Furniture levelling device

Abstract

Provided is a device for adjusting the effective length of a table leg. The device includes an upper and a lower member that is rotatably associated with one another and are biased apart by spring means, the upper member including a first downwardly directed ramp spaced apart from a second ratchet ramps associated with the lower member by a wall. The upper member includes one or more pawls adapted to run in the channel between the ramps, and including a formation adapted to engage the ratchet when the desired effective length of the leg plus device has been adjusted.

1 . A device for adjusting the effective length of a leg of a table or other article of furniture, the device including an upper and a lower member that are rotatably associated with one another and biased apart by spring means,
 characterised in that the lower member includes at least one downwardly directed ramp, spaced apart from a second ratchet ramp by a wall, to form a channel,   the upper member including at least one pawl adapted to run in the channel between the ramps, the pawl including a formation adapted to engage the ratchet when the desired effective length of the leg plus device has been adjusted.   
     
     
         2 . A device as claimed in  claim 1  characterised in that the pawl includes a first smooth or curved zone to provide minimum friction with the first ramp and a pointed zone for engagement with the ratchet. 
     
     
         3 . A device as claimed in  claim 1  characterised in that the pawl is located on the inside of the upper member. 
     
     
         4 . A device as claimed in  claim 3  characterised in that the pawl is integrally moulded with the upper member. 
     
     
         5 . A device as claimed in  claim 1  characterised in that the upper member includes two pawls. 
     
     
         6 . A device as claimed in  claim 1  characterised in that the device includes an intermediate member that includes the downwardly directed ramp, and that is non-rotatable with the lower member. 
     
     
         7 . A device as claimed in  claim 1  characterised in that two or more corresponding ramps are provided on each of the members. 
     
     
         8 . A device as claimed in  claim 7  characterised in that three identical and connecting ramps are provided in series on each member in the configuration of saw teeth if laid flat.