Verbinden, Lösen oder Halten, soweit nicht anderweitig vorgesehen



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