Donald F Grieve, Age 957300 Alpine Rd, La Honda, CA 94020

5180493, Jan 19, 1993

Sep 16, 1991

7/760590

Donald F. Grieve - La Honda CA

Krebs Engineers - Menlo Park CA

B01D 4512
B01D 17038

2105123

Rotating hydrocyclone having an elongated cylinder with a side wall defining a separation chamber. A stationary inlet introduces a mixture of immiscible fluids into the chamber at high velocity in a tangential direction so that the mixture rotates about the axis of the chamber and produces a centrifugal force which tends to separate the fluids in accordance with their specific gravities. The cylinder is rotated about its axis to increase the rotation of the fluids and thereby increase the centrifugal force, with impeller vanes extending radially in an inward direction from the side wall of the cylinder near the inlet enhancing the rotation of the fluids with the cylinder. A first outlet is aligned with the axis of the cylinder for removing a fluid of lesser specific gravity from the chamber, and a second outlet is aligned tangentially with the cylinder for removing a fluid of greater specific gravity from the chamber. A tubular turbulence shield disposed coaxially of the chamber between the inlet and the first outlet and extends axially beyond the impeller vanes for isolating the first outlet from the effects of turbulence produced by fluids entering the chamber and interacting with the impeller vanes. The vanes are tapered to produce a gradual acceleration in the rotation of the fluids as they travel away from the inlet.

4208270, Jun 17, 1980

May 7, 1979

6/036386

Donald F. Grieve - La Honda CA
Robert E. Hochscheid - Palo Alto CA

Krebs Engineers - Menlo Park CA

B04C 520

209211

A hydrocyclone assembly suitable for use with high temperature feeds (e. g. , hot petroleum liquids). The hydrocyclone body is made of ceramic material with one end being flanged and cooperating with an inlet head. These parts are clamped against a mounting plate by means including one or more spring members of the distorted washer type (e. g. , Belleville washer). The mounting minimizes breakage of the hydrocyclone body when used with high temperature fluid feed. Some embodiments employ a plurality of hydrocyclones disposed within a common pressure vessel.

5133861, Jul 28, 1992

Jul 9, 1991

7/727665

Donald F. Grieve - La Honda CA

Krebs Engineers - Menlo Park CA

B04C 300

2105121

Hydrocyclone separator for separating liquids of different densities such as oil and water. The separator has an axially elongated chamber, a feed inlet for introducing liquid into the chamber at high velocity in a tangential directionso that the liquid rotates about the axis of the chamber, an overflow outlet for removing the less dense liquid from the chamber, and an underflow outlet for removing the more dense liquid from the chamber. A turbulence shield is positioned between the feed inlet and the axially disposed outlet for isolating the overflow outlet from the effects of turbulence produced by the liquid entering the chamber.