Abstract: A sports shaft having an elongated body having a perimeter defined by a plurality of main walls with adjacent ones of the main walls being interconnected through a corresponding one of a plurality of edge walls, the edge walls being spaced apart around the perimeter. A respective bumper extends along at least part of length of at least one of the edge walls. The main and edge walls without the respective bumper have a first stiffness along a longitudinal direction of the shaft, and a combination of the respective bumper with the at least one of the edge walls has a stiffness along the longitudinal direction greater than the first stiffness. A method of making a sports shaft is also discussed.

Abstract: A sports shaft having an elongated body having a perimeter defined by a plurality of main walls with adjacent ones of the main walls being interconnected through a corresponding one of a plurality of edge walls, the edge walls being spaced apart around the perimeter. A respective bumper extends along at least part of length of at least one of the edge walls. The main and edge walls without the respective bumper have a first stiffness along a longitudinal direction of the shaft, and a combination of the respective bumper with the at least one of the edge walls has a stiffness along the longitudinal direction greater than the first stiffness. A method of making a sports shaft is also discussed.

Abstract: A protective helmet with a second shell having a top end connected to a top portion of a first shell such as to allow relative movement between the first shell and the bottom end of the second shell about a connection between the top end and the top portion along two opposed directions. Two connecting members are each connected to a respective side portion of the first shell at a fixed location and are each connected to the bottom end of the second shell through a respective connection allowing relative movement therebetween. An adjustment mechanism is connected to the second shell and has a movable portion movable between an unlocked position free of the connecting members to allow relative movement between the first and second shells and a locked position in engagement with the connecting members to prevent relative movement between the first and second shells along at least one of the opposed directions.

Abstract: A protective helmet with a second shell having a top end connected to a top portion of a first shell such as to allow relative movement between the first shell and the bottom end of the second shell about a connection between the top end and the top portion along two opposed directions. Two connecting members are each connected to a respective side portion of the first shell at a fixed location and are each connected to the bottom end of the second shell through a respective connection allowing relative movement therebetween. An adjustment mechanism is connected to the second shell and has a movable portion movable between an unlocked position free of the connecting members to allow relative movement between the first and second shells and a locked position in engagement with the connecting members to prevent relative movement between the first and second shells along at least one of the opposed directions.

Abstract: The tire chain is adapted for snugly wrapping around an appropriately dimensioned tire and rotating therewith during use. The tire chain has a chain mesh having a plurality of links, and a plurality of wear inserts interspaced on the mesh and mounted to corresponding selected ones of the links. Each one of the wear inserts has a radially-inner component removably secured to a radially-outer component, independently from the integrity of the mesh, with a spacing therebetween within which the corresponding selected link is received and trapped. The radially-outer components having corresponding outward-facing wear portions submitted to wear during use. The wear inserts can be removed and replaced once worn by separating the radially-inner component from the radially-outer component.