Machine element or mechanism – Mechanical movements – Reciprocating or oscillating to or from alternating rotary
Patent
1993-07-08
1995-08-15
Luong, Vinh T.
Machine element or mechanism
Mechanical movements
Reciprocating or oscillating to or from alternating rotary
74505, 74506, 474148, 474154, F16H 2702, G05G 108
Patent
active
054409446
ABSTRACT:
A power window mechanism designed to be retrofitted onto the crankshaft of a conventional handcrank operated window opening and closing mechanism includes a motor, a rack with ball-type cogs driven by the motor, a gear driven by the rack, a transmission gear driven by the driven gear, and a separate conversion gear having a central hole shaped to fit onto the shaft and whereby transmit power from the motor to the shaft. The position of the motor is detected by a sensor which generates pulse generated in response to turning of the motor, without the need for an electrical input. The control circuit itself is provided with a processor capable of counting the pulses and controlling the operation of the motor, including its direction, in response to the pulses.
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