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Certain Home Vacuum Packaging Machines, Inv. 337-TA-496. Diane Publishing. pp. 10– 12. ISBN 1428956131. Hill, Judy (May 31, 1980). "Scrubber Needs More Than its Own Power." The Deseret News. "Whirlpool May Give Shock". The Telegraph-Herald. October 26, 1977 "Can Openers Found Perilous". The Milwaukee Journal. March 30, 1976
External vacuum sealers involve a bag being attached to the vacuum-sealing machine externally. The machine will remove the air and seal the bag, which is all done outside the machine. A heat sealer is often used to seal the pack. Typically these units use a dry piston vacuum pump which is often considered a "maintenance-free" pump.
Some early gas engines worked on the "vacuum" or "atmospheric" principle in a similar way to the Newcomen steam engine.A mixture of gas and air was eaten by the cylinder and ignited; the mixture expanded and part of it escaped through the exhaust valve; the valve then closed, the mixture cooled and contracted, and atmospheric pressure pushed the piston in.
Straight-six engine: Displacement: 2.9 L (2,927.8 cc), 3.0 L (2,989.8 cc) Cylinder bore: 82 mm (3.23 in) Piston stroke: 92.4 mm (3.64 in) Cylinder block material: Aluminium alloy: Cylinder head material: Aluminium alloy: Valvetrain: DOHC 4 valves x cyl. with VVT: Compression ratio: 15.5:1: Combustion; Supercharger: BorgWarner eBooster ...
Bore and stroke was 91 mm × 92.4 mm (3.58 in × 3.64 in). It was originally 80 PS (59 kW; 79 hp). Bosch MW inline injection pumps were used, which had flyweight governors and vacuum shutoff. Previous engines had used pneumatic governors, and "gorilla knob" to start and shut off the engine.
When it was introduced in 1987, the Series 60 was the first heavy-duty diesel engine with fully integrated electronic controls. [2] Detroit Diesel prescribed overhaul intervals of 500,000 miles (800,000 km), then raised that to 750,000 miles (1,210,000 km) after more experience was gained with the new engine.