Adjustable Corner Drive Assembly For Window Locking System

1 . A corner drive for a locking system for a vent window comprising:

a body configured to be attached to a window frame at a corner of the window frame, the body comprising:

a first drive track substantially aligned with a first axis and defining a first guide channel;

a second drive track substantially aligned with a second axis perpendicular to the first axis and defining a second guide channel; and

a corner section joining the first drive track and the second drive track, the corner section comprising bearing surface aligned with the first guide channel and the second guide channel;

a transfer spring at least partially slidably disposed against the bearing surface and having a first end slidable along the first axis and a second end slidable along the second axis;

a first adjustment arm received in the first guide channel and moveable or slidable along the first axis, the first adjustment arm having a first proximal end coupled to the first end of the transfer spring;

a second adjustment arm received in the second guide channel and moveable or slidable along the second axis, the second adjustment arm having a second proximal end coupled to the second end of the transfer spring;

wherein at least one of (i) a first length of the first adjustment arm is adjustable within a first adjustment range and (ii) a second length of the second adjustment arm is adjustable within a second adjustment range; and

wherein at least one of the first adjustment arm and the second adjustment arm is configured to be coupled to a lock bar of the locking system.

2 . The corner drive of claim 1 , wherein at least one of the first length of the first adjustment arm and the second length of the second adjustment arm is infinitely adjustable within the first adjustment range and the second adjustment range, respectively.

3 . The corner drive of claim 1 , wherein the first length of the first adjustment arm is adjustable within the first adjustment range; and

wherein the second length of the second adjustment arm is adjustable within the second adjustment range.

4 . The corner drive of claim 3 , wherein the first length of the first adjustment arm is infinitely adjustable within the first adjustment range; and

wherein the second length of the second adjustment arm is infinitely adjustable within the second adjustment range.

5 . The corner drive of claim 1 , wherein at least one of the first adjustment arm and the second adjustment arm comprises:

an outer adjustment bar and an inner adjustment bar;

wherein the outer adjustment bar comprises one of the first proximal end and the second proximal end;

wherein the inner adjustment bar is received in the outer adjustment bar;

wherein the inner adjustment bar is moveable relative to the outer adjustment bar along one of the first axis and the second axis; and

wherein a position of a distal end of the inner adjustment bar relative to the one of the first proximal end and the second proximal end is adjustable.

6 . The corner drive of claim 5 , wherein the outer adjustment bar comprises a first coupling member attached to one of the first end of the transfer spring and the second end of the transfer spring; and

wherein the inner adjustment bar comprises a second coupling configured to be coupled to the lock bar of the locking system.

7 . The corner drive of claim 5 , wherein the outer adjustment bar comprises a downwardly open cross-section defined by an upper wall, two opposing side walls each extending downwardly from an opposite lateral side of the upper wall, and two longitudinally extending side rails;

wherein each of the two longitudinally extending side rail extends from a lower end of a respective side wall of the two opposing side walls and projects laterally outwardly from a longitudinal axis of the outer adjustment bar; and

wherein the two longitudinally extending side rails of the outer adjustment bar are telescopingly received in at least one of the first guide channel of the first drive track and the second guide channel of the second drive track.

8 . The corner drive of claim 7 , wherein the upper wall of the outer adjustment bar comprises an opening extending through a portion of the upper wall;

wherein the upper wall near a distal end of the outer adjustment bar comprises an aperture; and

wherein the corner drive further comprises a fastener disposed through the aperture and fixing the outer adjustment bar to the inner adjustment bar.

9 . The corner drive of claim 8 , wherein the inner adjustment bar comprises a slot extending along a longitudinal axis of the inner adjustment bar; and

wherein the fastener engages the slot.

10 . The corner drive of claim 9 , wherein the slot passes through the inner adjustment bar and extends substantially to a proximal end of the inner adjustment bar.

11 . The corner drive of claim 9 , wherein a lower side of the upper wall of the outer adjustment bar comprises a rib;

wherein the aperture extends through the rib.

12 . The corner drive of claim 1 , wherein:

the first drive track is configured to be attached to a base frame of the window frame and the second drive track is configured to be attached to side jamb of the window frame.

13 . The corner drive of claim 12 , further comprising a plurality of Euro-nuts and a corresponding plurality of screws;

wherein each screw of the plurality of screws threadably engages a corresponding Euro-nut of the plurality of Euro-nuts; and

wherein the first drive track and the second drive track are each configured to be attached to the window frame by the plurality of Euro-nuts and the corresponding plurality of screws.

14 . The corner drive of claim 1 , wherein the corner insert comprises a lubricant and a polymer comprising acetal homopolymer (CH 2 O) n ).

15 . A vent window comprising the window frame, wherein the window frame comprises a head frame, a left side jamb, a right side jamb and a base frame;

a vent operator; and

a window locking system operatively coupled to the vent operator and comprising the corner drive according to claim 1 .

16 . The vent window of claim 15 , wherein the corner drive according to claim 1 is attached to the window frame, wherein the first drive track is attached to the base frame of the window frame and the second drive track is attached to one of the left side jamb and the right side jamb of the window frame.

17 . A method for installing a corner drive according to claim 1 in a vent window having a locking system comprising:

attaching the corner drive according to claim 1 at a corner of a window frame of the vent window;

adjusting at least one of the first length of the first adjustment arm and the second length of the second adjustment arm; and

coupling at least one of the first adjustment arm and the second adjustment arm to a lock bar of the locking system.

18 . The method of claim 17 , wherein the step of adjusting at least one of the first length of the first adjustment arm and the second length of the second adjustment arm comprises adjusting both the first length of the first adjustment arm and the second length of the second adjustment arm.

19 . The method of claim 17 , wherein the step of attaching the corner drive comprises:

attaching the first drive track to a base rail of the window frame with a first fastener and the second drive track to one of a left side jamb and a right side jamb of the window frame with a second fastener; and

wherein the first fastener and the second fastener comprise one of (i) a machine screw and a Euro-nut and (ii) a self-tapping screw.