Abstract: A domino-type torque generator includes a base member, and a plurality of toppling members pivotally connected to the base member. Each toppling member is pivotable from an upright position to an inclined position, or from the inclined position directly to an opposite inclined position, about a torque shaft extending transversely through a lower end portion of each toppling member. One end of each torque shaft is provided with a pinion. A first differential gear is connected to the pinions to accumulate torques applied on the torque shafts by toppling of the toppling members. A rotating cage of the first differential gear is the output, and is directly or indirectly connected to one of the side gears of the next differential gear, which is used to accumulate output torque from the first differential gear. A drive mechanism is configured to repeatedly drive the toppling members to topple, thereby continuously generating torques.

Abstract: A double action hinge unit is disclosed which comprises a first base element, a second base element and at least two connection elements. Each base element has at least two upward extensions. Each connection element is hingedly connected with an extension of the first base element and an extension of the second base element. The double action hinge unit is changeable among at least three combination states. When the double action hinge unit is in a second combination state, the at least two connection elements are arranged side by side, such that the double action hinge unit is rotatable about a rotational axis at one side into a first combination state and is also rotatable about a rotational axis at the other side into a third combination state.

Abstract: A double action hinge unit is disclosed which comprises a first base element, a second base element and at least two connection elements. Each base element has at least two upward extensions. Each connection element is hingedly connected with an extension of the first base element and an extension of the second base element. The double action hinge unit is changeable among at least three combination states. When the double action hinge unit is in a second combination state, the at least two connection elements are arranged side by side, such that the double action hinge unit is rotatable about a rotational axis at one side into a first combination state and is also rotatable about a rotational axis at the other side into a third combination state.

Abstract: A double action hinge unit is disclosed which comprises a first base element, a second base element and at least two connection elements. Each base element has at least two upward extensions. Each connection element is hingedly connected with an extension of the first base element and an extension of the second base element. The double action hinge unit is changeable among at least three combination states. When the double action hinge unit is in a second combination state, the at least two connection elements are arranged side by side, such that the double action hinge unit is rotatable about a rotational axis at one side into a first combination state and is also rotatable about a rotational axis at the other side into a third combination state.