Wheel chair having foldable back support
OwnerChing Kaoinventor
Life of this patent
Estimating the term…
Abstract
A wheel chair includes a back support pivotally attached to a base frame and having a handle and a hand grip pivotally attached to the handle, a housing is secured to the base frame and includes a chamber to slidably receive a shank which has one end pivotally attached to the back support. An adjustably anchoring device may be used to adjustably anchor the shank to the housing, and to adjustably secure the back support to the base frame to selected angular position. One or more coil springs are engaged onto the shank, and have an inner diameter smaller than an outer diameter of the shank, to allow the springs to be engaged and clamped onto the shank, and to be expanded and released from the shank by a barrel.
Claims14
A wheel chair comprising:
- a supporting base frame including at least one wheel attached thereto, and including a seat provided thereon for supporting users thereon, and including a back support pivotally attached to said base frame with a pivot axle, to allow said back support to be rotated and adjusted relative to said base frame to selected angular position,
- said back support including a handle extended therefrom, and a hand grip pivotally attached to said handle,
- a housing secured to said base frame and having a hollow chamber formed therein,
- a shank slidably received in said chamber of said housing, and including a first end pivotally attached to said back support with a pivot pin, to allow said shank to be pivoted relative to said back support, and
- means for adjustably anchoring said shank to said housing, and to adjustably secure said back support to said base frame to selected angular position.
Dependencies are inferred from the claim text.