A propulsion system for a manual wheelchair includes a mounting clamp and a propulsion drive unit having a drive wheel assembly and a support suspension. The support suspension is configured to provide linear movement of the drive wheel and drive hub assembly relative to the manual wheelchair. The support suspension includes a linear bearing and slide member assembly having at least one linear bearing and a slide member for accommodating the linear movement of the drive wheel assembly and further includes a resilient suspension member that provides a tractive effort force to the drive wheel. The drive wheel assembly is supported on a carriage that is attached to one of the at least one linear bearing or the slide member and a mounting block is attached to the other. The mounting block has a clamp interface with a locating tab that engages a corresponding mounting slot in the mounting clamp.

The invention relates to a mechanical wheelchair drive, comprising a rotatably mounted lever, a handle fastened to the lever, and a force transfer unit for transferring rotational motion of the lever to a wheelchair wheel, wherein the lever has a variable length and is guided along a closed guide of a guide plate, said guide deviating from the circular form, such that the length of the lever changes during the rotational motion.

The invention relates to an insert for connecting an electrical connector to a wall (9) and to a corresponding method. The insert comprises an electrically conductive bolt (1) having a head (3), which extends along a first longitudinal axis (I), and a shaft (4), which is provided with at least one connecting means (5), and a ring (2), which has a through-opening (7) and extends along a second longitudinal axis (II). The head (3) comprises an outer contour which, at least in regions, is produced by the rotation about the first longitudinal axis (I) of a first line (L1), which is curved with a first radius (R1) and spaced apart from the first longitudinal axis (1). The through-opening (7) comprises an inner contour which, at least in regions, is produced by the rotation about the second longitudinal axis (II) of a second line (L2), which is curved with a second radius (R2) and spaced apart from the second longitudinal axis (II).

A convertible wheelchair system, between a wheelchair configuration and an all-terrain configuration, is provided. Embodiments include a central frame aligned along a central longitudinal axis, the central frame having a front and back bar parallel to each other and orthogonal to the central longitudinal axis, paired side bars aligned with the central longitudinal axis, and paired wheel cages, aligned with the central longitudinal axis and attached to the front and back bars, each wheel cage supporting an axle and a wheel mounted thereon. The system further includes a forward beam alignable with the central longitudinal axis, configured to support a forward wheel, and reversibly attached to the front bar. The convertible wheelchair is in the all-terrain configuration when the forward beam is attached to the frame, and the wheelchair configuration when the forward beam is detached from the frame, the central frame thereby standing without the forward beam.

Various implementations include a wheelchair traction attachment device. The device includes a frame having an arcuately-shaped longitudinal axis, an inner surface, an outer surface opposite and spaced apart from the inner surface. The frame has a first edge extending between the inner and outer surfaces, and a second edge spaced apart from the first edge. At least a portion of the inner surface defines a channel. The device includes at least one first wheel-clip extending radially inwardly from the first edge of the frame relative to the arcuately-shaped longitudinal axis. The device includes at least one second wheel-clip extending radially inwardly from the second edge of the frame relative to the arcuately-shaped longitudinal axis. The device includes a traction portion disposed along at least a portion of the outer surface, the traction portion extending radially outwardly from the outer surface relative to the arcuately-shaped longitudinal axis.

The present disclosure describes a system and method for a providing an assistive driving force to a wheelchair.

Methods are disclosed, according to the present invention, which enable reversible reconfiguration of a wheelchair by a user between a.) an original load-bearing configuration utilizing the conventional caster wheels of the wheelchair, and b.) a modified load-bearing configuration which confers improved functionality to the wheelchair, especially for traversing difficult or uneven terrain.

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.

The specification relates to a mobile exerciser. The mobile exerciser can include a mobile exerciser frame; a foot rest assembly attached to the mobile exerciser frame having a working position and a stored position; and a pedal assembly attached to the mobile exerciser frame having a working position and a stored position. The mobile exerciser can be converted from a push mode to a pedal mode by moving the foot rest assembly into a stored position and the pedal assembly into a working position and the mobile exerciser can be converted from a pedal mode to a push mode by moving the foot rest assembly into a working position and the pedal assembly into a stored position.

The invention relates to a system for coupling an auxiliary element to a wheelchair, said auxiliary element being of the type used to convert a wheelchair into a chair in the form of a tricycle or similar, said system comprising a coupling bar for coupling an auxiliary element and a coupling accessory for coupling an auxiliary element, such that the means for coupling the coupling bar can be fitted into the coupling accessory.