Interlock USA, Inc.

Daniel Perry

Peter J Minter

A child safety device for a casement window includes a handle-driven gear reduction assembly having a sensor gear driven at a reduced speed relative to the handle, a sensor arm driven by the sensor gear of the gear reduction assembly and a slider movable between a stop position where rotation of the handle is prevented and a retracted position where rotation is allowed. A spring biases the slider towards the stop position. The slider is held in the retracted position by a catch and is released by the sensor arm to prevent further opening of the window when the sensor gear reaches a predetermined location. The safety device resets when the window is closed and can be overridden to allow full opening of the window by an adult. In the preferred design, the child safety device is a cover that can replace the cover of an existing casement window operator.

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Reno, NV, United States of America

Daniel Perry