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A ball valve is a flow control device which uses a hollow, perforated, and pivoting ball to control fluid flowing through it. It is open when the hole through the middle of the ball is in line with the flow inlet, and closed when it is pivoted 90 degrees by the valve handle, blocking the flow. [1] The handle lies flat in alignment with the flow ...
Volleyball (ball) A volleyball is a ball used to play indoor volleyball, beach volleyball, or other less common variations of the sport. Volleyballs are spherical in shape and typically comprise eighteen nearly rectangular panels made from synthetic or genuine leather. These panels are organized into six identical sections, each consisting of ...
Adidas. The Adidas Tango is a family and brand of association football balls originally introduced as the "Tango Durlast" in 1978, specifically for the 1978 FIFA World Cup in Argentina. Variations of the design had been produced for various competitions including the FIFA World Cup, the UEFA European Championship, the South American Football ...
Telstar was the first 32-panel black-and-white ball used in the FIFA World Cup finals. Only 20 were supplied by Adidas. A brown ball (Germany-Peru) and a white ball (first half of Italy-Germany) were used in some matches. The first polyurethane coated ball, making it waterproof and resistant to wear and tear.
US 2837111, Mueller, Paul G., "Ball cock valve mechanism", published 6 January 1955, issued 3 June 1958 ; hysterisis issue. "Such flush tank valves as now commonly used are closed against the pressure of water from a source of supply which pressure opposes the movement of the float under rising water level in the tank.
Caged ball valve. The first artificial heart valve was the caged ball valve, a type of ball check valve, in which a ball is housed inside a cage. When the heart contracts and the blood pressure in the chamber of the heart exceeds the pressure on the outside of the chamber, the ball is pushed against the cage and allows blood to flow.
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