Stair-climbing wheel chair

• US 3,283,839 A
• Filed: 03/02/1965
• Issued: 11/08/1966
• Est. Priority Date: 03/02/1965
• Status: Expired due to Term

• Current Assignee: James G. Beneke, Ronald K. Brown
• Original Assignee: James G. Beneke, Ronald K. Brown
• Inventors: Brown, Ronald K., Beneke, James G.
• Application Number:
  US04/436,478
• Time in Patent Office: 616 Days
• US Class Current: 180/8.2
• CPC Class Codes: A61G 5/061 for climbing stairs
• CPC Class Codes: A61G 5/065 with three or more wheels mounted on a rotary cross member, e.g. spiders or spoked wheels with small wheels at the end of the spokes
• CPC Class Codes: B62D 55/075 Tracked vehicles for ascending or descending stairs, steep slopes or vertical surfacesmagnetic or pneumatic ground-engaging parts B62D55/265; chairs or multi-track cycles specially adapted for invalids A61G5/00

Claims

1. IN A DEVICE FOR ASCENDING OR DECENDING STAIR-LIKE OBSTRUCTIONS TO LEVEL PROGRESS, A FRAME, AN AXLE ROTATABLY MOUNTED IN SAID FRAME ADJACENT ONE END, A PLANETARY DRIVE COMPRISING A SUN FIXED ON SAID AXLE, AT LEAST ONE PLANET MESHING WITH SAID SUN AND AN OUTER RING GEAR MESHING WITH SAID PLANET, MEANS FOR TURNING SAID RING GEAR, MOUNTING MEANS ROTATABLE RELATIVE TO SAID AXLE, AT LEAST THREE GROIUND ENGAGING WHEELS ROTATABLY AND EQUIANGULARLY MOUNTED IN SAID MOUNTING MEANS, AND DRIVE MEANS FOR ROTATING EACH OF SAID WHEELS FROM SAID AXLE, AT LEAST ONE SAID WHEEL BEING POSITIONED TO REST ON THE GROUND WHEN SAID DEVICES IS TRAVELING ON LEVEL GROUND, SAID MOUNTING MEANS AND SAID AXLE BEING FREE TO ROTATE ABOUT THE AXIS OF SAID ONE WHEEL AS A CENTER WHEN SAID ONE WHEEL ENCOUNTERS AN OBSTRUCTION TO LEVEL PROGRESS.