Vkr Holding A/s

V. Kann Rasmussen Industri A/s

Ole Fejer

Jens Jørren Sørensen

Carl Johannes Hammer

A push-pull chain actuator () includes a housing with a chain exit/entry opening () and a sprocket () arranged to engage a push-pull chain (). The sprocket () causes the polygon effect. The actuator includes a first chain guide part () for guiding said push-pull chain () around the sprocket () and a second chain guide part (lob) for guiding said push-pull chain () at the correct angle between the chain exit/entry opening () and the sprocket (). The second chain guide part () is shaped and dimensioned to counteract the polygon effect. Alternatively, the second chain guide part () can be shaped and dimensioned to reduce chain oscillations caused by the rollers () engaging or disengaging the chain exit/entry opening () at the end of the second chain guide part ().

Push-pull chain actuator with reduced chain vibrations

A push-pull chain actuator () comprises a housing with a chain exit/entry opening () and a sprocket () arranged to engage a push-pull chain (). The sprocket () causes the polygon effect. The actuator comprises a first chain guide part () for guiding said push-pull chain () around the sprocket () and a second chain guide part () for guiding said push-pull chain () at the correct angle between the chain exit/entry opening () and the sprocket (). The second chain guide part () is shaped as a meandering path to counteract the polygon effect. Alternatively, the second chain guide part () can be shaped and dimensioned to reduce chain oscillations caused by the rollers () engaging or disengaging the chain exit/entry opening () at the end of the second chain guide part ().

A manually releasable coupling device for connecting an elongate operator chain (2) with a frame or main frame member of a window comprises a first coupling member (3) for connection with a free end of the operator chain (2) and a second coupling member (6-10) designed for mounting in or on the frame or main frame member. The first coupling member is a flat disc-shaped element (3) with a substantially keyhole-shaped recess 85), while the second coupling member comprises a shaft section (6) for mounting in a bore in the frame member or the main frame member in connection with a turning handle (7). The shaft section (6) has a local constriction (8) for releasable engagement with the keyhole-shaped recess (5) in the disc-shaped element (3). In order to allow manual closing of the window under surmounting of sealing pressure, the shaft section may be eccentric relative to the rotational axis of the turning handle.

Growing community of inventors

Grevinge, Denmark

Ole Fejer