Speed and mode control for a blender
Patent 5347205 Issued on September 13, 1994. Estimated Expiration Date: 
September 11, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
September 11, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3548280 3678288 3833845 3924169 Multi-purpose kitchen appliance Multiple mode variable speed motor control circuit Food processor Intermittent low speed control for motor operated appliance Electric food mixer Membrane potentiometer speed selection control for an electric food mixer Patent #: 4893942 InventorApplicationNo. 944048 filed on 09/11/1992US Classes:318/811, Pluse width modulation or chopping318/772, Plural speed366/206, With motor control366/601, MOTOR CONTROL388/904, Stored velocity profile388/907.5, Computer or microprocessor388/936Food preparation equipmentExaminersPrimary: Shoop, William M. Jr.Assistant: Martin, David Attorney, Agent or FirmInternational ClassH02P 005/28AbstractA blender is provided with a microprocessor for controlling energization of the blender drive motor, and a plurality of manually actuated switches for controlling the stepping of the microprocessor through a program which determines the mode and pattern of energization of the drive motor. There are N speed range selection switches, M speed selection switches and a pulse mode switch. Depending on the sequence in which these switches are actuated, the microprocessor controls the drive motor in a manual continuous mode at any one of N×M speeds, a manual pulse mode at any one of N×M speeds or an autopulse mode with any one of three patterns of energization. In the first pattern of energization the motor is energized to run at one of M constant speeds during intervals T1 which are separated by intervals T2 during which the motor is not energized. In a second pattern of energization the motor starts at one of M speeds, the energization being gradually decreased over each interval T1 so that the motor speed decreases. In a third pattern of energization, the motor is initially energized to run at one of M speeds with the energization increasing over each interval T1. Any mode may be programmed for one of M run intervals. All modes and patterns of motor energization are controlled by only M+N+1 switches (excluding ON/OFF switches) and the sequence in which the switches are actuated.Other References
Field of SearchBy pulse width or duty cycle modificationArmature control by digital or combined analog and digital circuitry By phase modification By frequency modification By phase and frequency modification By voltage or current modification Position or number of brushes SELF-COMMUTATED IMPULSE OR RELUCTANCE MOTORS SPACE-DISCHARGE-DEVICE COMMUTATED MOTOR BATTERY-FED MOTOR SYSTEMS Plural speed Condition responsive Frequency control With voltage magnitude control With voltage phase angle control With voltage pulse time control Pluse width modulation or chopping Voltage control MOTOR CONTROL With motor control | |
