Abstract: A steering mechanism is provided that steers by imparting a variable amount of toe or camber to a wheel, and is capable of imparting both toe and camber using a single mechanism. Some versions of the steering mechanism can provide extremely high stability during turns controlled by the simple leaning of the operator. Vehicles using the mechanism are provided, including lean-steered vehicles, and including a three-wheeled mobile elliptically driven device.

Abstract: A steering mechanism is provided that steers by imparting a variable amount of toe or camber to a wheel, and is capable of imparting both toe and camber using a single mechanism. Some versions of the steering mechanism can provide extremely high stability during turns controlled by the simple leaning of the operator. Vehicles using the mechanism are provided, including lean-steered vehicles, and including a three-wheeled mobile elliptically driven device.

Abstract: An apparatus for establishing a sulfide bath includes a sulfide supply means for introducing sulfide into water for a water bath, a water chemistry monitoring means for monitoring at least a sulfide concentration of water from the water bath, an electronic controller connected with the sulfide supply means and the water chemistry monitoring means, wherein the electronic controller is configured to control the sulfide supply means to regulate the sulfide concentration in the water bath based on input from the water chemistry monitoring means. A variation of the apparatus is portable and can be used in connection with existing water baths. Another variation of the apparatus is for preserving biological materials.

Abstract: A mobile wheeled device driven by a user's striding his feet on a pair of footbeds through an elliptical path while applying reciprocal force to a pair of upright arm members. The device may utilize an internal gear system in the rear hub.

Abstract: A steering mechanism is provided that steers by imparting a variable amount of toe or camber to a wheel, and is capable of imparting both toe and camber using a single mechanism. Some versions of the steering mechanism can provide extremely high stability during turns controlled by the simple leaning of the operator. Vehicles using the mechanism are provided, including lean-steered vehicles, and including a three-wheeled mobile elliptically driven device.

Abstract: An apparatus for establishing a sulfide bath includes a sulfide supply means for introducing sulfide into water for a water bath, a water chemistry monitoring means for monitoring at least a sulfide concentration of water from the water bath, an electronic controller connected with the sulfide supply means and the water chemistry monitoring means, wherein the electronic controller is configured to control the sulfide supply means to regulate the sulfide concentration in the water bath based on input from the water chemistry monitoring means. A variation of the apparatus is portable and can be used in connection with existing water baths. Another variation of the apparatus is for preserving biological materials.