Morley Virgil Friedell
Engineers at Store Ln, Stevensville, MT

4112970, Sep 12, 1978

Feb 11, 1977

5/767928

Morley V. Friedell - Stevensville MT

F16K 31363

1374895

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.

4103712, Aug 1, 1978

Dec 15, 1976

5/750792

James C. Administrator of the National Aeronautics and Space Fletcher
Morley V. Friedell - Stevensville MT

F16L 2900

13763705

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.