Abstract: The invention disclosures a new type of connection of a crankshaft with pistons in piston engines. Pistons and crankshaft are connected using so called sinusoidal or harmonic mechanism. Such mechanism allows to reduce quantity, dimensions and mass of piston group details, to simplify their shape and manufacturing technology. The mechanism improves density of connection between cylinder and the piston, ensures smoother motion of the piston, improves conditions of combustion of fuel. New variants of an arrangement of cylinders and pistons allow to reduce dimension and mass of the cylinder block and whole engine. Reduction of kinematic links number lets to reduce vibration, mechanical noise, deterioration of pistons and walls of cylinders. The invention can be used in design and production of many types of piston engines.

Abstract: A person can safely descend from a burning high-rise building or the like using an inflatable flying body that has a hollow conical form in an inflated deployed condition, but is deflated and folded into a backpack form in a stowed condition. The flying body includes an upper stabilizing ring, a lower nose structure with a pneumatic damping body, spoke struts extending conically therebetween, a cover skin covering the abovementioned inflatable components to form the conical outer surface and provide aerodynamic braking drag, and gas generators to inflate the inflatable components. A person straps on the apparatus in the stowed backpack form and pulls a handle to actuate the gas generators for inflating the apparatus, whereby the expanding apparatus ejects the person from the building and then orients itself in a nose-down attitude during the descent. The pneumatic damping body damps and dissipates the landing impact energy.