Arcuate slide out drive assembly for enclosure

Abstract

A drive assembly for a slide out in an expandable enclosure, the drive assembly comprising a beam attached to a beam guide in an arcuate support rail attachable to the slide out, the beam having a first row of teeth and a second row of teeth thereon, the first row of teeth and the second row of teeth extending, parallel to each other on opposite sides of the beam wherein the teeth in the first row of teeth are offset relative to the teeth in the second row of teeth and a drive gear having a first gear Wheel engageable with the first row of teeth and a second gear wheel engageable with the second row of teeth, and an actuator coupled to the beam to selectively extend and retract the beam. The beam can deflect with respect to the arcuate support rail based on its location and the location of the beam guide to aid in leveling of the slide out.

1 . A drive assembly for a slide out in an expandable enclosure, the drive assembly comprising:
 a beam attachable to the slide out, the beam having a first row of teeth and a second row of teeth thereon, the first row of teeth and the second row of teeth extending parallel to each other on opposite sides of the beam;   a beam guide attached to the beam;   an arcuate support rail enclosing at least a portion of the beam guide;   a drive gear having a first gear wheel engageable with the first row of teeth and a second gear wheel engageable with the second row of teeth; and   an actuator coupled to the beam to selectively extend and retract the beam,   the angular orientation of the slide out Changes according to an angle of the beam in relation to the arcuate support rail based on the position of the beam guide.   
     
     
         2 . The drive assembly of  claim 1 , wherein the teeth in the first row of teeth are offset relative to the teeth in the second row of teeth. 
     
     
         3 . The drive assembly of  claim 2 , wherein the first gear wheel is rotationally offset relative to the second gear wheel. 
     
     
         4 . The drive assembly of  claim 1 , further comprising a belt that drives the drive gear. 
     
     
         5 . The drive assembly of  claim 1 , wherein the arcuate support rail is symmetrical. 
     
     
         6 . The drive assembly of  claim 1 , further comprising a guide coupler that statically fastened to the beam and arranged to rotate about the beam guide. 
     
     
         7 . The drive assembly of  claim 1 , wherein the arcuate support rail defines a channel that receives the beam and supports the beam as it extends and retracts. 
     
     
         8 . The drive assembly of  claim 7  further comprising a stop provided at a rear portion of the channel to adjust the length of the channel. 
     
     
         9 . The drive assembly of  claim 1  wherein the actuator comprises an electric cylinder that interconnects the actuator to the beam, the electric cylinder extending or retracting the beam from the arcuate support rail. 
     
     
         10 . The drive assembly of  claim 1 , wherein the actuator further comprises an antenna. 
     
     
         11 . The drive assembly of  claim 10 , the actuator being capable of remote operation. 
     
     
         12 . The drive assembly of  claim 1 , wherein the drive gear having the first gear wheel and the second gear wheel is mounted on a common hub. 
     
     
         13 . The drive assembly of  claim 12 , wherein the common hub further comprises a support wheel that engages the beam between the first row of teeth and the second row of teeth to allow free movement of the beam in an axial direction. 
     
     
         14 . The drive assembly of  claim 13 , wherein the support wheel is mounted on at least one bearing so that the support wheel rotates independently of the hub. 
     
     
         15 . The drive assembly of  claim 12  further comprising a stub shaft that axially extends from the common hub and is connected to the common hub such that rotation of the stub shaft causes the first gear wheel and the second gear wheel to rotate and drive the beam. 
     
     
         16 . The drive assembly of  claim 15  further comprising a cross member that couples the stub shaft to a second drive assembly, the cross member synchronizing the drive assembly and the second drive assembly. 
     
     
         17 . An expandable enclosure comprising:
 an enclosure;   a slide out extendable from the enclosure; and   a drive assembly comprising:
 a beam attachable to the slide out, the beam having a first row of teeth and second row of teeth thereon, the first row of teeth and the second row of teeth extending parallel to each other on opposite sides of the beam, 
 a beam guide attached to the beam, 
 an arcuate support rail enclosing at least a portion of the beam guide, 
 a drive gear having a first gear wheel engageable with the first row of teeth and a second gear wheel engageable with the second row of teeth, and 
 an actuator coupled to the beam to selectively extend and retract the beam, 
 the angular orientation of the slide out changes according to an angle of the beam in relation to the arcuate support rail based on the position of the beam guide. 
   
     
     
         18 . The expandable enclosure of  claim 17 , wherein the enclosure is a self-powered or towable vehicle. 
     
     
         19 . The expandable enclosure of  claim 17 , wherein the teeth in the first row of teeth are offset relative to the teeth in the second row of teeth. 
     
     
         20 . The expandable enclosure of  claim 19 , wherein the first gear wheel is rotationally offset relative to the second gear wheel.