Patent ID: 6442898
Filing Date: 2002-09-03
Classification: E05D,E05Y

Abstract:
An improved controller for opening and closing a project window, comprising:a slide frame mountable to an inner side of a sash, and having two lip blades; a stop block disposed within the slide frame; a slide block slidably disposed within the slide frame; a retaining block fixedly disposed within the slide frame, and having two grooves, each groove being disposed on a respective side of the retaining block, each groove being defined by an upper wall that serves as a presser and a lower wall that serves as a slide blade, each groove receiving a respective one of the lip blades therein, so that the upper wall presses on a top of the respective lip blade, the retaining block further having a groove seat formed between the two grooves, the groove seat being disposed over the stop block and receiving the stop block therein; a washer disposed behind the stop block; a carrier arm mountable to the project window; a force arm having one end pivotally connected to the carrier arm, and another end pivotally connected to the slide block; a support arm having one end pivotally connected to an intermediate portion of the force arm, and another end pivotally connected to the retaining block; a connecting arm having one end pivotally connected to the carrier arm, and another end pivotally connected to the retaining block; a first fastener for pivotally connecting the another end of the support arm to the retaining block, which passes through the stop block and the washer; and a second fastener for pivotally connecting the another end of the connecting arm to the retaining block, which passes through the stop block and the washer, the first and second fasteners further fixing the retaining block to the slide frame, wherein the retaining block carries a weight of the project window.