MICHAEL J DUER
Engineers in Zelienople, PA

6367505, Apr 9, 2002

Mar 22, 2000

09/533298

Spiros G. Raftis - Pittsburgh PA
Andre T. Abromaitis - Sewickley PA
Michael J. Duer - Zelienople PA

Red Valve Co., Inc. - Carnegie PA

F16K 1516

137846, 137847, 137850

A check valve having an upstream inlet part mountable on a discharge end of a conduit, a downstream outlet part adapted to prevent backflow of fluid through the check valve, and a transition part located between the upstream inlet part and the downstream outlet part. A longitudinal dimension of the downstream outlet part extending in a direction transverse to a direction of flow is at least approximately 1. 57 times the diameter of the upstream inlet part.

7104279, Sep 12, 2006

May 30, 2001

10/296001

Spiros G. Raftis - Pittsburgh PA, US
Michael J. Duer - Zelienople PA, US

Red Valve Co., Inc. - Carnegie PA

E03B 11/12, F16K 15/14

137592, 137846

An apparatus () for preventing stagnation in a fluid reservoir () comprised of: an inlet/outlet conduit (); a manifold (), which communicates the inlet/outlet conduit () to inlet check valves () and outlet check valves (); the inlet check valves () being positioned on the manifold () and being oriented such that a fluid () will flow from the manifold () through the inlet check valves () to the reservoir () during reservoir filling and fluid flow is prevented through the inlet check valves () during reservoir draining; and the outlet check valves () being positioned on the manifold () and spaced from the inlet check valves () to provide fluid flow within the reservoir () in the general direction from the inlet check valves () to the outlet check valves (), the outlet check valves () being oriented such that fluid flows from the reservoir () through the outlet check valves () into the manifold () during reservoir draining and fluid flow through the outlet check valves () is prevented during reservoir filling.

2012024, Oct 4, 2012

Mar 1, 2012

13/409936

Spiros G. Raftis - Pittsburgh PA, US
Chris Raftis - Carnegie PA, US
Michael J. Duer - Zelienople PA, US

RED VALVE COMPANY, INC. - Carnegie PA

G05D 7/03

137883

A check valve nozzle having at least two discharge ports and providing improved mixing between the discharged fluid and the receiving fluid. The check valve nozzle may be of a “duckbill” type or a “pancake” type. The “duckbill” type may have discharge ports that vary in size, orientation with respect to the longitudinal centerline of the check valve nozzle, and/or construction materials. The “pancake” type may discharge the fluid from the check valve nozzle in a perpendicular, forward, or rearward direction. The check valve nozzle assembly contains a number of check valve nozzles that can vary in size, orientation with respect to the longitudinal centerline of the end cap of the assembly, and/or construction materials.