Chair-drive interface assembly, wheelchair and/or drive

A chair-drive interface assembly for connection to a wheelchair assembly and a drive assembly, the wheelchair assembly including a seating assembly, a back support assembly, a first chair-connection member that extends laterally beneath the seating assembly, and a second chair-connection member that extends laterally beneath the seating assembly and rearward of the first chair-connection member, wherein the first and second chair-connection members are connected together at a fixed spacing from one another by at least one frame member of the wheelchair assembly, the drive assembly including at least one drive wheel, a motor and a battery, the apparatus comprising:

• at least one collar for the first chair-connection member, wherein each of the at least one collar for the first chair-connection member has an aperture that extends laterally and is sized to mount to the first chair-connection member;
• at least one collar for the second chair-connection member, wherein each of the at least one collar for the second chair-connection member is positioned rearwardly of the at least one collar for the first chair-connection member, and has an aperture that extends laterally and is sized to mount to the second chair-connection member;
• a first bracket having a first end that has thereon the at least one collar for the first chair-connection member;
• a second bracket having a first end that has thereon the at least one collar for the second chair-connection member, wherein the first bracket and the second bracket are pivotally connected to each other at a non-zero angle by way of a pivot member that extends laterally, so as to form an angle joint that extends in a longitudinal-vertical plane of the wheelchair assembly;
• and
• a docking assembly that is connected to at least one of the first and second brackets and which extends forwardly from the first and second brackets, wherein the docking assembly includes at least one engagement feature that is shaped to receive at least one drive connector on the drive assembly.