Patent ID: 6145569
Filing Date: 2000-11-14
Classification: E06B

Abstract:
A blind for an arched window wherein said arched window has a semi-circular window frame and a horizontal window sill and wherein said window frame has a center of curvature lying at or below an upper surface of said window sill, said blind comprising:a base mountable onto said upper surface of said window sill,a pivot mounted onto said base so as to be positionable a first distance, vertically above said center of curvature of said window frame when said base is mounted onto said window sill,an arm pivotably mounted to said pivot so as to be pivotable 180 degrees about said pivot in a vertical plane, said vertical plane intersecting said base,an accordion member collapsible and extendible between a base edge of said accordion member and a leading edge of said accordion member by collapsing into a stowed position and unfolding into a deployed position respectively a folded adjacent array of elements extending between said base edge and said leading edge, said base edge mountable to a first side of said upper surface of said window sill, said first side of said upper surface of said window sill extending between said pivot and a first end of said window frame when said base is mounted to said window sill,said leading edge of said accordion member slidably mounted to said arm so as to be slidable relative to said arm in a radial direction relative to said pivot,an arcuate rigid bridgeway mounted to said base, a bridgeway follower on said accordion member slidable over said bridgeway so as to radially position, along an arcuate trajectory corresponding to the shape of said bridgeway, relative to said pivot and said arm, said leading edge and said folded adjacent array of elements as said and is rotated about said pivot in said vertical plane,wherein as said leading edge follows said arcuate trajectory, a radially outermost end of said leading edge is a maximum radial distance from said pivot when said leading edge is horizontal and is a minimum radial distance from said pivot when said leading edge is vertical, wherein said maximum radial distance is greater than said minimum radial distance by said first distance,whereby said blind may be opened and closed without binding at the apex of said window frame.