Automatic window/door system

Details Automatic window/door system Automatic window/door system

1991-03-13

1992-11-24

Wysocki, A. Jonathan

Electricity: motive power systems

Limitation of motor load, current, torque or force

318466, 49 26, H02P 300

Patent

active

051665867

ABSTRACT:
An automatic window opening/closing system includes a motor for driving a window. In association with the window, a pressure responsive sensor (preferably, a pressure responsive sensor with a coaxial structure having uniform sensitivity to pressures in all directions) is provided. A detector circuit is coupled to the pressure responsive sensor and evaluates a rate of change of a pressure on the sensor, thereby detecting a squeezed object caught in a way of the window during an operation of the system. A motor control circuit is provided to control the motor in response to a squeezed object detection signal from the detector circuit in such a direction to release the object from the window. The motor control circuit detects an overload condition of the motor in accordance with a motor terminal voltage and deenergizes the motor to prevent the motor from generating heat. Therefore, this system achieves improved performance, high reliability and safety.

REFERENCES:
patent: 3702960 (1972-11-01), Boyriven
patent: 4585981 (1986-04-01), Zintler
patent: 4621223 (1986-11-01), Murakami et al.
patent: 4943757 (1990-07-01), Richter et al.
patent: 5051672 (1991-11-01), Yaguchi

Affiliated with

Also associated with

Rating

Automatic window/door system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Automatic window/door system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic window/door system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-924392