SUPPORT ARRANGEMENT

A support arrangement 10, including a platform 12 for supporting an object thereon. The platform 12 is adjustably mounted to an upstanding support 14; and a height adjustment mechanism 16 is provided to facilitate height adjustment of the platform 12 relative to the upstanding support 14. The height adjustment mechanism 16 includes a ratchet 18 pivotably mounted to the platform 12; and at least two vertically spaced ratchet engagement surfaces 28 associated with the upstanding support 14. The height of the platform 12 relative to the upstanding support 14 is selected by engaging the ratchet 18 with a desired ratchet engagement surface from the at least two vertically displaced ratchet engagement surfaces 28. Raising of the platform 12 relative to the upstanding support 14 causes the ratchet 18 to move in a ratcheting motion upon encountering each respective ratchet engagement surface 28. Lowering of the platform 12 relative to the upstanding support 14 requires initially raising the platform 12 to a position such that the ratchet 18 is vertically displaced between adjacent ratchet engagement surfaces 28; then lowering the platform 12 relative to the upstanding support 14 to activate a ratchet disengagement actuator 30, which displaces the ratchet 18 away from the ratchet engagement surfaces 28. The platform 12 is then lowered relative to the upstanding support 14 to a position where the ratchet 18 is located at least slightly below a desired ratchet engagement surface 28; following which the platform 12 is raised to deactivate the ratchet disengagement actuator 30. The platform 12 is then raised until the ratchet 18 engages the desired ratchet engagement surface 28. )0 Ft 4r. I tIh