Abstract: A multistage compressor has a yoke with a cross slider and roller bearings pressed against the sides of the cross slider by spring forces to enable the cross slider to slide smoothly within the yoke. The spring forces are generated by springs disposed between the yoke and a liner plate that urges the roller bearings against the cross slider. By this construction, the yoke and cross slider are not damaged during operation of the compressor even if the dimensions of the members change due to thermal expansion.

Abstract: A vacuum drying apparatus for refuse or the like includes a drying vessel which receives a material, e.g., refuse, to be dried; a heat recoverer connected to the drying vessel through a steam discharge passage extending from the upper portion of the drying vessel; means for exhaust and drainage mounted to the heat recoverer; a heat pump; a radiator provided in the heat pump; heat exchanger for the drying vessel which introduces the heat of a refrigerant flowing through a piping of the heat pump into the drying vessel; and heat exchanger for the heat recoverer which introduces the heat of the refrigerant flowing through the piping of the heat pump into the heat recoverer. The refrigerant piping of the heat pump is capable of being switched over from a flow of the refrigerant through a circulation system for heating the drying vessel and cooling the heat recoverer, and discarding the heat generated by the radiator.

Abstract: A method and apparatus for reinforcing and repairing piping are disclosed for forming a film on the inside of a pipe line. The apparatus includes a film forming device having spaced radially extending front and rear walls which is inserted within the pipe line. When so inserted, the apparatus and the inside surface of the pipe line define an annular space into which film forming material is introduced. This annular space can be used to straddle a cracked portion of the pipe line, a joint or other inadequately sealed areas in which leakage may occur. A film adjusting device comprising a rotary driving element and a rotary film adjusting element are provided and are flexibly connected to the film forming device. The rotary drive device includes a motor and spaced front and rear discs each of which is attached to a plurality of outwardly extending fragments.