Shower door system having anti-torque back plate device
An anti-lift tab of a roller assembly that rides along a fixed rail in use. The anti-lift tab protrudes from the bottom of a face plate having keys molded onto the back face of the face plate which interface with keyways of a castellated nut and shaft component having internal screw threads. A threaded rod is inserted through a bearing seated in the roller assembly. The rod is screwed into the castellated nut and shaft component. A screw attaches the face plate to the castellated nut shaft component and to the roller assembly.
1. An anti-torque and anti-lift roller device that rides on a fixed rail comprising:
a roller with an outer roller diameter and an inner roller diameter wherein a bearing is fixed in the roller and said bearing having a front bearing face, a rear bearing face and an inner bearing opening;
a castellated nut and shaft component having an inner tapped through hole, a shaft face and a castellated nut face, the castellated nut face having keyway slots;
a circular plate having a front face, a rear face, a through hole, an outer circumference and an anti-lift hook, said rear face of the circular plate having protruding keys and said anti-lift hook having a first leg and a second leg, the first leg projecting radially outwardly from the outer circumference of the circular plate in a plane of the circular plate and the second leg of the anti-lift hook projecting from the first leg perpendicular to the plane of the circular plate;
the fixed rail having an upper surface on which the roller rides and a slot disposed below the upper surface into which the second leg of the anti-lift hook is slidably disposed;
a threaded shaft having a first end and a second end, said threaded shaft inserted into and through the inner bearing opening of the bearing fixed in the roller, a nut screwed onto the first end of the threaded shaft and set against a mid-plate, the castellated nut and shaft component screwed onto the second end of the threaded shaft and the shaft face of the castellated nut and shaft component set against the front bearing face of the bearing fixed in the roller;
the rear face of the circular plate secured against the castellated nut face of the castellated nut and shaft component by a screw inserted through the through hole of the circular plate and into the inner tapped through hole of the castellated nut and shaft component such that the protruding keys on the rear face of the circular plate engage with the keyway slots in the castellated nut face prohibiting the circular plate from rotating relative to the castellated nut and shaft component roller the roller is prevented from lifting up and off of the fixed rail by the second leg of the anti-lift hook of the circular plate sliding in the slot of the fixed rail as the device moves on the fixed rail.
2. The anti-torque and anti-lift roller device of claim 1 , wherein the castellated nut face keyway slots and the protruding keys on the rear face of the circular face plate are vertically oriented.
3. The anti-torque and anti-lift roller device of claim 1 , wherein the castellated nut face keyway slots and the protruding keys on the rear face of the circular face plate are horizontally oriented.
4. The anti-torque and anti-lift roller device of claim 1 , wherein the castellated nut face keyway slots and the protruding keys on the rear face of the circular face plate are both vertically and horizontally oriented.