Abstract: A connector fitting of the cantilever camming and clamping type having a ferrule secured in the main body bore thereof, the ferrule having an end received in one end of a tubular, usually plastic, member as the tubular member is installed. The ferrule provides radial force backup preventing collapse of the tubular member. It seals with the bore of the main body and with the tubular member. The cap bolt part of the fitting may have a tapered or a straight inner surface arranged to engage the outer wall of the tubular member in gripping relation.

Abstract: A brake system using a pair of brake apply and release force units, the units having electric motors with non-backdriveable mechanical output members to supply the needed brake apply force to limit of capability of the motors. Piezoelectric elements that generate high forces with low expansion during rapid rates of change of applied voltage are positioned in brake apply force-transmitting series with the motor output members. These elements are alternately energerized with applied voltage and deenergized, in opposite phase relation. The piezoelectric expansion effect of each energized element is mechanically captured in each energization cycle by the motor unit having the deenergized element so that the brake apply forces actually applied to actuate the brake are increased well beyond the maximum output of the motors.

Abstract: Fittings for cylindrical members such as pipes, tubes, and rods. A nut main body has internal camming surfaces formed by threads on a bore or recess inner surface, and a cap bolt has a through bore, and a longitudinally segmented shank defining clamping legs. External camming surfaces defined by threads on the remote ends of the clamping legs from the bolt head fit within the internal camming surfaces with the bolt head engaging the nut main body so that the internal and external camming surfaces are contained within the nut main body and protected against damage. A cylindrical member fits through the cap bolt bore and into the nut main body recess axially beyond the internal camming surfaces. Further tightening of the cap bolt causes camming action of the camming surfaces to occur, forcing the clamping legs to bend in cantilever fashion so that their remote ends clampingly grip the cylindrical member. Suitable seals are provided to keep the camming surfaces protected.