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|국가/구분||United States(US) Patent 등록|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 8 인용 특허 : 166|
A central vacuum cleaning system has multiple vacuum sources. The multiple vacuum sources are connected through pipes to wall valves. In use a hose is plugged into one of the valves. A handle is connected to the hose. A wand extends from the handle. Attachments such as a power brush are connected to the wand. Switches apply power from one or more power sources to the vacuum sources. The application of power by the switches is controlled by a control circuit.
1. A central vacuum cleaning system comprising: a) a plurality of vacuum sources connected to provide parallel suction forces, each vacuum source comprising a vacuum motor,b) a control circuit, andc) a plurality of switches, each switch associated with a respective one of the vacuum sources, wherein the control circuit is adapted to control the switches, and each switch is adapted to apply electrical power to its associated vacuum source in accordance with control from the control circuit, and wherein the control circuit is connected independently to eac...