WHEELCHAIR ADAPTED TO STAIRCASES
First Claim
Patent Images
1. A wheelchair comprising:
- a frame supporting a seat,two large-diameter rear wheels that are movable relative to the frame between a low position for normal use of the wheelchair and a raised position for negotiating a staircase, andan auxiliary propulsion mechanism for negotiating a staircase, comprisingfront and rear load-supporting elements configured to bear on the steps of the staircase when the rear wheels are in the raised position and the wheelchair has its back to the slope of the staircase, the front load-supporting elements and rear load-supporting elements rotating about separate axes of rotation (X, W), anda transmission system for transmitting a rotation from the large-diameter rear wheels in the raised position to the load-supporting elements in order to turn the latter and cause the wheelchair to move up or down the staircase, depending on the direction in which the rear wheels are turned.
1 Assignment
0 Petitions
Accused Products
Abstract
The invention concerns a wheelchair (1) comprising: a chassis (2) supporting a seat; two rear wheels (4) of large diameter, mobile relative to the chassis between a low position for normal use and a raised position for climbing a staircase, an auxiliary drive mechanism for climbing a staircase.
32 Citations
27 Claims
-
1. A wheelchair comprising:
-
a frame supporting a seat, two large-diameter rear wheels that are movable relative to the frame between a low position for normal use of the wheelchair and a raised position for negotiating a staircase, and an auxiliary propulsion mechanism for negotiating a staircase, comprising front and rear load-supporting elements configured to bear on the steps of the staircase when the rear wheels are in the raised position and the wheelchair has its back to the slope of the staircase, the front load-supporting elements and rear load-supporting elements rotating about separate axes of rotation (X, W), and a transmission system for transmitting a rotation from the large-diameter rear wheels in the raised position to the load-supporting elements in order to turn the latter and cause the wheelchair to move up or down the staircase, depending on the direction in which the rear wheels are turned. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
-
Specification