Abstract: A back support includes an anchor plate attachable to a back frame of a wheelchair and a spanning plate securable to the anchor plate in a range of vertical positions to adjust a height of the back support. The spanning plate is secured to the anchor plate by a fastener secured through an aperture in the anchor plate and attached to a laterally extending bar selectively engageable with the spanning plate in a plurality of discrete vertical positions.

Abstract: A seat assembly includes a seat frame, a back frame defining a back plane pivotally connected to the seat frame at a pivot joint, a back support slideably secured to the back frame, and a back support adjusting mechanism. The back support adjusting mechanism includes a first linking member coupling the back support to the seat frame and pivotable about the pivot axis, and a first slide member slideably supported by the back frame and operatively connected to the first linking member. A second slide member is affixed to the back support and slideably supported by the back frame. A second linking member operatively connects the first and second slide members. Pivoting movement of the back frame from the upright position to the reclined position slides the first slide member away from the pivot axis, causing the second linking member to slide the back support toward the pivot axis.

Abstract: A seat assembly includes a seat frame, a back frame 320 defining a back plane pivotally connected to the seat frame at a pivot joint, a back support 310 slideably secured to the back frame, and a back support adjusting mechanism. The back support adjusting mechanism includes a first linking member 355 coupling the back support to the seat frame and pivotable about the pivot axis, and a first slide member 351 slideably supported by the back frame and operatively connected to the first linking member. A second slide member 354a is affixed to the back support and slideably supported by the back frame. A second linking member 352 operatively connects the first and second slide members. Pivoting movement of the back frame from the upright position to the reclined position slides the first slide member away from the pivot axis, causing the second linking member to slide the back support toward the pivot axis.

Abstract: A seat assembly for a conveyance, such as a wheelchair, that allows the user to set the recline angle of the seat back at a seating position, fold the seat back down to a folded position and back up to the seating position, such that the seat back is returned to the seating position at the user selected recline angle R unless the recline angle is adjusted by the user. The user selected recline angle R is not disturbed by folding the seat back from the seating position, to the folded position 106, and back to the seating position.

Abstract: A seat assembly for a conveyance, such as a wheelchair, that allows the user to set the recline angle of the seat back at a seating position, fold the seat back down to a folded position and back up to the seating position, such that the seat back is returned to the seating position at the user selected recline angle R unless the recline angle is adjusted by the user. The user selected recline angle R is not disturbed by folding the seat back from the seating position, to the folded position 106, and back to the seating position.