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A refrigerator shelf includes a glass platform having an encapsulating rim which is integrally formed with a pair of downwardly extending wing members, each having a transverse threaded hole formed therein. A projection member, including an elongated shaft having a threaded section spaced from a tip

A refrigerator shelf includes a glass platform having an encapsulating rim which is integrally formed with a pair of downwardly extending wing members, each having a transverse threaded hole formed therein. A projection member, including an elongated shaft having a threaded section spaced from a tip portion, is provided for each wing member. The threaded section is threadably received in the hole of a respective wing member. The shelf is adapted to be slidably supported upon side wall rails of a refrigerator liner, with the tip portion of each projection member extending beneath a respective one of the rails, thereby preventing tipping of the shelf. The tip portion is also adapted to engage structure on the rail in order to limit the permissible degree of sliding movement of the shelf along the rails.

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A refrigerator shelf includes a glass platform having an encapsulating rim which is integrally formed with a pair of downwardly extending wing members, each having a transverse threaded hole formed therein. A projection member, including an elongated shaft having a threaded section spaced from a tip

A refrigerator shelf includes a glass platform having an encapsulating rim which is integrally formed with a pair of downwardly extending wing members, each having a transverse threaded hole formed therein. A projection member, including an elongated shaft having a threaded section spaced from a tip portion, is provided for each wing member. The threaded section is threadably received in the hole of a respective wing member. The shelf is adapted to be slidably supported upon side wall rails of a refrigerator liner, with the tip portion of each projection member extending beneath a respective one of the rails, thereby preventing tipping of the shelf. The tip portion is also adapted to engage structure on the rail in order to limit the permissible degree of sliding movement of the shelf along the rails. ssembly is coupled to the rocker plate by the spherical bearing. 12. The track tensioning system of claim 11 wherein the frame comprises portions defining a pocket for receiving the first end of the piston and cylinder assembly. 13. The track tensioning system of claim 7 wherein the left pivot plane and right pivot plane are substantially parallel. 14. The track tensioning system of claim 13 wherein the left pivot plane and right pivot plane are substantially vertical. 15. The track tensioning system of claim 13 wherein the rocker plate has a neutral position in which the rocker plate is substantially perpendicular to the left pivot plane and right pivot plane. 16. The track tensioning system of claim 7 wherein the coupling system further comprises a left wheel plate that couples the rocker plate to the left track tensioning wheel and a right wheel plate that couples the rocker plate to the right track tensioning wheel. 17. The track tensioning system of claim 16 further comprising a bolt that couples the left wheel plate to the right wheel plate. 18. The track tensioning system of claim 7 further comprising a left spherical bearing for coupling the left wheel plate to the rocker plate and a right spherical bearing for coupling the right wheel plate to the rocker plate. 19. The track tensioning system of claim 18 wherein the tracked vehicle defines orthogonal X, Y, and Z axes and wherein the rocker plate is pivotable around the X, Y and Z axes. 20. A track tensioning system for simultaneously tensioning left and right tracks on a tracked vehicle, the track tensioning system comprising: a frame; a left wheel plate assembly that is coupled to the frame, the left wheel plate assembly comprising a left wheel that is rotatable around a wheel rotation axis, the left wheel plate assembly being pivotable in a left pivot plane around a left pivot axis that is displaced from the wheel rotation axis, the left wheel plate assembly being arranged and configured to engage the left track; a right wheel plate assembly that is coupled to the frame, the right wheel plate assembly comprising a right wheel that is rotatable around a wheel rotation axis, the right wheel plate assembly being pivotable in a right pivot plane around a right pivot axis that is displaced from the wheel rotation axis, the right wheel plate assembly being arranged and configured to engage the right track; a rocker plate that is coupled to the left and right wheel plate assemblies; a cylinder assembly having a front end and a back end, the front end being pivotably coupled to the rocker plate, the back end being supported by the frame; wherein actuating the cylinder assembly biases the rocker plate and the left and right wheel plate assemblies to tension the left and right tracks. 21. The track tensioning system of claim 20 wherein the left pivot plane is substantially parallel to the right pivot plane. 22. The track tensioning system of claim 21 wherein the left and right pivot planes are substantially vertical. 23. The track tensioning system of claim 21 wherein the rocker plate has a neutral position in which the rocker plate is substantially perpendicular to the left and right wheel plate assemblies. 24. The track tensioning system of claim 20 wherein the left and right wheel plate assemblies are each pivotable in three dimensions relative to the rocker plate. 25. The track tensioning system of claim 24 wherein the left and right wheel assemblies are each coupled to the rocker plate with a spherical bearing. 26. The track tensioning system of claim 20 wherein the rocker plate is pivotable in three dimensions relative to the cylinder assembly. 27. The track tensioning system of claim 26 wherein the rocker plate is coupled to the cylinder assembly with a spherical bearing. 28. The track tensioning system of claim 20, wherein the cylinder assembly moves through a substantially vertical cylinder pivot plane. 29. The track tensioning system of claim 20 wherein th