Abstract: A flexible coupling for a drive train, the coupling having a drive yoke, a driven yoke, and a connector for transferring rotational torque between the yokes. The drive and driven yokes are manually inserted into slots in the connector. The drive yoke connects to a drive shaft and the driven yoke connects to a driven shaft. Rotating the drive shaft rotates the drive yoke against the connector causing it to rotate; which in turn transfers torque to and rotates the driven yoke. Surfaces on the yokes and connector that contact one another during rotation define contact surfaces. Portions of the yokes and/or connector having the contact surfaces are obliquely profiled so that contact surfaces on the yokes are complementary to corresponding contact surfaces on the connector, which increases the areas of force transfer between the yokes and connectors to reduce stress concentrations.

Abstract: A photovoltaic system includes a plurality of rectangular-shaped photovoltaic modules and a plurality of separate and spaced-apart support members supporting and orienting the photovoltaic modules in an array on the support surface without penetrating the support surface. The support members are formed of plastic and each of the photovoltaic modules is supported by at least four of the support members. Each of the support members is secured to and supports at least one of the photovoltaic modules but is not directly secured to any of the other support members. Thus the support modules can be utilized to support a wide variety of different sizes of photovoltaic modules. A wind shield is located at the rearward most support members. The wind shield is spaced a distance from the rearward photovoltaic modules and shaped to deflect wind up and over the array of photovoltaic modules.

Abstract: A photovoltaic system includes a plurality of rectangular-shaped photovoltaic modules and a plurality of separate and spaced-apart support members supporting and orienting the photovoltaic modules in an array on the support surface without penetrating the support surface. The support members are formed of plastic and each of the photovoltaic modules is supported by at least four of the support members. Each of the support members is secured to and supports at least one of the photovoltaic modules but is not directly secured to any of the other support members. Thus the support modules can be utilized to support a wide variety of different sizes of photovoltaic modules. A wind shield is located at the rearward most support members. The wind shield is spaced a distance from the rearward photovoltaic modules and shaped to deflect wind up and over the array of photovoltaic modules.