Window operator
Number of patents in Portfolio can not be more than 2000
United States of America
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-
Jun 22, 1993
Grant Date -
N/A
app pub date -
Aug 2, 1991
filing date -
Dec 5, 1988
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A window operator has a prime mover for opening and closing of a window, with the prime mover being drivingly connected to a drive output member through an intermediate gear structure. A clutch device in the drive structure senses the torque applied to the drive output member in a window closing operation and a switch operable by the clutch is effective to deenergize the prime mover when the torque applied to the output member reaches a predetermined value. The switch can be adjustably located relative to the clutch whereby the predetermined value at which the motor will be deenergized may be varied in order to obtain a desired tension on a member connected to the closed sash of the window, such as a chain connected to the sash of a skylight window.
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