Robert M Maddock, 40Lake Elsinore, CA

3964516, Jun 22, 1976

Sep 9, 1975

5/611762

Robert Merrill Purton - Cerritos CA
Robert Brent Maddock - Cerritos CA

Dresser Industries, Inc. - Dallas TX

F16K 4708

13762538

The control valve described is a three-position valve that has been designed for use in decoking operations. The hollow body of the valve has been fitted with a sleeve that includes: a plurality of apertures adjacent the inlet of the valve that are arranged in communication with a first outlet; a second plurality of apertures that are spaced from the first apertures and arranged to be in communication with the second outlet of the valve; and, a plurality of relatively large perforations that extend through the sleeve and are located between the two sets of apertures and in communication with the first outlet. An elongated valve member is movably located within the sleeve. The valve member has a passageway extending therethrough so that when the valve member is in a first position, the fluid communicates from the inlet to the second outlet of the valve providing restricted flow permitting the pump connected therewith to continue to recirculate the fluid utilized in decoking through the second set of apertures. In a second position of the valve member, the decoking fluid flows through the first apertures purging and filling the decoking lines and simultaneously flowing through the valve member outwardly through the second set of apertures for recirculation as required. In the third position of the valve member, the perforations in the sleeve are open and the second set of apertures are closed so that substantially unrestricted flow is provided through the perforations to the first outlt from the valve to provide the necessary volume and pressure to perform the decoking operation.

4004613, Jan 25, 1977

Sep 9, 1975

5/611761

Robert Merrill Purton - Cerritos CA
Robert Brent Maddock - Cerritos CA

Dresser Industries, Inc. - Dallas TX

F16K 4700

1376253

The valve described herein, includes a hollow valve body having inlet and outlet passageways extending into the body and a valve member positioned in the body for movement between open and closed positions. A plurality of orifice members are disposed between the inlet and the outlet so that fluid flowing through the valve must pass therethrough. The orifice members are arranged so that fluid flow from inlet to the outlet must follow a tortuous path through a series of orifices. The orifices are sized to restrict fluid flow and thus reduce the pressure as the fluid flows through the valve. Also, the relatively long tortuous flow path is provided so that the pressure is reduced over a considerable distance with as little noise as possible. The orifice members are arranged so that the inlet to each series of members is through an annular space that is narrower than the smallest of the orifices so that any particle passing through the annular space will pass through the valve.

4098271, Jul 4, 1978

Dec 3, 1976

5/747228

Robert W. Maddock - Fountain Valley CA

McDonnell Douglas Corporation - Long Beach CA

A62B 714

1281423

A flow indicator for use in a continuous flow type oxygen apparatus. The flow indicator constructed of a flexible chamber and restrictor to give an immediate visual indication of a minimum acceptable oxygen flow within the system.