Abstract: The plastic moulding and design structure has a load-bearing structure (3), which is wholly or partly surrounded by a polymer material (8) forming the moulding. The load-bearing structure (3) is formed from several interconnected, high strength, continuous fibre-reinforced structural elements (5). Thus, in a simple and inexpensive manner it is possible to produce structures with the most varied shapes such as containers, tanks, vehicle frames, etc.

Abstract: The piston is provided with a hollow space in which a head member for a piston rod is mounted. A disc is provided within the piston for seating of the head member via mating concave/convex surfaces and a separate support ring is disposed under a flange of the head member with mating concave/convex surfaces therebetween. An annular clamping member serves to secure the disc ring and head member together and also abuts against an internal shoulder within the piston. Eccentric loadings on the piston are compensated by tilting movements between the head member and piston in a self-adjusting manner.

Abstract: The internal combustion engine has a plurality of cylinders which are arranged in an annular series about a common central drive shaft. Each cylinder includes a pair of opposed pistons which are movable towards and away from each other while defining a combustion chamber therebetween. Each piston is connected to a piston rod which causes rotation of a cam guide device secured to the drive shaft. At least one cam guide device is provided with an annular flange which subdivides a pressure oil chamber at the end of the drive shaft into two sub-chambers. Pressure oil can be delivered to one or the other of the sub-chambers in order to move the cam guide device axially thereby changing the compression ratio in the combustion chamber between the two pistons.

Abstract: A single blank is used to make an expandable envelope construction having four side edges which can expand as the envelope construction is filled to capacity. The blank is provided with horizontal and vertical score lines and fold lines which permit the sides and bottom of the construction to collapse inwardly while the pocket enlarges in thickness and decreases in height and width. The blank has side flaps with rounded comers at the ends which are overlaid by the back panel and closure panel in an unsecured manner to maintain the envelope in a sealed condition when expanded.

Abstract: The internal combustion engine has a plurality of cylinders which are arranged in an annular series about a common central drive shaft. Each cylinder includes a pair of opposed pistons which are movable towards and away from each other while defining a combustion chamber therebetween. Each piston is connected to a piston rod which causes rotation of a cam guide device secured to the drive shaft. Each cam guide device has a curved cam surface having portions in phase-displaced relation to the curved cam surface of the other cam guide device as well as portions in mutually-phased relation. The cam surfaces each have a rectilinear portion to define a stationary combustion chamber for combustion between the pistons of each cylinder. The cam guide devices also have portions to permit opening of the exhaust ports prior to opening of the air scavaging ports of the cylinder.