Ronald Michael Struziak, 74843 Frank Smith Rd, Springfield, MA 01106

7140839, Nov 28, 2006

Dec 28, 2004

11/023935

Christopher McAuliffe - Windsor CT, US
Mark L. Harris - Broad Brook CT, US
Brent Merritt - Southwick MA, US
Ronald Struziak - Longmeadow MA, US

Hamilton Sundstrand - Windsor Locks CT

F04D 29/46

415163, 4151711

A diffuser is provided having a spaced apart shroud and backing plate. A diffuser vane is provided between the backing plate and shroud. The vane includes first and second sealing surfaces opposite from one another and adjacent to the backing plate and shroud. Leading and trailing surfaces are arranged opposite from one another and adjoin the first and second sealing surfaces. The first sealing surface includes a first protrusion extending therefrom approximate to the leading surface with a gap extending from the trailing surface to the first protrusion. The second surface includes a second protrusion extending therefrom proximate to the trailing surface with a second gap extending from the leading surface to the second protrusion. The surfaces provide four corners such that the protrusions are arranged on opposite corners from one another to create a pressure differential between the first and second sealing surfaces.

7648279, Jan 19, 2010

Apr 12, 2007

11/786637

Ronald M. Struziak - Longmeadow MA, US
Christopher McAuliffe - Windsor CT, US
Jeffery L. Stark - Niantic CT, US

Hamilton Sundstrand Corporation - Rockford IL

F16C 32/06

384103, 384106

A hydrodynamic fluid film journal bearing assembly includes a journal sleeve having a key slot formed therein in a substantially longitudinal direction, a bump foil wrapped in a substantially cylindrical shape adjacent to the journal sleeve and having a bent end portion engaged with the key slot, an intermediate foil wrapped in a substantially cylindrical shape adjacent to the bump foil, a top foil wrapped in a substantially cylindrical shape adjacent to the intermediate foil, a first top foil cutout window formed adjacent to the bent region, and a first end tab formed at a free end of the top foil. The first end tab is wrapped with the top foil in the substantially cylindrical shape of the top foil, and extends into the first top foil cutout window to reduce skewing. The top and intermediate foils are joined at a bent region that engages the key slot.

7648280, Jan 19, 2010

Apr 12, 2007

11/786796

Ronald M. Struziak - Longmeadow MA, US
Christopher McAuliffe - Windsor CT, US
Jeffery L. Stark - Niantic CT, US

Hamilton Sundstrand Corporation - Rockford IL

F16C 32/06

384106, 384103

A hydrodynamic fluid film journal bearing system includes a journal sleeve and one or more hydrodynamic fluid film foils positioned at least partially within the journal sleeve. The journal sleeve defines an inner diameter surface, an outer diameter surface, a wall thickness between the inner and outer diameter surfaces, and opposite first and second ends. The wall thickness of the journal sleeve is reduced at a first region located between the first and second ends, and a chamfered region is formed on the outer diameter surface of the journal sleeve between the first o-ring land and the first end of the journal sleeve.

8147143, Apr 3, 2012

Sep 22, 2004

10/947570

Ronald Struziak - Longmeadow MA, US
Christopher McAuliffe - Windsor CT, US
Brent Merritt - Southwick MA, US
Seth Rosen - Middletown CT, US

Hamilton Sundstrand Corporation - Windsor Locks CT

F16C 32/06

384105, 384103

A thrust bearing for a rotary machine includes first, second and third layers. The second layer includes a corrugated foil arranged between the first and third layers. The corrugated foil includes a wall having peaks engaging the first layer and valleys engaging the third layer. A depression is arranged in the wall between first and second peaks. The depression is spaced from the first and third layers. The first layer includes multiple arcuate top foils that are arranged adjacent to a thrust runner of a rotatable shaft. A corresponding number of arcuate corrugated foils may be used to support the top foils. The third layer, which is provided by an annular main plate, includes multiple arcuate spacers arranged circumferentially on the main plate. The spacers are generally aligned with a trailing edge of the top foils. The depressions decrease the stiffness of the bump foils.

8419283, Apr 16, 2013

Jul 28, 2010

12/845084

Christopher McAuliffe - Windsor CT, US
Ronald M. Struziak - Longmeadow MA, US

Hamilton Sundstrand Corporation - Windsor Locks CT

F16C 32/06

384103, 384106

An example journal air bearing for a rotatable shaft of an air cycle machine includes a top foil configured to receive a rotatable shaft, and an intermediate foil radially outboard the top foil. A journal sleeve is radially outboard the intermediate foil. The top foil and the intermediate foil establish apertures configured to communicate fluid between a first position radially inboard the top foil and a second position radially outboard the intermediate foil.

2008026, Oct 23, 2008

Apr 30, 2007

11/741999

Ronald Struziak - Longmeadow MA, US
Christopher McAuliffe - Windsor CT, US
Brent Merritt - Southwick MA, US
Seth Rosen - Middletown CT, US

F16C 32/06
F16C 33/00

384105, 2989802

A hydrodynamic bearing is provided that includes an annular main foil having axially spaced inner and outer surfaces. Bump foils are supported circumferentially on the outer surface. Top foils are supported circumferentially on the inner surface opposite the bump foils. In one example, spacers are arranged between the top foils and the main foils. The spacers can be provided by chemically etching the main foil, in one example. The bump foils include first and second corrugated portions respectively providing first and second axially heights. The first axial height is less than the second axial height and is arranged at a leading edge of the bump foil relative to the direction of airflow across the hydrodynamic bearing.

2012025, Oct 4, 2012

Apr 4, 2011

13/079312

Ronald M. Struziak - Longmeadow MA, US

F01D 25/16
B23P 17/00
F16C 32/06

4151701, 384106, 29888

A bearing foil assembly includes a top foil, an intermediate foil, and a bump foil. The bump foil is provided with corrugations at circumferentially spaced locations. The bump foil has an end that is bent radially outwardly from a center of the foil assembly. The top foil has a bent portion extending radially outwardly and adjacent to the bent end of the bump foil. A first radius of curvature is defined to a curved portion leading into the bent portion at a first end adjacent to the bent end. A second radius of curvature is defined at an end of the bent portion on an end opposed to the bent end. A ratio of the first radius of curvature to the second radius of curvature is between 0.6 and 10. A bearing assembly, a shaft sub-assembly, an air machine, and a method of assembling a bearing into an air machine are also disclosed.

5540505, Jul 30, 1996

Apr 18, 1998

8/424027

Ronald M. Struziak - Longmeadow MA

United Technologies Corporation - Hartford CT

F16C 3206

384105

The top foil of a hydrodynamic fluid film thrust bearing is formed from a single flat annular disk with radial depressions extending from the outer diameter to the inner diameter of the disk that protrude toward the foil plate and define between adjacent depressions a working surface that is configured to complement the foil bumpers attached to the foil plate. The bump foils of the upper foil plate and the bump foils of the lower foil plates can be either in axial alignment or can be displaced relative to each other. When the two sets of bump foils are displaced, the leading edge of the upper bump foils are disposed upstream (relative to the direction of the air stream entering the bump foils) of the leading edge of the lower bump foils.