Patent ID: 6526625
Filing Date: 2003-03-04
Classification: E05D,E05Y,Y10T

Abstract:
An enhanced performance tandem roller assembly for patio doors, comprising:an outer housing; an inner housing; at least two roller grooved wheels affixed to said inner housing to maintain said wheels in a fixed position relative to each other; an adjustment mechanism which locks said inner housing to a desired height position within said outer housing; wherein said outer housing is comprised of a pair of substantially parallel plates overlying said inner housing which limits travel of said inner housing to a vertical path while substantially limiting horizontal movement, and wherein said inner housing is comprised of a pair of parallel plates containing a slot therein which limits travel of said adjustment mechanism to a substantially vertical path, and an upper surface which is substantially parallel to the axis of said wheels wherein at the maximum height of said adjustment mechanism said upper surface abuts said outer housing wherein said abutment maintains the inner housing in a substantially level position relative to said outer housing; at least one interlocking tab; at least one interlocking edge wherein said interlocking tab and said interlocking edge are formed from an upper edge of said parallel plates of said inner housing; at least one corresponding slot; and at least one locking edge wherein said outer housing's substantially parallel plates have at least one upper edge curved inward forming said locking edge and said corresponding slot is formed therein, wherein at the maximum height adjustment said interlocking tab is inserted into said corresponding slot, and said interlocking edge abuts said locking edge to maintain stability and leveling of said inner housing with respect to said outer housing.