Abstract: Operating an electric drive machine includes neutralizing a transmission in the electric drive machine operating in a first range, determining suitability of the electric drive machine for operating the transmission in a second range, and calculating a target transmission input speed, based on a speed parameter indicative of a transmission output speed, and the determined suitability for operating in a second range. A speed of an electric drive motor is varied based on the target transmission input speed, and a second clutch engaged to operate the transmission in the second range based on the varied speed of the electric drive motor. Related apparatus and control logic is also disclosed.

Abstract: A hand-operated vacuum pump is combined with a resilient closure sleeve for sealing and de-pressurizing the open space within a fermented beverage container. A pump cylinder is covered by a resilient closure sleeve which is insertable into the neck of the beverage container. A piston is coupled for extension and retraction through the pump cylinder. The piston carries a floating seal which is axially movable along a reduced diameter portion of the piston for opening and closing an air inlet port between an air transfer annulus and an evacuation chamber. The pump includes an improved check valve assembly in which a suction port is sealed by a resilient membrane which engages a tapered sealing surface in which the suction port is formed.

Abstract: A hand-operated pump is combined with a closure cap for sealing and pressurizing the open space within a carbonated beverage container. A pump cylinder is integrally formed with a closure screw cap and is insertable through the neck of the beverage container. A piston is coupled by a retainer ring for extension and retraction through the pump cylinder. The piston carries a floating seal which is axially movable along a reduced diameter portion of the piston for opening and closing an air inlet port between an air supply annulus and a compression chamber. The pump includes an improved check valve assembly in which a compressed air discharge port is sealed by a resilient membrane which engages a tapered sealing surface which is coincident with the compressed air discharge port.