Abstract: A multi-roller guide that includes a base plate, a cover plate, a plurality of spacers positioned perpendicularly between the base plate and cover plate, a plurality of spacer fasteners coupled to the spacers, and a plurality of roller assemblies secured between the base plate and cover plate and aligned along a roller assembly arc path. Each roller assembly includes a roller coupled to a roller bearing, with the roller bearing having a bearing center passage that receives therein an axle, and wherein the plurality of roller assemblies are secured between the cover plate and base plate via the axle, and wherein each roller is spool shaped including a core portion connecting upper and lower boundary walls, the upper and lower boundary walls extending radially outward from the core portion and including a space therebetween for receiving a portion of a tensile member.

Abstract: An expansion joint includes a pair of tubular fittings joined together by a bellows for accommodating differential movement therebetween. The fittings include balls at respective distal ends thereof which engage complementary sockets fixedly joined to opposite ends of the bellows. The respective ball and sockets additionally accommodate pivotal and rotary movement. The bellows allows pressure and spring forces to engage the sockets against their respective balls for continuously seating the balls in the sockets during operation and maintaining effective seals against leakage.