Patents by Inventor Ronald M. Struziak
Ronald M. Struziak has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10371198Abstract: A quad foil journal air bearing includes a journal sleeve having an inner circumference that defines an inner surface. A first foil assembly includes a first key coupled to the inner surface of the journal sleeve. The quad foil journal air bearing further includes a second foil assembly having a second key coupled to the inner surface of the journal sleeve.Type: GrantFiled: April 25, 2018Date of Patent: August 6, 2019Assignee: HAMILTON SUNDSTRAND CORPORATIONInventors: Christopher McAuliffe, Ronald M. Struziak
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Publication number: 20180298941Abstract: A quad foil journal air bearing includes a journal sleeve having an inner circumference that defines an inner surface. A first foil assembly includes a first key coupled to the inner surface of the journal sleeve. The quad foil journal air bearing further includes a second foil assembly having a second key coupled to the inner surface of the journal sleeve.Type: ApplicationFiled: April 25, 2018Publication date: October 18, 2018Inventors: Christopher McAuliffe, Ronald M. Struziak
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Patent number: 9732789Abstract: A journal air bearing is provided. The bearing includes a top foil configured to receive the shaft, an intermediate foil disposed radially outboard the top foil, and a journal sleeve disposed radially outboard the intermediate foil. The intermediate foil defines a plurality of holes configured to act as a vent to communicate fluid to an increased supply area to an air film.Type: GrantFiled: September 26, 2014Date of Patent: August 15, 2017Assignee: HAMILTON SUNDSTRAND CORPORATIONInventors: Christopher McAuliffe, Ronald M. Struziak, Darryl A. Colson
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Patent number: 9470260Abstract: A hydrodynamic thrust bearing has an annular plate, a plurality of bearing foils, and a plurality of bumper foils. The annular plate has a first face and a second face opposite the first face. The bearing foils have an arcuate shape and are joined to the first face of the annular plate. The bumper foils have an arcuate and corrugated shape and are joined to the second face of the annular plate. A method of making a hydrodynamic thrust bearing includes joining the bearing and bumper foils to the annular plate with integrally-formed spacers in which each bumper foil corresponds to a bearing foil.Type: GrantFiled: September 26, 2014Date of Patent: October 18, 2016Assignee: Hamilton Sundstrand CorporationInventors: Ronald M. Struziak, Murtuza Lokhandwalla, Christopher McAuliffe
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Publication number: 20160208847Abstract: A quad foil journal air bearing includes a journal sleeve having an inner circumference that defines an inner surface. A first foil assembly includes a first key coupled to the inner surface of the journal sleeve. The quad foil journal air bearing further includes a second foil assembly having a second key coupled to the inner surface of the journal sleeve.Type: ApplicationFiled: January 19, 2015Publication date: July 21, 2016Inventors: Christopher McAuliffe, Ronald M. Struziak
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Publication number: 20160091015Abstract: A journal air bearing is provided. The bearing includes a top foil configured to receive the shaft, an intermediate foil disposed radially outboard the top foil, and a journal sleeve disposed radially outboard the intermediate foil. The intermediate foil defines a plurality of holes configured to act as a vent to communicate fluid to an increased supply area to an air film.Type: ApplicationFiled: September 26, 2014Publication date: March 31, 2016Inventors: Christopher McAuliffe, Ronald M. Struziak, Darryl A. Colson
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Publication number: 20160091016Abstract: A hydrodynamic thrust bearing has an annular plate, a plurality of bearing foils, and a plurality of bumper foils. The annular plate has a first face and a second face opposite the first face. The bearing foils have an arcuate shape and are joined to the first face of the annular plate. The bumper foils have an arcuate and corrugated shape and are joined to the second face of the annular plate. A method of making a hydrodynamic thrust bearing includes joining the bearing and bumper foils to the annular plate with integrally-formed spacers in which each bumper foil corresponds to a bearing foil.Type: ApplicationFiled: September 26, 2014Publication date: March 31, 2016Applicant: HAMILTON SUNDSTRAND CORPORATIONInventors: Ronald M. Struziak, Murtuza Lokhandwalla, Christopher McAuliffe
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Patent number: 9028149Abstract: Disclosed is a bearing sleeve for supporting a shaft of an air cycle machine. The bearing sleeve includes an outer diameter and an inner diameter. The outer diameter is within a range of 3.222 and 3.224 inches. Further included is a foil retaining cavity provided in the inner diameter of the sleeve. The foil retaining cavity includes a slot and first and second openings located at opposing axial ends of the slot. Each of the first and second openings include a small portion and a large portion having different axial lengths. A ratio of the combined axial lengths of the large portions to an axial length of the foil retaining cavity is within a range of 0.19:1 and 0.22:1.Type: GrantFiled: April 30, 2013Date of Patent: May 12, 2015Assignee: Hamilton Sundstrand CorporationInventors: Seth E. Rosen, Ronald M. Struziak
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Patent number: 8926182Abstract: Disclosed is a bearing sleeve for supporting a shaft of an air cycle machine. The bearing sleeve includes an outer diameter and an inner diameter. The outer diameter is within a range of 3.222 and 3.224 inches. Further included is a foil retaining cavity provided in the inner diameter of the sleeve. The foil retaining cavity includes a slot and first and second openings located at opposing axial ends of the slot. Each of the first and second openings include a small portion and a large portion having different axial lengths. A ratio of the combined axial lengths of the large portions to an axial length of the foil retaining cavity is within a range of 0.19:1 and 0.22:1. Further included is a seal attachment portion provided at one axial end of the bearing sleeve configured to circumferentially support a seal.Type: GrantFiled: April 30, 2013Date of Patent: January 6, 2015Assignee: Hamilton Sundstrand CorporationInventors: Seth E. Rosen, Ronald M. Struziak
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Patent number: 8920032Abstract: Disclosed is a bearing sleeve for supporting a shaft of an air cycle machine. The bearing sleeve includes an outer diameter and an inner diameter. The outer diameter is within a range of 3.214 and 3.216 inches. Further included is a foil retaining cavity provided in the inner diameter of the sleeve. The foil retaining cavity includes a slot and first and second openings located at opposing axial ends of the slot. Each of the first and second openings include a small portion and a large portion having different axial lengths. A ratio of the combined axial lengths of the large portions to an axial length of the foil retaining cavity is within a range of 0.19:1 and 0.22:1. Further included is a seal attachment portion provided at one axial end of the bearing sleeve configured to circumferentially support a seal.Type: GrantFiled: April 30, 2013Date of Patent: December 30, 2014Assignee: Hamilton Sundstrand CorporationInventors: Seth E. Rosen, Ronald M. Struziak
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Publication number: 20140270605Abstract: Disclosed is a bearing sleeve for supporting a shaft of an air cycle machine. The bearing sleeve includes an outer diameter and an inner diameter. The outer diameter is within a range of 3.222 and 3.224 inches. Further included is a foil retaining cavity provided in the inner diameter of the sleeve. The foil retaining cavity includes a slot and first and second openings located at opposing axial ends of the slot. Each of the first and second openings include a small portion and a large portion having different axial lengths. A ratio of the combined axial lengths of the large portions to an axial length of the foil retaining cavity is within a range of 0.19:1 and 0.22:1.Type: ApplicationFiled: April 30, 2013Publication date: September 18, 2014Applicant: Hamilton Sundstrand CorporationInventors: Seth E. Rosen, Ronald M. Struziak
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Publication number: 20140270604Abstract: Disclosed is a bearing sleeve for supporting a shaft of an air cycle machine. The bearing sleeve includes an outer diameter and an inner diameter. The outer diameter is within a range of 3.222 and 3.224 inches. Further included is a foil retaining cavity provided in the inner diameter of the sleeve. The foil retaining cavity includes a slot and first and second openings located at opposing axial ends of the slot. Each of the first and second openings include a small portion and a large portion having different axial lengths. A ratio of the combined axial lengths of the large portions to an axial length of the foil retaining cavity is within a range of 0.19:1 and 0.22:1. Further included is a seal attachment portion provided at one axial end of the bearing sleeve configured to circumferentially support a seal.Type: ApplicationFiled: April 30, 2013Publication date: September 18, 2014Applicant: Hamilton Sundstrand CorporationInventors: Seth E. Rosen, Ronald M. Struziak
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Publication number: 20140270603Abstract: Disclosed is a bearing sleeve for supporting a shaft of an air cycle machine. The bearing sleeve includes an outer diameter and an inner diameter. The outer diameter is within a range of 3.214 and 3.216 inches. Further included is a foil retaining cavity provided in the inner diameter of the sleeve. The foil retaining cavity includes a slot and first and second openings located at opposing axial ends of the slot. Each of the first and second openings include a small portion and a large portion having different axial lengths. A ratio of the combined axial lengths of the large portions to an axial length of the foil retaining cavity is within a range of 0.19:1 and 0.22:1. Further included is a seal attachment portion provided at one axial end of the bearing sleeve configured to circumferentially support a seal.Type: ApplicationFiled: April 30, 2013Publication date: September 18, 2014Applicant: Hamilton Sundstrand CorporationInventors: Seth E. Rosen, Ronald M. Struziak
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Patent number: 8807921Abstract: 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.Type: GrantFiled: April 4, 2011Date of Patent: August 19, 2014Assignee: Hamilton Sundstrand CorporationInventor: Ronald M. Struziak
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Patent number: 8794838Abstract: Disclosed is a bearing sleeve for supporting a shaft of an air cycle machine. The bearing sleeve includes an outer diameter and an inner diameter. The outer diameter is within a range of 3.214 and 3.216 inches. Further included is a foil retaining cavity provided in the inner diameter of the sleeve. The foil retaining cavity includes a slot and first and second openings located at opposing axial ends of the slot. Each of the first and second openings include a small portion and a large portion having different axial lengths. A ratio of the combined axial lengths of the large portions to an axial length of the foil retaining cavity is within a range of 0.19:1 and 0.22:1.Type: GrantFiled: April 30, 2013Date of Patent: August 5, 2014Assignee: Hamilton Sundstrand CorporationInventors: Seth E. Rosen, Ronald M. Struziak
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Patent number: 8419283Abstract: 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.Type: GrantFiled: July 28, 2010Date of Patent: April 16, 2013Assignee: Hamilton Sundstrand CorporationInventors: Christopher McAuliffe, Ronald M. Struziak
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Publication number: 20120251300Abstract: 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.Type: ApplicationFiled: April 4, 2011Publication date: October 4, 2012Inventor: Ronald M. Struziak
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Publication number: 20120027327Abstract: 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.Type: ApplicationFiled: July 28, 2010Publication date: February 2, 2012Inventors: Christopher McAuliffe, Ronald M. Struziak
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Patent number: 7648280Abstract: 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.Type: GrantFiled: April 12, 2007Date of Patent: January 19, 2010Assignee: Hamilton Sundstrand CorporationInventors: Ronald M. Struziak, Christopher McAuliffe, Jeffery L. Stark
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Patent number: 7648279Abstract: 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.Type: GrantFiled: April 12, 2007Date of Patent: January 19, 2010Assignee: Hamilton Sundstrand CorporationInventors: Ronald M. Struziak, Christopher McAuliffe, Jeffery L. Stark