Abstract: An apparatus is provided for biasing a shaft toward, and releasably securing it in, a predetermined position. The apparatus comprises a magnetic assembly coupled to the shaft for releasably securing the shaft in a predetermined position, a first member coupled to and extending from the shaft for rotating the shaft from the predetermined position, and a spring assembly coupled to the shaft for securing the shaft in the predetermined position.

Abstract: A split flapper check valve includes a torsion spring wear reduction mechanism. In particular, the valve includes a pair of bushings on a shaft to which a pair of valve plates is rotationally mounted. A torsion spring is also mounted on the shaft and is configured to bias the valve plates toward a closed position. The wear reduction mechanism is implemented using a pair of bushings that are disposed between the shaft and the torsion spring.

Abstract: A pressure pickup probe assembly includes a probe housing, a plurality of openings, and a pickup probe. The probe housing is configured to be mounted within, and extend at least substantially across, a flow passage. The probe housing further includes at least an inner surface and an outer surface. The probe housing inner surface defines at least a plenum therein. The plurality of openings is formed in the probe housing, and each opening extends between the probe housing inner and outer surfaces and is in fluid communication with the probe housing plenum. The pickup probe is disposed at least partially within the probe housing, and has at least a first end, a second end, and a bore extending between the first and second ends and that is in fluid communication with the probe housing plenum.