Patent ID: 8763482
Filing Date: 2014-07-01
Classification: E05F,E05Y,F16G,F16H,Y10T

Abstract:
1. A push-pull chain actuator comprising: a housing with a chain exit/entry opening, a push-pull roller chain with an open back, a sprocket arranged to engage rollers of the push-pull roller chain, whilst a portion of the push-pull roller chain is guided around the sprocket, said sprocket causing a polygon effect during operation, a chain guide comprising: wherein said second chain guide part is shaped and dimensioned to neutralize or at least reduce the polygon effect of the sprocket on the push-pull roller chain by including a deviation from a straight line that causes the rollers to follow a meandering path between the chain exit opening and the sprocket, wherein the second chain guide part comprises a path for said rollers formed by a series of interconnected arc shaped sections, wherein geometrical centres of said arc shaped sections are on a same side of the push-pull roller chain as geometrical centres of the first chain guide part, and wherein the geometrical centres of said arc shaped sections are substantially arranged on a line (Y) extending parallel to the predetermined chain exit/entry direction.