Abstract: A primary pilot relief valve senses a predetermined tank pressure of a fluid pressure source and connects that source to one sealed chamber on one side of an actuating piston fixed to, but fluid isolated from, the main poppet which is maintained in valve closed position within a main valve body also open to the fluid pressure source, by fluid pressure acting within another chamber on the opposite side of the actuating piston, which, being isolated from the pressure changes which occur as the main valve opens, can rapidly modulate the fluid flow. A secondary pilot relief valve controls the pressure in the one chamber if the fluid source pressure drops below a predetermined lower pressure from that initiating primary pilot valve operation as a result of source pressure drop due to opening of the main valve poppet caused by failure of the primary pilot valve, to thereby control the tank pressure at a lower but acceptable level.

Abstract: A disconnect composed basically of two halves each consisting of a poppet valve operable to isolate fluid with essentially zero fluid loss. The two halves are coupled together by a quickly releasable coupling which may be either a coupling ring tightened or loosened by a twisting motion, or a clamp operated by a pivoted handle. In either case an interlock device is provided to prevent disconnecting the two halves until both valves are in closed condition.The "positive" feature of the device is one requiring a valve closing step before a disconnect step, and takes structural form in an eccentric lobe mounted on the valve operating stem. If some obstruction prevents the poppet from moving to its seat, the eccentric lobe cannot be rotated to the closed position, and the interlock prevents a disconnect.

Abstract: A cylindrical flow tube of tapered cross section bears a spherical valve poppet on one side and is mounted within the valve casing for rotation between an axially in-line position relative to an annular valve seat and a position at right angles thereto, the flow tube acting to spring bias the valve poppet against the valve seat. Translation and rotation plates are sequentially clutch driven by an interposed drive plate and carry individual pinions for driving racks associated with concentric rotation and translation shafts for pivoting the flow tube and the spherical poppet and seating the poppet in sequence during valve closing. The sequence control mechanism is hermetically sealed from the translation and rotation shafts.

Abstract: The inner, gate rotating shaft of a pair of concentric shafts on a driving side of a spherical valve housing rotates a valve gate freely supported for rotation on the same side by the outer, translation shaft of the pair and on the driven side by a single translation shaft. Both translation shafts have an eccentric portion about which the gate valve rotates. An arcuate torsion beam is mechanically coupled at its ends to the two translation shafts and lies to the side of the spherical valve housing opposite that of the gate. By selectively locking the gate rotating lever and driving the gate translation lever or vice versa, the spherical gate is rotated freely about the stationary translation shafts to and from a position outside of the flow path and at right angles thereto or axially cammed into contact with a coaxial valve seat by rotation of both translation shafts.