Abstract: A snowplowable pavement marker includes a frame member having primary spaced keel members with ramp surfaces which have upwardly inclined contours beginning at a forward end portion of each keel member and extending at a first acute angle, then transitioning to a second portion having a second acute angle which is greater than the first angle. Further, the frame member includes an auxiliary keel member having ramp surfaces disposed between the primary keel members and having the same contour as the primary ramp surfaces. The auxiliary keel member ramp surfaces extend inwardly of the frame member to a point proximate the marker's reflector and serve to prevent damage by a snowplow blade set at a wide angle to the direction of blade travel. Advantageously, the contour of ramp surfaces permits a higher frame member installation above the pavement and allows for greater exposure of the reflector.

Abstract: A turbine wheel for a turbocharger or the like is mounted to an impeller shaft and optionally an additional drive shaft by annular rows of coupling teeth preferably of the CURVIC.TM. coupling type having radially and rotationally locking convex sided and concave sided interlocking teeth. Flexible webs connecting coupling rings on the turbine allow thermo and mechanical growth of the turbine wheel without excessive deflection of the coupling rings and the associated shaft flanges. A single central stud threaded into one of the shafts and retained by a bolt against the other maintains the components in assembly with the coupling teeth fully engaged. A radial slot formed in the coupling flange for one of the shafts prevents thermal distortion of the flange from substantially affecting an adjacent thrust bearing portion of the flange. The arrangement simplifies rotor assembly and avoids the need for rebalancing after disassembly and reassembly.