A hinge assembly , comprising: a first hinge arm having a first longitudinal axis (C1), the first hinge arm defining a first end portion having a first opening arranged along the first longitudinal axis (C1) and defining a first axis (A), the first hinge arm being pivotable about the first axis (A); a second hinge arm having a second longitudinal axis (C2), the second hinge arm defining a second end portion having a second opening defining a second axis (B), the second hinge arm being pivotable about the second axis (B), wherein when the first hinge arm and the second hinge arm are in an extension configuration the first and second longitudinal axes (C1, C2) are coaxial; wherein when the first and second longitudinal axes (C1, C2) are coaxial, the second opening is arranged along a third longitudinal axis (D) parallel to the first and second longitudinal axes (C1, C2) and offset by a lateral distance perpendicular to the coaxial first and second longitudinal axes (C1, C2) and measured between the first and second coaxial axes (C1, C2) and the third longitudinal axis (D); wherein the first end portion and the second end portion define first and second geared profiles , respectively, arranged to cooperate with one another and form an interface ; wherein the first end portion has a first radius (R1) smaller than a second radius (R2) of the second end portion , wherein the first radius (R1) is generally uniform along the first geared profile and the second radius (R2) is generally uniform along the second geared profile ; and wherein a hinge plate is configured to retain the first and second end portions connected, aside from the geared profiles . a first hinge arm having a first longitudinal axis (C1), the first hinge arm defining a first end portion having a first opening arranged along the first longitudinal axis (C1) and defining a first axis (A), the first hinge arm being pivotable about the first axis (A); a second hinge arm having a second longitudinal axis (C2), the second hinge arm defining a second end portion having a second opening defining a second axis (B), the second hinge arm being pivotable about the second axis (B), wherein when the first hinge arm and the second hinge arm are in an extension configuration the first and second longitudinal axes (C1, C2) are coaxial; wherein when the first and second longitudinal axes (C1, C2) are coaxial, the second opening is arranged along a third longitudinal axis (D) parallel to the first and second longitudinal axes (C1, C2) and offset by a lateral distance perpendicular to the coaxial first and second longitudinal axes (C1, C2) and measured between the first and second coaxial axes (C1, C2) and the third longitudinal axis (D); wherein the first end portion and the second end portion define first and second geared profiles , respectively, arranged to cooperate with one another and form an interface ; wherein the first end portion has a first radius (R1) smaller than a second radius (R2) of the second end portion , wherein the first radius (R1) is generally uniform along the first geared profile and the second radius (R2) is generally uniform along the second geared profile ; and wherein a hinge plate is configured to retain the first and second end portions connected, aside from the geared profiles . <EOS>