Window operator having a linear drive mechanism

A window operator in combination with a window frame, the window operator comprising:

• an elongate substantially flat mounting base;
• an elongate threaded member rotatably mounted on the mounting base;
• a drive mechanism coupled to the elongate threaded member;
• a nut threaded on the elongated threaded member;
• a drive arm coupled to the nut and an input shaft coupled to the drive mechanism, wherein the mounting base is located within a cavity in the window frame with the input shaft and the drive arm extending outwardly from said cavity;
• an arm pivotally mounted about a pivot axis that is fixed in position relative to the window frame;
• first and second couplings respectively attaching the drive arm and the arm at separate spaced apart positions to a window sash hingedly mounted with the window frame;
• and
• a link coupling pivotally mounted to the arm and the drive arm.

A window operator comprising:

• a mounting base;
• an elongate threaded member located on the mounting base for rotation about a longitudinal axis of rotation;
• a threaded element located on the elongate threaded member;
• a drive arm pivotally coupled to the threaded element by a pivot coupling;
• a link pivotally coupled to an end of the drive arm which is distal from the pivot coupling;
• a sash attachment mounted to the link;
• an arm pivotally coupled to the mounting base by a pivot coupling, said arm being of longer length than said drive arm;
• an end of the arm remote from the pivot coupling the arm to the mounting base being pivotally coupled to a slider mount for mounting with a window sash;
• and
• a connection link pivotally coupled to the drive arm adjacent said pivot coupling said drive arm to said threaded element and pivotally coupled to said arm adjacent the pivot coupling said arm to the mounting base.

A window operator, comprising:

• a drive mechanism;
• a drive element movable on a rectilinear path by the drive mechanism;
• a first linkage of which a primary point of rotation is fixed relative to the drive mechanism;
• a first mounting for attachment of the first linkage to a window sash at a first position;
• a first pivot coupling pivotally coupling said first mounting to said first linkage;
• a second linkage connected to the drive element;
• a second mounting for attachment of the second linkage to the window sash at a second position which is closer to a side of the window sash which is hinged to a window frame than the first position;
• a second pivot coupling pivotally coupling said second mounting to said second linkage;
• and
• an interconnection linkage extending between and pivotally coupled to the first and second linkages.

A window operator in combination with a window frame the window operator comprising:

• a mounting base located within a cavity in the window frame;
• an elongate threaded member mounted on the mounting base for rotation about a longitudinal axis of rotation;
• a drive input shaft drivingly connected to the threaded member, said drive input shaft extending through a part of the window frame to be accessible externally of the cavity;
• a threaded element located on the elongate threaded member;
• a drive arm pivotally coupled to the threaded element by a pivot coupling;
• a link pivotally coupled to an end of the drive arm which is distal from the pivot coupling;
• a sash attachment mounted to the link;
• an arm pivotally coupled to the mounting base by a pivot coupling, said arm being of longer length than said drive arm;
• an end of said arm remote from the pivot coupling the arm to said mounting base being pivotally coupled to a slider mount;
• and
• an interconnecting link pivotally coupled to the drive arm adjacent said pivot coupling said drive arm to said threaded element and pivotally coupled to said arm adjacent the pivot coupling said arm to the mounting base.