WALTER M PRESZ
Engineering in Wilbraham, MA

2006015, Jul 13, 2006

Jan 11, 2006

11/330695

Walter Presz - Wilbraham MA, US
Stanley Kowalski - Wilbraham MA, US

B05B 1/26, B05B 1/34

239461000, 239463000, 239487000

A fluid nozzle system (nicknamed the “RAP nozzle system”) is disclosed that combines a pulse flow device with a toroidal vortex generator to create a high momentum, self propelling jet for increasing long-range jet impact forces. The RAP nozzle system takes continuous flow normally exited through a nozzle and breaks it into discrete patterns of pulsed flow. The unsteady characteristics of the pulsed flow are then used with either single-stage ejectors, multi-stage ejectors or other devices to increase the momentum and/or the lateral size of the individual pulses. These fluid pulses are then used to generate a jet with large scale, stable toroidal vortices which travel long distances and apply large forces at impact. Unlike the prior art, such toroidal vortices are stable, carry large flow momentum, and propel themselves through the air (or other fluid) at a speed approximately ¼ the pulsed velocity of the fluid used to generate the vortices. Furthermore, the toroidal vortices travel with minimal mixing and minimal losses. Tests conducted have demonstrated that these toroidal vortices travel up to 10 times the distance of current continuous flow jets and can deliver an order of magnitude larger force to move particles at large distances from the nozzle exit when compared to the same energy, continuous jet. The same toroidal vortices generate stirring mechanisms at impact which can be useful in many applications. The RAP nozzle system can significantly improve the performance of leaf blowers, shop air nozzles, and all other products that utilize jet impact forces for particle movement. The same RAP nozzle system concept can be used in a significant number of other applications where fluid pulsations could be beneficial. Fluid pulsations increase the force of a fluid jet by adding impulsive forces similar to a jack hammer. These unsteady forces can be quite large and are directly related to the velocity of the jet at impact. In an alternate embodiment, the RAP nozzle concept can also carry a secondary fluid over a large distance without mixing the secondary fluid with the ambient fluid. The secondary fluid is carried in the core of the toroidal vortices generated.

5884472, Mar 23, 1999

Feb 4, 1998

/018428

Walter M. Presz - Wilbraham MA
Gary Reynolds - Westfield MA

Stage III Technologies, L.C. - Las Vegas NV

F02K 138, F02K 302

60262

A mixer/ejector suppressor is disclosed for reducing the noise level created by the exhaust flows in gas turbines. In the preferred embodiment, the suppressor comprises a mixing ring of alternating lobes attached to the engine's tailpipe; an ejector shroud mounted onto the mixing ring; and a plurality of arcuate gaps, between the mixing ring and ejector shroud, that permit ambient air to be entrained into the shroud. The preferred mixing ring has ten curved lobes of alternating designs. Five of the mixing lobes are shallow, with contours similar to those of mixing lobes in an earlier TSMEC version, disclosed in a related U. S. utility patent application, Ser. No. 08/729,571. The other five lobes are much longer, and they are designed to penetrate deeply into the engine's hot core flow. Together, the ten lobes rapidly mix (mostly at supersonic conditions) the engine exhaust flows with secondary ambient air inside the shroud. The lobes thereby increase the spread rate of the exhaust jet, dissipate its velocity and greatly decrease the core length of the exhaust jet.

4971768, Nov 20, 1990

Dec 15, 1987

7/132395

Robert H. Ealba - Grosse Pointe Farms MI
Robert W. Paterson - Simsbury CT
Walter M. Presz - Wilbraham MA
Michael J. Werle - West Hartford CT

United Technologies Corporation - Hartford CT

F01N 310, F01N 708, B01D 5336

422176

A thin, convoluted wall member disposed upstream of the inlet of a diffuser generates large-scale vortices having axes in the downstream direction. The vortices enhance mixing within the diffuser and can also energize the boundary layer, thereby improving diffuser performance and delaying the onset of stall. Greater diffusion angles without stall are possible. The member itself creates low losses.

4813633, Mar 21, 1989

Dec 29, 1986

6/947166

Michael J. Werle - W. Hartford CT
Walter M. Presz - Wilbraham MA
Robert W. Paterson - Simsbury CT

United Technologies Corporation - Hartford CT

B64C 1118

244130

An airfoil has a plurality of spaced apart, U-shaped troughs in either or both its suction or pressure surface in the trailing edge region. Each trough extends in a direction generally parallel to the bulk fluid flow in its vicinity near the airfoil surface and has an outlet at the trailing edge. The troughs increase in depth from their inlets toward their outlets, the maximum depth being no more than half the trailing edge thickness. The troughs are spaced apart, sized and configured to flow full over their entire length and to cause fluid to flow into the space immediately behind the trailing edge, thereby reducing base drag.

4815531, Mar 28, 1989

Nov 2, 1987

7/117460

Walter M. Presz - Wilbraham MA
Robert W. Paterson - Simsbury CT
Michael J. Werle - West Hartford CT

United Technologies Corporation - Hartford CT

F28D 104, F28F 300, F28F 120

165151

In a heat exchanger, a convoluted plate disposed in a fluid stream flowing in an axial direction generates adjacent counterrotating, large scale axial vortices downstream thereof adjacent a wall over which the fluid flows. The convoluted plate is constructed to produce minimum pressure losses, while the vortices increase the heat transfer rate between the fluid and the wall.

5058703, Oct 22, 1991

Dec 27, 1988

7/289866

Robert H. Ealba - Grosse Pointe Farms MI
Robert W. Paterson - Simsbury CT
Michael J. Werle - West Hartford CT
Walter M. Presz - Wilbraham MA

United Technologies Corporation - Hartford CT

F01N 114

181228

To reduce noise, an automotive exhaust tailpipe has a convoluted surface at or near its outlet to generate pairs of counterrotating axial vortices within the exhaust gases just before or just as the gases exit the tailpipe. The convoluted surface may be the internal surface of the tailpipe, or a thin-walled convoluted member may be disposed within the tailpipe near its outlet end.

4776535, Oct 11, 1988

Nov 5, 1987

7/117770

Robert W. Paterson - Simsbury CT
Michael J. Werle - West Hartford CT
Walter M. Presz - Wilbraham MA

United Technologies Corporation - Hartford CT

B64C 138

244130

A body adapted to move downstream through a fluid has a downstream extending smooth surface terminating at a blunt base. Extending transversely across the smooth surface and disposed upstream of the blunt base is a thin, downstream extending plate closely spaced from the smooth surface. At least the downstream end portion of the plate is convoluted such that its downstream end is wave shaped. The convolutions are designed to generate pairs of counterrotating vortices which delay boundary layer separation from the smooth surface and cause fluid to flow into the space immediately behind the blunt base, reducing base drag on the body. The device generates very little drag of its own.

5076053, Dec 31, 1991

Aug 10, 1989

7/391916

John B. McVey - Glastonbury CT
Roy Pelmas - Glastonbury CT
Robert W. Paterson - Simsbury CT
Walter M. Presz - Wilbraham MA
Michael J. Werle - West Hartford CT

United Technologies Corporation - Hartford CT

F02K 310

60261

In a combustion process streams of fuel, oxidant or combinations of fuel and oxidant pass simultaneously through a combustion region over opposite sides of a plate disposed therein having downstream extending convolutions which create pairs of large scale oppositely rotating vortices. These vortices cause the fuel and oxidant to mix rapidly with each other. A recirculation zone is disposed immediately downstream and adjacent the edge of the convoluted plate, and in one embodiment is created by a step-wise discontinuity in the flowpath. The mixing occurs without introducing large momentum losses and, when the mixture is ignited immediately downstream of the convoluted plate, the flame propagates with a larger than normal spreading angle.

5230369, Jul 27, 1993

Mar 9, 1992

7/847838

Walter M. Presz - Wilbraham MA

United Technologies Corporation - Hartford CT

F15D 100

138 39

Downstream extending convolutions (52) disposed on the inside corner (72) of an angled conduit (50) eliminate or reduce the two-dimensional boundary layer separation region (44) thereby eliminating or reducing the pressure losses associated with the separation region (44). The convolutions (52) may be formed into either the angled conduit wall or in an insert (200) which is positioned on the inside corner surface of the conduit.

4835961, Jun 6, 1989

Apr 30, 1986

6/857908

Walter M. Presz - Wilbraham MA
Robert W. Paterson - Simsbury CT
Michael J. Werle - W. Hartford CT

United Technologies Corporation - Hartford CT

F02K 304

60264

A fluid dynamic pump, such as an ejector, has a common wall which separates a primary high energy fluid flow passage and a secondary low-energy fluid flow passage. The common wall includes a plurality of adjoining lobes extending in the direction of flow to the outlets of the passages at the downstream end of the common wall. A lobe on one side of the wall forms a corresponding trough on the other side. The common wall therefore has a wave-like shape at its downstream end. Primary and secondary fluid flow from the trough outlets on their respective sides of the common wall and are mixed together rapidly in a mixing region downstream of the outlets. A diffuser is located at the downstream end of the mixing region and enhances the pumping ability of the ejector. Secondary fluid is thereby drawn or pumped into the mixing region as a result of this transfer of energy from the primary stream to the secondary stream. Viscous losses are low during the process.