Jeff Newman

US Patent:

49969064, Mar 5, 1991

Filed:

Apr 24, 1989

Appl. No.:

7/342370

Inventors:

Wallace A. Hanson - Riverdale GA
Jeff Newman - Riverdale GA

Assignee:

United Elevator Corporation - Riverdale GA

International Classification:

F15B 1520

US Classification:

91392

Abstract:

An actuating assembly having a cylinder which receives a plunger defining a fluid restricting means along its lower end. A feed conduit delivers pressurized fluid through a fluid inlet and into the cylinder, which displaces the plunger out of the cylinder. As the plunger is displaced, the fluid restricting means progressively covers the fluid inlet, progressively restricting the rate of fluid flow into the cylinder, and slowing the plunger's displacement.

US Patent:

54961106, Mar 5, 1996

Filed:

Apr 4, 1994

Appl. No.:

8/222682

Inventors:

James W. Geier - Riverdale GA
Jeff E. Newman - Riverdale GA

International Classification:

B01F 910
B01F 1502

US Classification:

366214

Abstract:

An apparatus for mixing a plurality of vessels containing various sample and reagent materials is disclosed. The apparatus comprises mechanisms for holding the vessels and rotating the vessels about an axis. A valve for venting pressure is provided and is controlled by a solenoid that is actuated only when the vessels are in a generally upright position so that liquid or solid contents of the vessels will not escape through the pressure venting valve. Additionally a work station is provided that houses the apparatus of the present invention and allows the user to complete the mixing and extracting process without removing the vessels from the holding tray.