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US 5,845,363 AGranted
Adjustable roller assembly
AssigneeQuanex Corporation
InventorsMaitland J. Brempell, Laurence P. Armstrong, Petros Z. Mantarakis
Life of this patent
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AssigneeQuanex Corporation
InventorsMaitland J. Brempell, Laurence P. Armstrong, Petros Z. Mantarakis
Estimating the term…
An adjustable roller assembly for sliding doors including a housing adapted to be snap-fit into a recess provided in the upper or lower surface of a door frame, the housing defining a cavity which is open at the lower end. A roller carrier is mounted in the housing cavity and is vertically biased outwardly by one or more coil springs. Rotatably mounted within the roller carrier is a roller adopted to travel along a track. A base plate is disposed within the housing and is connected to a rack member. The rack member is provided with teeth which engage and cooperate with the gear teeth of an adjustment gear extending laterally through both sides of the housing. An engagement slot, adapted to receive a screwdriver or similar tool, is provided in at least one end of the adjustment gear. Vertical adjustment of the base plate may be achieved by rotating the adjustment gear, which vertically moves the rack member and its connected base plate. The position of the base plate within the housing limits the upward vertical movement of the roller carrier and roller. In the lower position, the base plate is located so as to virtually eliminate any travel or upward movement of the roller carrier and roller. In the upper position, the location of the base plate allows for maximum travel of the roller carrier and roller. The roller assembly can be adjusted after the sliding door is positioned on the track to eliminate or reduce slack and prevent door derailment.
An adjustable roller assembly for sliding doors including a housing adapted to be mounted in a recess in a door frame, said housing defining a cavity therein and having an opening at the lower end thereof;
The adjustable roller assembly of claim I including a position locking means associated with said housing and said roller carrier for selectively retaining the roller carrier in a vertically upward position whereby said roller member is substantially concealed with said housing.
The adjustable roller assembly of claim I in which said roller carrier includes one or more outwardly extending barbs engageable with said housing , so as to limit the downward travel of said roller carrier with respect to said housing to retain said roller carrier within said housing.
The adjustable roller assembly of claim I in which said roller defines a groove around the outer periphery thereof adapted to receive a rail of a track.
The adjustable roller assembly of claim I in which said resilient biasing means consists of one or more coil springs disposed between said housing and said roller carrier.
The adjustable roller assembly of claim I including locking means associated with said housing for securing said housing in the recess of a door frame.
Dependencies are inferred from the claim text.