Patents by Inventor Sven R. Lofstrom
Sven R. Lofstrom 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: 11932381Abstract: According to an aspect, a method of assembling a mandrel includes assembling a plurality of members via interlocking features arranged at opposing edges of each member of the plurality of members to form a compartment, the assembled members having a collective outer surface that conforms to an inner surface of the spar. A support member is inserted into the compartment formed radially inward from the assembled members, the support member making contact with a portion of each member of the plurality of members.Type: GrantFiled: April 17, 2023Date of Patent: March 19, 2024Assignee: LOCKHEED MARTIN CORPORATIONInventors: Eric Dunn, Keith M. Schenone, Sven R. Lofstrom
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Publication number: 20230249809Abstract: According to an aspect, a method of assembling a mandrel includes assembling a plurality of members via interlocking features arranged at opposing edges of each member of the plurality of members to form a compartment, the assembled members having a collective outer surface that conforms to an inner surface of the spar. A support member is inserted into the compartment formed radially inward from the assembled members, the support member making contact with a portion of each member of the plurality of members.Type: ApplicationFiled: April 17, 2023Publication date: August 10, 2023Applicant: LOCKHEED MARTIN CORPORATIONInventors: Eric Dunn, Keith M. Schenone, Sven R. Lofstrom
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Patent number: 11655052Abstract: A system for regenerating fastener holes in a replacement tip section of a rotor blade includes a first fixture, a second fixture, and a third fixture positionable adjacent a tip section of the rotor blade. The first fixture is used to verify a position of an opening formed in the spar. The second fixture includes a removable bushing having a drillable opening. The drillable opening is aligned with the at least one opening formed in the spar and defines at least one hole to be formed in the replacement tip section. The third fixture includes a countersink opening. The countersink opening is aligned with the at least one hole to be formed in the replacement tip section and the at least one opening formed in the spar to define a countersink feature to be formed in the at least one hole.Type: GrantFiled: June 22, 2021Date of Patent: May 23, 2023Assignee: SIKORSKY AIRCRAFT CORPORATIONInventors: Sven R. Lofstrom, Robert D. Higbie, Frank M. Caputo, Ryan Lehto, Timothy James Conti, Eric Charles Boyle
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Patent number: 11649042Abstract: According to an aspect, a method of assembling a mandrel includes assembling a plurality of members via interlocking features arranged at opposing edges of each member of the plurality of members to form a compartment, the assembled members having a collective outer surface that conforms to an inner surface of the spar. A support member is inserted into the compartment formed radially inward from the assembled members, the support member making contact with a portion of each member of the plurality of members.Type: GrantFiled: July 14, 2020Date of Patent: May 16, 2023Assignee: LOCKHEED MARTIN CORPORATIONInventors: Eric Dunn, Keith M. Schenone, Sven R. Lofstrom
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Patent number: 11548103Abstract: A pressure tool for rotor blade repair including a mobile support system including a support surface, a first bladder support assembly including a first inflatable bladder fixedly mounted to the support surface, a second bladder support assembly including a second inflatable bladder pivotally mounted relative to the support surface, and an activation mechanism operatively coupled to the second bladder support assembly. The activation mechanism is operable to selectively shift the second bladder support assembly relative to the first bladder support assembly. A fluid delivery system is operable to direct a fluid into each of the first inflatable bladder and the second inflatable bladder.Type: GrantFiled: October 20, 2020Date of Patent: January 10, 2023Assignee: SIKORSKY AIRCRAFT CORPORATIONInventors: Ryan Lehto, David W. Littlejohn, Sven R. Lofstrom
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Publication number: 20220194571Abstract: A method of mounting a replacement tip section to an exposed end of a rotor blade includes removing an existing tip section from the rotor blade to create the exposed end of the rotor blade, installing the rotor blade having the exposed end onto a holding fixture, assembling the replacement tip section about the exposed end of the rotor blade, positioning a bonding fixture about the replacement tip section, and curing the replacement tip section to the exposed end of the rotor blade.Type: ApplicationFiled: December 30, 2021Publication date: June 23, 2022Applicant: Sikorsky Aircraft CorporationInventors: Joseph Pantalone, III, Timothy James Conti, Frank M. Caputo, Sven R. Lofstrom, Keith M. Schenone, Robert D. Higbie, Eric Charles Boyle, Alicia Fernandez
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Patent number: 11242140Abstract: A method of mounting a replacement tip section to an exposed end of a rotor blade includes removing an existing tip section from the rotor blade to create the exposed end of the rotor blade, installing the rotor blade having the exposed end onto a holding fixture, assembling the replacement tip section about the exposed end of the rotor blade, positioning a bonding fixture about the replacement tip section, and curing the replacement tip section to the exposed end of the rotor blade.Type: GrantFiled: August 10, 2018Date of Patent: February 8, 2022Assignee: SIKORSKY AIRCRAFT CORPORATIONInventors: Joseph Pantalone, III, Timothy James Conti, Frank M. Caputo, Sven R. Lofstrom, Keith M. Schenone, Robert D. Higbie, Eric Charles Boyle, Alicia Fernandez
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Publication number: 20220017215Abstract: According to an aspect, a method of assembling a mandrel includes assembling a plurality of members via interlocking features arranged at opposing edges of each member of the plurality of members to form a compartment, the assembled members having a collective outer surface that conforms to an inner surface of the spar. A support member is inserted into the compartment formed radially inward from the assembled members, the support member making contact with a portion of each member of the plurality of members.Type: ApplicationFiled: July 14, 2020Publication date: January 20, 2022Inventors: Eric Dunn, Keith M. Schenone, Sven R. Lofstrom
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Publication number: 20210309390Abstract: A system for regenerating fastener holes in a replacement tip section of a rotor blade includes a first fixture, a second fixture, and a third fixture positionable adjacent a tip section of the rotor blade. The first fixture is used to verify a position of an opening formed in the spar. The second fixture includes a removable bushing having a drillable opening. The drillable opening is aligned with the at least one opening formed in the spar and defines at least one hole to be formed in the replacement tip section. The third fixture includes a countersink opening. The countersink opening is aligned with the at least one hole to be formed in the replacement tip section and the at least one opening formed in the spar to define a countersink feature to be formed in the at least one hole.Type: ApplicationFiled: June 22, 2021Publication date: October 7, 2021Applicant: Sikorsky Aircraft CorporationInventors: Sven R. Lofstrom, Robert D. Higbie, Frank M. Caputo, Ryan Lehto, Timothy James Conti, Eric Charles Boyle
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Patent number: 11091254Abstract: A rotor blade disassembly method includes applying spanwise support to a rotor blade body and heating a bond disposed on an end of the rotor blade body. The method also includes removing the spanwise support from the rotor blade body and exerting shear stress on the bond using weight of the rotor blade body. A blade disassembly system is also described.Type: GrantFiled: December 21, 2018Date of Patent: August 17, 2021Assignee: SIKORSKY AIRCRAFT CORPORATIONInventors: Ryan Lehto, Eric C. Boyle, Sven R. Lofstrom, David Littlejohn
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Patent number: 11066188Abstract: A system for regenerating fastener holes in a replacement tip section of a rotor blade includes a first fixture, a second fixture, and a third fixture positionable adjacent a tip section of the rotor blade. The first fixture is used to verify a position of an opening formed in the spar. The second fixture includes a removable bushing having a drillable opening. The drillable opening is aligned with the at least one opening formed in the spar and defines at least one hole to be formed in the replacement tip section. The third fixture includes a countersink opening. The countersink opening is aligned with the at least one hole to be formed in the replacement tip section and the at least one opening formed in the spar to define a countersink feature to be formed in the at least one hole.Type: GrantFiled: August 10, 2018Date of Patent: July 20, 2021Assignee: SIKORSKY AIRCRAFT CORPORATIONInventors: Sven R. Lofstrom, Robert D. Higbie, Frank M. Caputo, Ryan Lehto, Timothy James Conti, Eric Charles Boyle
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Publication number: 20210046591Abstract: A pressure tool for rotor blade repair including a mobile support system including a support surface, a first bladder support assembly including a first inflatable bladder fixedly mounted to the support surface, a second bladder support assembly including a second inflatable bladder pivotally mounted relative to the support surface, and an activation mechanism operatively coupled to the second bladder support assembly. The activation mechanism is operable to selectively shift the second bladder support assembly relative to the first bladder support assembly. A fluid delivery system is operable to direct a fluid into each of the first inflatable bladder and the second inflatable bladder.Type: ApplicationFiled: October 20, 2020Publication date: February 18, 2021Applicant: Sikorsky Aircraft CorporationInventors: Ryan Lehto, David W. Littlejohn, Sven R. Lofstrom
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Patent number: 10836001Abstract: A pressure tool for rotor blade repair including a mobile support system including a support surface, a first bladder support assembly including a first inflatable bladder fixedly mounted to the support surface, a second bladder support assembly including a second inflatable bladder pivotally mounted relative to the support surface, and an activation mechanism operatively coupled to the second bladder support assembly. The activation mechanism is operable to selectively shift the second bladder support assembly relative to the first bladder support assembly. A fluid delivery system is operable to direct a fluid into each of the first inflatable bladder and the second inflatable bladder.Type: GrantFiled: July 7, 2017Date of Patent: November 17, 2020Assignee: SIKORSKY AIRCRAFT CORPORATIONInventors: Ryan Lehto, David W. Littlejohn, Sven R. Lofstrom
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Patent number: 10730201Abstract: A tool for machining chamfers includes a tool body defining a first reference and a second reference configured for proper positioning of the tool body on a workpiece. A router port is defined through the tool body to provide access to the workpiece for a router. A router attachment proximate the router port is configured to position a router mounted to the router attachment for machining a chamfer in the workpiece with reference to the first and second references.Type: GrantFiled: October 3, 2016Date of Patent: August 4, 2020Assignee: SIKORSKY AIRCRAFT CORPORATIONInventors: Sven R. Lofstrom, Ryan Lehto, Joshua Richards
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Publication number: 20200047919Abstract: A system for regenerating fastener holes in a replacement tip section of a rotor blade includes a first fixture, a second fixture, and a third fixture positionable adjacent a tip section of the rotor blade. The first fixture is used to verify a position of an opening formed in the spar. The second fixture includes a removable bushing having a drillable opening. The drillable opening is aligned with the at least one opening formed in the spar and defines at least one hole to be formed in the replacement tip section. The third fixture includes a countersink opening. The countersink opening is aligned with the at least one hole to be formed in the replacement tip section and the at least one opening formed in the spar to define a countersink feature to be formed in the at least one hole.Type: ApplicationFiled: August 10, 2018Publication date: February 13, 2020Inventors: Sven R. Lofstrom, Robert D. Higbie, Frank M. Caputo, Ryan Lehto, Timothy James Conti, Eric Charles Boyle
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Publication number: 20200047878Abstract: A method of mounting a replacement tip section to an exposed end of a rotor blade includes removing an existing tip section from the rotor blade to create the exposed end of the rotor blade, installing the rotor blade having the exposed end onto a holding fixture, assembling the replacement tip section about the exposed end of the rotor blade, positioning a bonding fixture about the replacement tip section, and curing the replacement tip section to the exposed end of the rotor blade.Type: ApplicationFiled: August 10, 2018Publication date: February 13, 2020Inventors: Joseph Pantalone, III, Timothy James Conti, Frank M. Caputo, Sven R. Lofstrom, Keith M. Schenone, Robert D. Higbie, Eric Charles Boyle, Alicia Fernandez
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Patent number: 10518395Abstract: A cuff-blade attachment bushing removal tool system includes an alignment plate comprising alignment holes defined through the alignment plate in a pattern of a plurality of bushing holes of a blade root, a bladder plate connected to the alignment plate, and a bladder positioned on the bladder plate such that a gap is formed between the bladder and the alignment plate to receive a blade root to align the alignment holes and the bushing holes of the blade root, wherein the bladder is transitionable between an uninflated position where the blade root can be inserted into the gap and an inflated position where the blade root is clamped between the bladder and the alignment plate.Type: GrantFiled: January 14, 2019Date of Patent: December 31, 2019Assignee: SIKORSKY AIRCRAFT CORPORATIONInventors: Scott O. Smith, Sven R. Lofstrom, Philip Petering
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Patent number: 10457422Abstract: A method and apparatus for securing a rotor blade is disclosed. The apparatus includes a base and an offset member configured to maintain the base at a selected distance from a set point. A clamping member is supported by the base and is receptive of the rotor blade at a selected location of the rotor blade, wherein the rotor blade is positioned against the set point. A slidable component supports the clamping member and slides the clamping member within the base to the selected location of the rotor blade. The free end of the clam shell assembly can be secured to a support beam that raises the clam shell assembly and rotor blade from the base for immersion testing.Type: GrantFiled: December 7, 2016Date of Patent: October 29, 2019Assignee: SIKORSKY AIRCRAFT CORPORATIONInventors: David W. Littlejohn, Sven R. Lofstrom, Scott O. Smith
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Publication number: 20190143497Abstract: A cuff-blade attachment bushing removal tool system includes an alignment plate comprising alignment holes defined through the alignment plate in a pattern of a plurality of bushing holes of a blade root, a bladder plate connected to the alignment plate, and a bladder positioned on the bladder plate such that a gap is formed between the bladder and the alignment plate to receive a blade root to align the alignment holes and the bushing holes of the blade root, wherein the bladder is transitionable between an uninflated position where the blade root can be inserted into the gap and an inflated position where the blade root is clamped between the bladder and the alignment plate.Type: ApplicationFiled: January 14, 2019Publication date: May 16, 2019Inventors: Scott O. Smith, Sven R. Lofstrom, Philip Petering
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Publication number: 20190135421Abstract: A rotor blade disassembly method includes applying spanwise support to a rotor blade body and heating a bond disposed on an end of the rotor blade body. The method also includes removing the spanwise support from the rotor blade body and exerting shear stress on the bond using weight of the rotor blade body. A blade disassembly system is also described.Type: ApplicationFiled: December 21, 2018Publication date: May 9, 2019Inventors: Ryan Lehto, Eric C. Boyle, Sven R. Lofstrom, David Littlejohn