Constant performance vacuum cleaner Patent #: 4021879
ApplicationNo. 06/228279 filed on 01/26/1981
US Classes:15/319, With automatic control15/377, Auxiliary or separate, i.e., non-fan, driving motor318/434, LIMITATION OF MOTOR LOAD, CURRENT, TORQUE OR FORCE (E.G., PREVENTING OVERLOAD)318/99, Fixed ratio of load or current division902/2Protects transmitted data (e.g., encryption or decryption)
ExaminersPrimary: Moore, Chris K.
Attorney, Agent or Firm
International ClassA47L 9/28 (20060101)
AbstractA vacuum cleaner structure having a control for reducing the total current delivery to the vacuum cleaner as when both a suction motor thereof and a brush motor thereof are being operated concurrently. The control includes an "On-Off" switch mounted on a portion of the suction hose for the vacuum cleaner. The invention comprehends the provision of such a current-reducing control where the full load currents of the suction and brush motors cumulatively total an amount greater than a preselected safe current deliverable to the vacuum cleaner. The control is arranged to be used with a vacuum cleaner having a suction hose connected between a suction unit and a cleaning unit thereof, such as a floor cleaning unit. In one form, the control utilizes a two-conductor wire suction hose, and in another form, the control utilizes a three-conductor wire suction hose. The "On-Off" switch is mounted on the handle on the end of the suction hose which may be attached to a cleaning unit and circuitry is provided in a control portion carried by the suction unit responsive to the disposition of the "On-Off" switch to effect the desired current and speed control of the system. The handle-mounted "On-Off" switch also controls the suction unit during cleaning operations which do not employ a floor cleaning unit including a motor-driven brush.
Field of SearchAuxiliary or separate, i.e., non-fan, driving motor