Wheelchair seat back mount assembly and wheelchair therewith

Abstract

An assembly for mounting a seat back shell to a wheelchair seat back cane comprises a first portion attachable to the seat back cane and a second portion attachable to the seat back shell. The portions mate to form a point of attachment by aligning one of the portions with the other portion and displacing one of the portions in relation to the other portion.

1 . An assembly for mounting a seat back shell to a wheelchair seat back cane, the assembly comprising:
 a first portion attachable to the seat back cane, and   a second portion attachable to the seat back shell, the portions mating to form a point of attachment by aligning one of the portions with the other portion and displacing one of the portions in relation to the other portion.   
     
     
         2 . The assembly of  claim 1  wherein the shell is attachable to two spaced apart seat back canes, thus forming two points of attachment. 
     
     
         3 . An assembly for mounting a seat back shell to a wheelchair seat back cane, the assembly comprising:
 a first portion attachable in relation to the seat back cane; and   a second portion attachable in relation to the seat back shell, the second portion being configured to receive the first portion and rotate in relation to the first portion to lock the second portion in relation to the first portion.   
     
     
         4 . The assembly of  claim 3  wherein the first portion comprises a tube clamp that is attachable in relation to the seat back cane. 
     
     
         5 . The assembly of  claim 4  wherein the tube clamp comprises a first part and a second part hinged in relation to the first part. 
     
     
         6 . The assembly of  claim 5  wherein the second part is hinged in relation to the first part in a plurality of positions to accommodate different size seat back canes. 
     
     
         7 . The assembly of  claim 4  wherein the first portion further comprises a mounting block attachable in relation to the tube clamp, the second portion being configured to receive the mounting block and rotate in relation to the mounting block to lock the second portion in relation to the first portion. 
     
     
         8 . The assembly of  claim 7  wherein the mounting block is attachable in relation to the tube clamp in a plurality of positions to adjust the angle of the seat back shell in relation to the seat back canes. 
     
     
         9 . The assembly of  claim 7  wherein the mounting block is pivotally adjustable in relation to the tube clamp in any one of the plurality of positions to accommodate different shaped back canes. 
     
     
         10 . The assembly of  claim 3  wherein the second portion comprises a mounting bracket that is attachable in relation to the seat back shell. 
     
     
         11 . The assembly of  claim 10  wherein the mounting bracket is adjustable in relation to the seat back shell. 
     
     
         12 . The assembly of  claim 10  wherein the mounting bracket is laterally adjustable in relation to the seat back shell. 
     
     
         13 . The assembly of  claim 3  wherein the first portion comprises a mounting block and the second portion comprises a mounting bracket, the mounting bracket comprising a radial opening and an axial opening, the radial opening permitting passage of the mounting block when oriented in a first orientation and preventing passage of the mounting block when oriented in a second orientation, the axial opening restricting axial passage of the mounting block. 
     
     
         14 . The assembly of  claim 13  wherein the mounting block comprises an inner portion and an outer portion, the inner portion comprising a substantially circular shaped portion and a kidney shaped portion with a necked-down portion therebetween, the outer portion defining a first flange, and wherein the mounting bracket is substantially C-shaped and comprises an inner portion defining a second flange, the axial opening being bound by the second flange and having a shape complementary to the mounting block inner portion, the first and second flanges being dimensioned and configured to restrict axial passage of the mounting block inner portion through the mounting bracket. 
     
     
         15 . An assembly for mounting a seat back shell to spaced apart wheelchair seat back canes, the assembly comprising:
 a pair of first portions, the first portions being attachable in relation to the seat back canes; and   a pair of second portions, the second portions being attachable in relation to opposing sides of the seat back shell, the second portions being configured to receive the first portions and rotate in relation to the first portions to lock the second portions in relation to the first portions and thus form a two-point mounting assembly.   
     
     
         16 . The assembly of  claim 15  wherein the first portions each comprises a tube clamp attachable in relation to the seat back canes, the tube clamp comprising a first part and a second part hinged in relation to the first part in a plurality of positions to accommodate different size seat back canes. 
     
     
         17 . The assembly of  claim 16  wherein the first portions each comprises a mounting block attachable in relation to the tube clamp, the second portions being configured to receive the mounting blocks and rotate in relation to the mounting blocks to lock the second portions in relation to the first portions. 
     
     
         18 . The assembly of  claim 17  wherein the mounting blocks are attachable in relation to the tube clamps in a plurality of positions to adjust the angle of the seat back shell in relation to the seat back canes. 
     
     
         19 . The assembly of  claim 15  wherein the second portions each comprise a mounting bracket that is attachable in relation to the seat back shell, the mounting bracket being laterally adjustable in relation to the seat back shell. 
     
     
         20 . The assembly of  claim 15  further comprising a pair of hooks, the hooks each being attachable in relation to the seat back shell below the second portions.