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US20090295119: Wheelchair advantage mobility system

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Filing Information

Inventor(s) Donald S. Bloswich · Jeffrey R. Clark · Miguel Gallegos · Brian J. Horne · Abraham M. Kearl · Ryosuke Osawa ·
Assignee(s) University of Utah Research Foundation ·
Correspondent THORPE NORTH & WESTERN, LLP. ·
Application Number US11919467
Filing date 04/26/2006
PCT 371 date 06/17/2009
Publication date 12/03/2009
Predicted expiration date 04/26/2026
U.S. Classifications 280/250.1  · 280/304.1  ·
International Classifications A61G500  · B62M114  ·
Kind CodeA1
PCT Application Number WO20PCTUS0616068 - 04/26/2006
19 Claims, 7 Drawings


Abstract

A wheelchair propulsion and braking system (10) includes at least one clutch engagement disk rotatably couplable to a wheelchair frame (14). The clutch engagement disk (32) includes a gear (38) that is rotatable with the clutch engagement disk (32), and a drive chain (40) disposed around the gear (38). A drive wheel (50) is rotatably attachable to a wheel (22) of the wheelchair (12), and operatively attachable to the drive chain (40). The system also includes at least one lever arm (60) that is rotatably couplable to the wheelchair frame (14). The at least one lever arm (60) includes a handle (62) operatively coupled to an upper end (64) of the lever arm (60). The handle (62) is oriented in an accessible position during use. A pair of calipers (70) is operatively coupled to each lever arm (60), and engageable with the at least one clutch engagement disk (32). An actuator (80) is operatively coupled to the handle (62) to actuate the calipers (70), and to engage the clutch engagement disk (32).

Independent Claims | See all claims (19)

  1. 1. A wheelchair propulsion and braking system, comprising: a) at least one engagement disk rotatably couplable to a wheelchair frame of a wheelchair, and including: i) a gear rotatable with the engagement disk; and ii) a drive chain disposed around the gear; b) a drive wheel rotatably attachable to a wheel and coaxial with a wheel axle of the wheelchair, and operatively attachable to the drive chain; and c) at least one lever arm rotatably couplable to the wheelchair frame, and including: i) a handle operatively coupled to an upper end of the lever arm, and oriented in an accessible position during use; ii) a pair of calipers operatively coupled to the at least one lever arm and engageable with the at least one engagement disk; and iii) an actuator operatively coupled to the handle to actuate the calipers and engage the engagement disk to propel, slow and stop the wheelchair.
  2. 12. A wheelchair, comprising: a) a lever propulsion system operatively connected to a drive train system, said drive train system being connected to at least one set of wheels mounted on a wheelchair frame; and b) a disk brake system operatively connected to the lever propulsion system and the drive train system such that actuation of the disk brake system is provided by the lever propulsion system to rotate the at least one set of wheels to propel, slow and stop the wheelchair.
  3. 17. A retrofit kit for modifying a wheelchair, comprising: a) a lever propulsion system including a pair of lever arms, each lever arm having an actuator operatively connected thereto; b) a drive train system including a pair of drive chains and a pair of drive wheels; and c) a disk brake system including a pair of disk brakes.

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