Abstract: 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.

Abstract: 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.

Abstract: A mobile dwelling includes a chassis supported by one or more axles, a shelter frame mounted to the chassis, a plurality of panels supported on the shelter frame enclose a living space. Positioned within the chassis, a plurality of battery modules are operatively isolated from the one or more axles and are adapted to selectively output power for charging a battery pack of an electric tow vehicle. A method for charging an electric vehicle includes providing a mobile dwelling, towing the mobile dwelling with an electric vehicle from a first location to a second location, coupling the battery modules with the electric vehicle and charging the electric vehicle.

Abstract: 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.

Abstract: A control system for a personal mobility vehicle has a menu structure that can be ordered so that commonly used areas of the menu are grouped together, thus avoiding the need to frequently navigate through seldom-used portions of a standard menu structure.

Abstract: A personal mobility vehicle includes a frame, two or more ground engaging rear wheels connected to the frame and configured to support the frame, and a single ground engaging front wheel connected to the frame and configured to steer the personal mobility vehicle. A drive motor is connected to either the front wheel or the rear wheels, the drive motor being configured to drive the scooter. A steering mechanism is connected to the front wheel and includes a user actuated steering member, the steering mechanism being configured to provide a variable steering ratio, wherein the ratio of the angle of the user actuated steering member from an initial position to the angle of the front wheel from an initial position varies as the user actuated steering member is turned.

Abstract: A personal mobility vehicle includes a frame, a ground engaging front wheel connected to the frame and mounted for rotation about a substantially, vertical axis so the front wheel is a steerable wheel, and a drive motor connected to either the front wheel or the rear wheels, the drive motor being configured to drive the scooter. Two or more ground engaging rear wheels are connected to the frame and configured to support the frame. A tiller assembly is connected to the frame and configured to allow the vehicle user to steer the front wheel. A steering hub is connected to the frame and configured to rotatably support the tiller assembly, wherein the steering hub is forward of and spaced apart from the front wheel.

Abstract: A scooter has a frame including a footrest, the footrest having a front edge. Two or more ground engaging rear wheels are connected to the frame and configured to support the frame. A ground engaging front wheel is connected to the frame and mounted for rotation about a vertical axis so that the front wheel is a steerable wheel, the front wheel having a center line. The center line of the front wheel is positioned rearward of the front edge of the footrest and forward of the rear wheels. A drive motor is connected to either the front wheel or the rear wheels, the drive motor being configured to drive the scooter. A steering mechanism is connected to the front wheel and configured to steer the front wheel.

Abstract: A personal mobility vehicle has a frame, a ground engaging front wheel connected to the frame and configured to simultaneously drive and steer the personal mobility vehicle, a drive motor connected to the front wheel and configured to drive the front wheel, a steering mechanism connected to the front wheel and configured to steer the front wheel, and a rear suspension including two or more ground engaging rear wheels mounted to support the frame. One or more rear anti-tip wheels are mounted to support the frame. A mechanism for distributing some of the weight of the vehicle away from the rear wheels and onto the rear anti-tip wheels is provided, thereby retarding the unloading of weight from the front wheel.

Abstract: A wheelchair includes a frame, and a front pivot arm pivotally mounted to the frame at a front pivot point, the front pivot arm having a caster for supporting the frame. A rear pivot arm is pivotally mounted to the frame at a rear pivot point, the rear pivot arm having a caster for supporting the frame. A ground engaging mid-wheel drive wheel is connected to the frame. A linkage connects the front and rear pivot arms to each other in a manner such that an upward or downward rotation of one of the pivot arms about its pivot point causes rotation of the other pivot arm about its pivot point in an opposite rotational direction.

Abstract: An electronic control system has the ability to programmably assign or map various input functions to different output functions. This allows for a much greater degree of customization of the control system for an individual user and allows inputs to be matched to different outputs to suit the individual users needs more optimally.

Abstract: An electronic control system has the ability to programmably assign or map various input functions to different output functions. This allows for a much greater degree of customization of the control system for an individual user and allows inputs to be matched to different outputs to suit the individual users needs more optimally.

Abstract: A control system for a personal mobility vehicle having a menu structure that can be ordered so that commonly used areas of the menu are grouped together, thus avoiding the need to frequently navigate through seldom-used portions of a standard menu structure.

Abstract: A double-talk detector (109) for an acoustic echo canceler (104) of a VoIP terminal (101) converts (216,226) received far-end signals (212) and transmitted near-end signals (222) into the frequency domain and high-pass filters out (218,228) low-frequencies representing noise to obtain a complex reference signal and a complex error signal, respectively. It then correlates (230) the complex signals and computes (232) the instantaneous error energy (234) and smoothed (long-term average) error energy (235) of the complex error signal. If the convergence value is below 0.06 (300), the signals are converged and double-talk detection is enabled (306). If the convergence value is above 0.09 (312), the signals are diverged and double-talk detection is disabled (316). If double-talk detection is not enabled, an error threshold (236) is set (304,318) to the value of the smoothed error energy.

Abstract: A double-talk detector (109) for an acoustic echo canceler (104) of a VoIP terminal (101) converts (216,226) received far-end signals (212) and transmitted near-end signals (222) into the frequency domain and high-pass filters out (218,228) low-frequencies representing noise to obtain a complex reference signal and a complex error signal, respectively. It then correlates (230) the complex signals and computes (232) the instantaneous error energy (234) and smoothed (long-term average) error energy (235) of the complex error signal. If the convergence value is below 0.06 (300), the signals are converged and double-talk detection is enabled (306). If the convergence value is above 0.09 (312), the signals are diverged and double-talk detection is disabled (316). If double-talk detection is not enabled, an error threshold (236) is set (304,318) to the value of the smoothed error energy.

Abstract: A voice-activity detector (VAD 104) takes (214) a currently-received set and a previously-received set of samples of a time-domain (voice) signal, converts (216) them into a frequency-domain representation of the signal, filters out (218) negative and low (noise) frequencies, weights (220) the energies of frequency bins (ranges) of the remaining frequencies proportionately to their frequencies, and computes (220) the total power of the ranges. It first initializes (226) by determining (304, 306) if power peaks of any of the ranges exceed a first threshold (ceiling 228); if not, it lowers (302) the ceiling and continues initializing, and if so, it ends initializing (308), indicates (334) that voice has been detected, sets (330) the ceiling to the highest peak, and stores (332) the total power as a “smoothed” power.