Upright wheelchair

• US 4,685,693 A
• Filed: 09/16/1986
• Issued: 08/11/1987
• Est. Priority Date: 09/16/1986
• Status: Expired due to Fees

• Current Assignee: Carl F. Vadjunec
• Original Assignee: Carl F. Vadjunec
• Inventors: Vadjunec, Carl F.
• Primary Examiner(s): Love, John J.
• Assistant Examiner(s): NOT, DEFINED
• Application Number:
  US06/908,010
• Time in Patent Office: 329 Days
• Field of Search: 280/242 WC, 280/249, 280/648, 297/DIG. 4, 180/74, 5/431
• US Class Current: 280/250.1
• CPC Class Codes: A61G 5/00 Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs chairs with toilet conveniences A47K11/04; devices enabling patients or disabled persons to operate an apparatus or device not forming part of the body A61F4/00; running gear or propulsion features B60K; bicycles specially adapted for disabled riders B62K3/16 ; Invalid chairs having removable seats specially adapted to be transferred with the invalid to a vehicle and support the invalid during use of the vehicle A61G3/02
• CPC Class Codes: A61G 5/026 Cranks or hand wheels
• CPC Class Codes: A61G 5/1091 Cushions, seats or abduction devices
• CPC Class Codes: A61G 5/14 Standing-up or sitting-down aids
• CPC Class Codes: Y10S 297/04 Wheelchair

Abstract

An upright wheelchair that allows the user to be in an upright standing position in the chair and self-propel the chair from that position by use of auxiliary drive wheels inner-connected with the main wheels. An enlarged chair back provides vertical support for the user and is pivoted for horizontal positioning with a fold-out support.

Claims

1. An upright wheelchair having a main support frame, with upstanding side frame configurations, main support wheels and multiple directional wheels on said main support frame, a back body support pivotally secured between said upstanding side frame configurations, inner-drive wheels secured in spaced relation to said main support wheels, secondary drive wheels vertically aligned with said inner-drive wheels and rotatably engaging same in reverse direction and said main support wheels, means on said back body support for locking same in vertical position, means on said back body support for supporting same in horizontal position, means for supporting a chair user in upright position on said back body support, secondary means for securing the user on said back body support, means for locking said main support wheels, inner-drive wheels and said secondary drive wheels.

2. The upright wheel chair of claim 1 wherein said means on said back body support for locking same in vertical position comprises a body support lock and a retaining clamp extending from said back body support and engageable on said main support frame.

3. The upright wheel chair of claim 1 wherein said means for supporting said back body support in horizontal position comprises a back support leg deployable from said back body support and engageable with the ground.

4. The upright wheel chair of claim 1 wherein said means for supporting a chair user in an upright position on said back body support comprises side body supports and multiple straps.

5. The upright wheel chair of claim 1 wherein said means for locking said main support wheels comprises a brake assembly on said main support frame engageable on the main support wheels.