Patents by Inventor David Littlejohn
David Littlejohn 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: 11834200Abstract: A method of bonding a blade cuff to a rotor blade includes installing the blade cuff to a root end of the rotor blade. The method includes mounting the rotor blade within a plurality of supports. The method includes coupling the blade cuff to a first fixture. The method includes installing a second fixture about the blade cuff. The method further includes applying localized and constant heat and pressure to the blade cuff via the second fixture.Type: GrantFiled: May 15, 2020Date of Patent: December 5, 2023Assignee: SIKORSKY AIRCRAFT CORPORATIONInventors: Scott Oren Smith, David Littlejohn, Sven Roy Lofstrom
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Patent number: 11584547Abstract: A bond fixture includes a support structure and a first assembly coupled to the support structure. The first assembly includes a frame defining a chamber and a first pressure pad and second pressure pad coupled to the frame opposite one another and positioned within the chamber. The second pressure pad is movable to control a pressure applied by the first pressure pad and the second pressure pad.Type: GrantFiled: April 8, 2021Date of Patent: February 21, 2023Assignee: SIKORSKY AIRCRAFT CORPORATIONInventors: David Littlejohn, Sven Roy Lofstrom, Scott Oren Smith
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Patent number: 11572206Abstract: A system for packaging includes a continuous flow wrap machine, a product reader, and a labeling unit. The product reader is configured to sense each product of the series of products transported on the infeed conveyor of the continuous flow wrap machine and to provide detected information for facilitating access to unique product information associated with each sensed product of the series of products. The labeling unit is adapted to apply visual representation of the unique product information to the tube formed in the continuous flow wrap machine while the tube is moving or to the resulting packaged product while the packaged product is moving.Type: GrantFiled: May 4, 2016Date of Patent: February 7, 2023Assignee: Sealed Air Corporation (US)Inventors: Russell T. Christman, David Littlejohn, Gary Wood, James Michaelian, Thomas P. Orsini, Michael A. Kalinowski, John Gilbert
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Patent number: 11421724Abstract: The fastener includes a bolt, a nut, a sleeve, and a drive nut. The drive nut interfaces with the nut. The bolt is disposed through the nut, sleeve, and drive nut. The bolt comprises one or more threaded portions and a non-threaded portion. The fastener breaks-off at the non-threaded portion during installation. The installed fastener comprises a recess-free, flush surface with a workpiece.Type: GrantFiled: August 12, 2019Date of Patent: August 23, 2022Assignee: MONOGRAM AEROSPACE FASTENERS, INC.Inventors: Jerry Quaresma, David Littlejohn
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Patent number: 11331713Abstract: A bond fixture includes a frame that defines a chamber for receiving a component. At least one bladder assembly is mounted to the frame and extends into the chamber to apply a pressure to an adjacent surface of the component. A caul assembly is positionable about the component and receivable within the chamber. The caul assembly heats a localized portion of the component.Type: GrantFiled: September 11, 2019Date of Patent: May 17, 2022Assignee: SIKORSKY AIRCRAFT CORPORATIONInventors: Sven Roy Lofstrom, David Littlejohn, Scott Oren Smith
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Patent number: 11299293Abstract: A bond fixture includes a frame defining a chamber for receiving a component. At least one bladder assembly is connected to the frame. The at least one bladder assembly includes a pad for contacting the component. A position of the pad relative to the component is controlled by a pressure of the bladder assembly. A caul assembly is adapted to thermally couple to the component to heat a localized portion of the component.Type: GrantFiled: August 20, 2019Date of Patent: April 12, 2022Assignee: SIKORSKY AIRCRAFT CORPORATIONInventors: David Littlejohn, Sven Roy Lofstrom
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Patent number: 11220331Abstract: A bond fixture for bonding a component includes a frame defining a chamber for receiving the component. A first pad and a second pad are mounted to the frame. At least one of the first pad and the second pad is movable relative to the frame to adjust a pressure applied to the component. A caul assembly is adapted to be disposed in thermal communication with the component. The caul assembly heats a localized portion of the component.Type: GrantFiled: April 17, 2019Date of Patent: January 11, 2022Assignee: SIKORSKY AIRCRAFT CORPORATIONInventors: Sven Roy Lofstrom, David Littlejohn, Eric Boyle
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Patent number: 11161627Abstract: A bond fixture includes a first fixture having a heater and a plurality of clamps. Each of the plurality of clamps includes a first member and a second member rotatable between a first position and a second position. A second fixture includes a root end lift translatable vertically between a retracted position and an extended position and a root end clamp translatable along a horizontal axis. The root end clamp is configured to cooperate with the root end.Type: GrantFiled: April 3, 2019Date of Patent: November 2, 2021Assignee: SIKORSKY AIRCRAFT CORPORATIONInventors: Sven Roy Lofstrom, David Littlejohn, Eric Boyle, Scott Oren Smith
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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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Publication number: 20210221537Abstract: A bond fixture includes a support structure and a first assembly coupled to the support structure. The first assembly includes a frame defining a chamber and a first pressure pad and second pressure pad coupled to the frame opposite one another and positioned within the chamber. The second pressure pad is movable to control a pressure applied by the first pressure pad and the second pressure pad.Type: ApplicationFiled: April 8, 2021Publication date: July 22, 2021Applicant: Sikorsky Aircraft CorporationInventors: David Littlejohn, Sven Roy Lofstrom, Scott Oren Smith
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Patent number: 11046460Abstract: A holding fixture includes a first blade support assembly and a second blade support assembly. The second blade support assembly is spaced at a distance from the first blade support assembly and includes a base plate removably mounted to a milling machine, an adjustable conic support connectable to the base plate via a spacer block, and a blade adjustment assembly movable to control a pressure applied by the blade adjustment assembly.Type: GrantFiled: August 13, 2019Date of Patent: June 29, 2021Assignee: SIKORSKY AIRCRAFT CORPORATIONInventors: Sven Roy Lofstrom, David Littlejohn
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Patent number: 10981673Abstract: A bond fixture includes a support structure and a first assembly coupled to the support structure. The first assembly includes a frame defining a chamber and a first pressure pad and second pressure pad coupled to the frame opposite one another and positioned within the chamber. The second pressure pad is movable to control a pressure applied by the first pressure pad and the second pressure pad.Type: GrantFiled: September 30, 2016Date of Patent: April 20, 2021Assignee: SIKORSKY AIRCRAFT CORPORATIONInventors: David Littlejohn, Sven Roy Lofstrom, Scott Oren Smith
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Publication number: 20210094682Abstract: A bond fixture includes a first frame defining a chamber configured to receive a leading edge of a rotor blade and a second frame pivotally coupled to the first frame. The second frame is movable between a first position and a second position. In the second position, the second frame restricts movement of the bond fixture relative to the rotor blade. At least one supporting assembly extends from the first frame towards the chamber. The at least one supporting assembly is adjustable to apply a pressure to an adjacent surface of the rotor blade.Type: ApplicationFiled: December 15, 2020Publication date: April 1, 2021Applicant: Sikorsky Aircraft CorporationInventors: David Littlejohn, Sven Roy Lofstrom, Scott Oren Smith
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Patent number: 10875638Abstract: A bond fixture includes a first frame defining a chamber configured to receive a leading edge of a rotor blade and a second frame pivotally coupled to the first frame. The second frame is movable between a first position and a second position. In the second position, the second frame restricts movement of the bond fixture relative to the rotor blade. At least one supporting assembly extends from the first frame towards the chamber. The at least one supporting assembly is adjustable to apply a pressure to an adjacent surface of the rotor blade.Type: GrantFiled: September 30, 2016Date of Patent: December 29, 2020Assignee: SIKORSKY AIRCRAFT CORPORATIONInventors: David Littlejohn, Sven Roy Lofstrom, Scott Oren Smith
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Publication number: 20200277085Abstract: A bond fixture including a plurality of supports mounted about a surface. At least one of the plurality of supports includes a vertical member and a hand crank operable to adjust a position of the vertical member. A first fixture is disposed at an end of the bond fixture and is movable relative to the surface. The first fixture includes a base and a support extending from the base. A second fixture includes a first member and a second member movably coupled. A fastener extending between the first member and the second member controls relative movement of the first member and the second member to define an opening there between. Each of the first member and the second member includes a plate having a heater formed therein.Type: ApplicationFiled: May 15, 2020Publication date: September 3, 2020Inventors: Scott Oren Smith, David Littlejohn, Sven Roy Lofstrom
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Patent number: 10703509Abstract: A bond fixture including a plurality of supports mounted about a surface. At least one of the plurality of supports includes a vertical member and a hand crank operable to adjust a position of the vertical member. A first fixture is disposed at an end of the bond fixture and is movable relative to the surface. The first fixture includes a base and a support extending from the base. A second fixture includes a first member and a second member movably coupled. A fastener extending between the first member and the second member controls relative movement of the first member and the second member to define an opening there between. Each of the first member and the second member includes a plate having a heater formed therein.Type: GrantFiled: August 9, 2016Date of Patent: July 7, 2020Assignee: SIKORSKY AIRCRAFT CORPORATIONInventors: Scott Oren Smith, David Littlejohn, Sven Roy Lofstrom
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Patent number: 10647410Abstract: A spinner assembly includes a cone-shaped member having a plurality of blade openings. The cone-shaped member is receivable about a shaft at a first location. A bulkhead frame is connected to the cone-shaped member. At least one strut is configured to couple the bulkhead frame to the shaft at a second location. The at least one strut includes at least one arm having a longitudinal rigid member and at least one flexure region that defines an axis about which the at least one arm bends.Type: GrantFiled: August 1, 2016Date of Patent: May 12, 2020Assignee: SIKORSKY AIRCRAFT CORPORATIONInventors: Robert Higbie, David Littlejohn
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Patent number: 10569906Abstract: A method of making a rotor blade assembly includes receiving a sheath assembly and a blade body at a blade assembly tool. The sheath assembly is spread by applying force to an interior surface of the sheath assembly. The blade body is inserted within the interior of the sheath assembly, registered with the sheath assembly, and the force removed from the interior surface of the sheath assembly such that the sheath assembly collapses on the blade body.Type: GrantFiled: June 30, 2016Date of Patent: February 25, 2020Assignee: SIKORSKY AIRCRAFT CORPORATIONInventors: David Littlejohn, Sven Roy Lofstrom, Eric C. Boyle
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Patent number: D914710Type: GrantFiled: October 31, 2019Date of Patent: March 30, 2021Assignee: Eli Lilly and CompanyInventors: Christopher Todd Collins, Rebecca Morgan Eley, Kathryn Ann Kollett, Joshua David Littlejohn
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Patent number: D940731Type: GrantFiled: February 2, 2021Date of Patent: January 11, 2022Assignee: Eli Lilly and CompanyInventors: Christopher Todd Collins, Rebecca Morgan Eley, Kathryn Ann Kollett, Joshua David Littlejohn