A manual wheelchair including a collapsible frame having a first lateral member that is connected to first and second braces at their respective first ends. A drive wheel axel extends along a first axis of rotation and engages a drive wheel, the first brace, and a portion of a transmission. A push rim axel extends along a second axis of rotation and engages a push rim wheel, the second brace, and a portion of the transmission, which transmits rotation of the push rim to rotation of the drive wheel. The collapsible frame additionally includes a second lateral member that is connected to the first and second braces as their respective second ends. The first and second braces are configured to release the second lateral member to collapse the manual wheelchair.

A manual wheelchair including a collapsible frame having a first lateral member that is connected to first and second braces at their respective first ends. A drive wheel axel extends along a first axis of rotation and engages a drive wheel, the first brace, and a portion of a transmission. A push rim axel extends along a second axis of rotation and engages a push rim wheel, the second brace, and a portion of the transmission, which transmits rotation of the push rim to rotation of the drive wheel. The collapsible frame additionally includes a second lateral member that is connected to the first and second braces as their respective second ends. The first and second braces are configured to release the second lateral member to collapse the manual wheelchair.

Handle consisting of a gripping knob internally provided with a housing cavity in a stable position of a pin, the pin consisting of at least a portion with a larger-diameter section and of a portion with a smaller diameter projecting therefrom. At the top end of the smaller-diameter portion, a retaining member is provided, having a larger diameter with respect to that of the smaller-diameter portion. An elastic bush is housed on the smaller-diameter portion for engagement with the inner surface of the knob. Between the retaining member and the elastic bush, a washer is arranged of a material aimed at minimizing friction.

An extension tool is provided for operating handwheels, such as those found on locomotive handbrakes. The tool includes a spinning handle and a tool body. The handle freely rotates about a longitudinal axis and provides a user with a spinning grip, allowing him or her to quickly and easily turn a handwheel. The tool body includes two or more jaws that clamp to the handwheel. The tool body additionally includes a screw mechanism for selectively tightening or releasing the jaws, in order to respectively attach or detach the tool from the handwheel as desired. Preferably, the screw mechanism further includes a drawbar that extends through an interior of the handle, and is adapted to move longitudinally to rotate the jaws. The drawbar is moved by rotating a threaded drawbar nut at an end of the tool.

A manual wheelchair including a collapsible frame having a first lateral member that is connected to first and second braces at their respective first ends. A drive wheel axel extends along a first axis of rotation and engages a drive wheel, the first brace, and a portion of a transmission. A push rim axel extends along a second axis of rotation and engages a push rim wheel, the second brace, and a portion of the transmission, which transmits rotation of the push rim to rotation of the drive wheel. The collapsible frame additionally includes a second lateral member that is connected to the first and second braces as their respective second ends. The first and second braces are configured to release the second lateral member to collapse the manual wheelchair.