An attachable and detachable wheelchair tray with an adjustable work surface is disclosed. The adjustable work surface has two parts connected with a hinge. Part one is a horizontal stationary supporting base and part two is a movable top portion which can be tilted in an angular range of from 90 degrees to 180 degrees in relationship to the horizontal base. There is also an extendible auxiliary supporting rack attached to the movable top portion that allows the user to enlarge or reduce the work surface, thus permitting access to more items, references, publications at a time. All adjustments of the work surface are easily controlled with levers, buttons or foot pedals, called "Ergo Aids" which are located on or in close proximity to the wheelchair tray, in a place that is most convenient for the seated user. Fluid piston cylinders using compressed air, carbon dioxide or nitrogen provide the power required to move and adjust the tray with minimal force being applied to each control. Adjustments to a work surface that were previously very difficult for persons with limited manual dexterity are now easily made because the Ergo Aids require motions that are well within the ability of a seated user.
This invention relates to accessory tray tables for wheelchairs, and in particular to a wheelchair tray with an adjustable work envelope that is controlled ergonomically and claims the benefit of priority to U.S. Provisional Application 60/200,814 filed Apr. 28, 2000.
Systems and methods for a wheelchair tray may include providing a tray portion and a connecting portion attached thereto. The connecting portion may be configured to attach to a wheelchair. The connecting portion may provide the tray portion with a first rotation in a plane substantially parallel to a plane of rotation of a non-pivoting wheel of the wheelchair and a second rotation in a plane substantially perpendicular to the plane of rotation of the non-pivoting wheel. The connecting portion may be releasably fixable against the first rotation.
Systems and methods for a wheelchair tray may include providing a tray portion and a connecting portion attached thereto. The connecting portion may be configured to attach to a wheelchair. The connecting portion may provide the tray portion with a first rotation in a plane substantially parallel to a plane of rotation of a non-pivoting wheel of the wheelchair and a second rotation in a plane substantially perpendicular to the plane of rotation of the non-pivoting wheel. The first rotation of the tray portion may be between a first storage position in which at least most of the tray portion is disposed rearward of an axle of the non-pivoting wheel, a second storage position in which at least most of the tray portion is disposed forward of the axle of the non-pivoting wheel, and a position between the first and second storage positions in which the second rotation is permitted.
