Abstract: A helmet comprising: an inner shell; an outer shell; a sliding interface between the inner shell and the outer shell; and a switch configured to be selectively switchable between first and second discrete modes, the first mode allowing relative sliding between the inner shell and the outer shell at the sliding interface in response to an impact to the helmet, the second mode preventing relative sliding between the inner shell and the outer shell at the sliding interface.

Abstract: A helmet having an energy absorbing layer, an outer layer that is harder than the energy absorbing layer and a plurality of outer plates mounted on the outer surface of the outer layer is provided. The outer plates on the outer layer can slide across the outer layer. A low friction interface between the outer surface of the outer layer and at least a part of the outer surface of the outer plates contacts the outer surface of the outer layer under an impact.

Abstract: A helmet comprising: an inner shell; an outer shell; a sliding interface between the inner shell and the outer shell; and a switch configured to be selectively switchable between first and second discrete modes, the first mode allowing relative sliding between the inner shell and the outer shell at the sliding interface in response to an impact to the helmet, the second mode preventing relative sliding between the inner shell and the outer shell at the sliding interface.

Abstract: A helmet (1) comprising an energy absorbing layer (3), a relatively hard layer (2) that is harder than the energy absorbing layer (3) and is formed outward of the energy absorbing layer (3) and a plurality of outer plates (20) mounted on the outer surface of the relatively hard layer (2); wherein the outer plates (20) are mounted on the relatively hard layer (2) such that, under an impact to an outer plate (20), the outer plate (20) can slide across the relatively hard layer (2) and move relative to other outer plates (20); and a low friction interface is provided between the outer surface of the relatively hard layer (2) and at least a part of the surface of the outer plates (20) that is in contact with the outer surface of the relatively hard layer (2) under an impact to an outer plate (20). FIG.

Abstract: The invention relates to a connection arrangement (6) adapted to connect a first (2) and a second part (3) slidably arranged in relation to each other. The connection arrangement (6) is characterized in that said connection arrangement (6) is adapted to allow the sliding movement between the first (2) and the second part (3) in all directions. The arrangement (6) comprises a connection member (7) directly or indirectly connected to at least one of the first part and the second part (2, 3) and a device creating a spring force and/or a damping force (8) during sliding movement between the first and second part (2, 3) adapted to be connected with or to cooperate with said connection member (7).

Abstract: The invention relates to a connection arrangement (6) adapted to connect a first (2) and a second part (3) slidably arranged in relation to each other. The connection arrangement (6) is characterized in that said connection arrangement (6) is adapted to allow the sliding movement between the first (2) and the second part (3) in all directions. The arrangement (6) comprises a connection member (7) directly or indirectly connected to at least one of the first part and the second part (2, 3) and a device creating a spring force and/or a damping force (8) during sliding movement between the first and second part (2, 3) adapted to be connected with or to cooperate with said connection member (7).