Abstract: A posterior spinal osteosynthesis device for providing a transverse connection between two vertebral rods extending along a spinal segment wherein the device includes pairs of hooks adapted to laterally engage the vertebra with each pair being connected by a pair of parallel rods which are elastically bent to form a transverse arc whose ends are engaged in bores within the hooks.

Abstract: A baffle assembly for a catalytic converter through which a fluid flows axially has a stack of baffle plates each formed with a row of axially open-ended bumps having tops and, adjacent to the bump row, with a row of axially open-ended grooves having bottoms and substantially narrower than the bumps. Each bump is axially aligned with a respective groove of the respective plate. A plurality of flat spacer strips are sandwiched between the tops and bottoms of the bumps and grooves of adjacent baffle plates. The bumps and grooves form substantially parallel axially throughgoing passages for the fluid.