Abstract: This invention relates to a muffler having a purifying system for separating solid contents and eliminating poisonous gases such as carbon monoxide by means of an electrolysis apparatus which continuously provides oxygen separated from water to react with the carbon monoxide into carbon dioxide.

Abstract: An electric bicycle which includes an electric power driving mechanism in combination with a manual pedal driving system. The electric bicycle may be actuated by manual pedalling of the user, or through electrical power actuation or a combination of electrical power and manual operation. The power driving system includes a motor coupled to reduction gears for driving a set of bevel gears. The bevel gears are coupled to a shaft member having secured thereto a transmission gear to engage with a sprocket wheel to displace a standard chain member. The motor is supplied with DC electricity by a battery which may either be charged by solar cells or alternating current passing through a rectifier supplied by an external power system. Still further, the electric bicycle may have its speed controlled with a user's hand actuated speed controller mechanism.

Abstract: An improved laundry drier which includes an outer case as well as an inner case and a tub which is rotationally driven. There is provided a heating housing having heating elements contained therein. A blower is located beneath the heating elements in the heating housing. A first electromagnetic valve is located in a passage of a suction duct. A branch duct is formed into the passage and is in fluid communication with a suction end of the blower. A second electromagnetic valve is formed in the branch duct to control fluid communication between the passage of the suction duct and a spraying duct. There is provided a vacuum apparatus disposed therein. Hot air may be circulated through the spraying duct and finally through the blower and the heating elements in the heating housing during a drying process.