Patents by Inventor Aaron J. Rositch
Aaron J. Rositch 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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Publication number: 20170282670Abstract: A gas spring for a vehicle suspension system includes a cylinder, a rod disposed within the cylinder, the rod and the cylinder at least partially defining a chamber, and an accumulator in communication with the chamber. The rod and the cylinder are configured such that a relative movement therebetween changes the volume of the chamber. Gas in the chamber and the accumulator are configured to cooperate to at least partially provide a spring rate that varies based on at least one of a deflection and a spring force associated with at least one of the rod and the cylinder.Type: ApplicationFiled: June 23, 2017Publication date: October 5, 2017Applicant: Oshkosh Defense, LLCInventors: Roy Venton-Walters, Aaron J. Rositch, Jesse L. Knoble, Erik S. Ellifson, Mark L. Steckling
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Patent number: 9688112Abstract: A gas spring for a vehicle suspension system includes a cylinder, a rod disposed within the cylinder, the rod and the cylinder defining a chamber, and an accumulator in communication with the chamber. The rod and the cylinder are configured such that a relative movement therebetween changes the volume of the chamber. Gas in the chamber and the accumulator are configured to cooperate to at least partially provide a spring rate that varies based on at least one of a deflection and a spring force associated with at least one of the rod and the cylinder.Type: GrantFiled: March 27, 2015Date of Patent: June 27, 2017Assignee: Oshkosh Defense, LLCInventors: Roy Venton-Walters, Aaron J. Rositch, Jesse L. Knoble, Erik S. Ellifson, Mark L. Steckling
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Patent number: 9581153Abstract: A pump includes a housing defining an interior volume, a diaphragm partitioning the interior volume into a pumping chamber and an actuating chamber, a diaphragm support associated with the actuating chamber and configured to limit movement of the diaphragm, and a dispersion element coupled to the housing. The dispersion element includes a network of channels that is configured to distribute a fluid within the pump.Type: GrantFiled: July 25, 2014Date of Patent: February 28, 2017Assignee: Oshkosh CorporationInventors: Roy Venton-Walters, Aaron J. Rositch, Erik Ellifson, Jason J. Zuleger, Joseph Krebs
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Publication number: 20160208883Abstract: The damper assembly includes a tubular member, a rod, a primary piston, a secondary piston, and a resilient member. The tubular member includes a sidewall and a cap positioned at an end of the sidewall. The sidewall and the cap define an inner volume. The rod extends within the inner volume. The primary piston is positioned within the inner volume and coupled to the rod. The primary piston defines a first contact surface. The secondary piston includes a body member having a second contact surface, an opposing second surface, and an inner cylindrical face defining a central aperture that receives the rod. The secondary piston defines a channel extending from the inner cylindrical face to an outer periphery of the body member. The first contact surface and the channel are configured to cooperatively define a flow conduit upon engagement between the primary piston and the secondary piston.Type: ApplicationFiled: March 29, 2016Publication date: July 21, 2016Applicant: Oshkosh Defense, LLCInventors: Patrick S. Dillman, Erik S. Ellifson, Aaron J. Rositch
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Publication number: 20160167475Abstract: A damper assembly for a vehicle suspension system includes a primary damper and a secondary damper. The secondary damper includes a housing having a wall that at least partially surrounds at least a portion of the primary damper, the volume between the wall and the primary damper defining a chamber, and the wall defines an aperture. The secondary damper also includes a piston positioned within the chamber, a conduit defining a flow path that includes the aperture, and a valve disposed along the flow path. The primary damper is configured to provide a base damping force and the secondary damper is configured to provide a supplemental damping force that varies based on the position of the piston within the chamber.Type: ApplicationFiled: February 19, 2016Publication date: June 16, 2016Applicant: Oshkosh Defense, LLCInventors: Erik S. Ellifson, Patrick S. Dillman, Jason J. Zuleger, Aaron J. Rositch, Robert K. Sollenskog
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Patent number: 9303715Abstract: A damper assembly is disclosed that includes a tubular member, a rod, a primary piston, a secondary piston, and a seal. The tubular member includes a sidewall and a cap positioned at an end of the sidewall. The sidewall and the cap defining an inner volume. The rod extends within the inner volume of the tubular member. The primary piston defines a contact surface and is positioned within the inner volume and coupled to an end of the rod. The secondary piston defines a central aperture and a channel. Engagement of the primary piston and the secondary piston forms a flow conduit between the channel and the contact surface. The seal is disposed between an outer surface of the secondary piston and the sidewall such that a flow path is formed through the central aperture and the flow conduit.Type: GrantFiled: March 10, 2013Date of Patent: April 5, 2016Assignee: Oshkosh Defense, LLCInventors: Patrick S. Dillman, Erik S. Ellifson, Aaron J. Rositch
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Patent number: 9291230Abstract: A damper assembly for a vehicle suspension system includes a primary damper and a secondary damper coupled to the primary damper. The secondary damper includes a housing, a piston, a conduit, and a valve. The housing includes a sidewall that defines a set of apertures and at least partially surrounds the primary damper, and the volume between the sidewall and the primary damper defines a damping chamber. The piston is positioned within the damping chamber and is slidably coupled to the sidewall. The conduit forms a flow path between the set of apertures, and the valve is disposed along the flow path. The primary damper provides a base damping force, and the secondary damper provides a supplemental damping force that varies based on the position of the piston along the housing.Type: GrantFiled: July 17, 2014Date of Patent: March 22, 2016Assignee: Oshkosh Defense, LLCInventors: Erik S. Ellifson, Patrick S. Dillman, Jason J. Zuleger, Aaron J. Rositch, Robert K. Sollenskog
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Publication number: 20150290993Abstract: A suspension element includes a main body having an internal volume configured to contain a liquid therein, a tubular element extending at least partially within the main body, the tubular element having an internal volume that defines a first fluid chamber configured to contain a compressible gas therein, a first piston separating the internal volume of the main body into a second fluid chamber and a third fluid chamber, a second piston positioned to separate the first fluid chamber from the second fluid chamber, and a flow control element disposed along a flow path between the second fluid chamber and the third fluid chamber. Movement of the tubular element generates a flow of the liquid through the flow control element to produce a damping force and changes the pressure of the compressible gas to produce a spring force.Type: ApplicationFiled: April 10, 2015Publication date: October 15, 2015Applicant: OSHKOSH DEFENSE, LLCInventors: Patrick S. Dillman, Robert K. Sollenskog, Erik Ellifson, Aaron J. Rositch
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Publication number: 20150197129Abstract: A gas spring for a vehicle suspension system includes a cylinder, a rod disposed within the cylinder, the rod and the cylinder defining a chamber, and an accumulator in communication with the chamber. The rod and the cylinder are configured such that a relative movement therebetween changes the volume of the chamber. Gas in the chamber and the accumulator are configured to cooperate to at least partially provide a spring rate that varies based on at least one of a deflection and a spring force associated with at least one of the rod and the cylinder.Type: ApplicationFiled: March 27, 2015Publication date: July 16, 2015Applicant: Oshkosh Defense, LLCInventors: Roy Venton-Walters, Aaron J. Rositch, Jesse L. Knoble, Erik S. Ellifson, Mark L. Steckling
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Patent number: 8991834Abstract: A gas spring for a vehicle suspension system includes a cylinder, a rod disposed within the cylinder, a relative movement between the rod and the cylinder changing the volume of a chamber formed between the rod and the cylinder, and an accumulator in communication with the chamber. Compression of gas in the chamber at least partially provides a first spring rate for deflections of the gas spring below a threshold, compression of gas in the chamber at least partially provides a second spring rate for deflections of the gas spring above the threshold, and the first spring rate is greater than the second spring rate.Type: GrantFiled: June 16, 2014Date of Patent: March 31, 2015Assignee: Oshkosh Defense, LLCInventors: Roy Venton-Walters, Aaron J. Rositch, Jesse L. Knoble, Erik S. Ellifson, Mark L. Steckling
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Publication number: 20140334956Abstract: A pump includes a housing defining an interior volume, a diaphragm partitioning the interior volume into a pumping chamber and an actuating chamber, a diaphragm support associated with the actuating chamber and configured to limit movement of the diaphragm, and a dispersion element coupled to the housing. The dispersion element includes a network of channels that is configured to distribute a fluid within the pump.Type: ApplicationFiled: July 25, 2014Publication date: November 13, 2014Inventors: Roy Venton-Walters, Aaron J. Rositch, Erik Ellifson, Jason J. Zuleger, Joseph Krebs
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Publication number: 20140326555Abstract: A damper assembly for a vehicle suspension system includes a primary damper and a secondary damper coupled to the primary damper. The secondary damper includes a housing, a piston, a conduit, and a valve. The housing includes a sidewall that defines a set of apertures and at least partially surrounds the primary damper, and the volume between the sidewall and the primary damper defines a damping chamber. The piston is positioned within the damping chamber and is slidably coupled to the sidewall. The conduit forms a flow path between the set of apertures, and the valve is disposed along the flow path. The primary damper provides a base damping force, and the secondary damper provides a supplemental damping force that varies based on the position of the piston along the housing.Type: ApplicationFiled: July 17, 2014Publication date: November 6, 2014Inventors: Erik S. Ellifson, Patrick S. Dillman, Jason J. Zuleger, Aaron J. Rositch, Robert K. Sollenskog
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Publication number: 20140291945Abstract: A gas spring for a vehicle suspension system includes a cylinder, a rod disposed within the cylinder, a relative movement between the rod and the cylinder changing the volume of a chamber formed between the rod and the cylinder, and an accumulator in communication with the chamber. Compression of gas in the chamber at least partially provides a first spring rate for deflections of the gas spring below a threshold, compression of gas in the chamber at least partially provides a second spring rate for deflections of the gas spring above the threshold, and the first spring rate is greater than the second spring rate.Type: ApplicationFiled: June 16, 2014Publication date: October 2, 2014Inventors: Roy Venton-Walters, Aaron J. Rositch, Jesse L. Knoble, Erik S. Ellifson, Mark L. Steckling
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Publication number: 20140251742Abstract: A damper assembly is disclosed that includes a tubular member, a rod, a primary piston, a secondary piston, and a seal. The tubular member includes a sidewall and a cap positioned at an end of the sidewall. The sidewall and the cap defining an inner volume. The rod extends within the inner volume of the tubular member. The primary piston defines a contact surface and is positioned within the inner volume and coupled to an end of the rod. The secondary piston defines a central aperture and a channel. Engagement of the primary piston and the secondary piston forms a flow conduit between the channel and the contact surface. The seal is disposed between an outer surface of the secondary piston and the sidewall such that a flow path is formed through the central aperture and the flow conduit.Type: ApplicationFiled: March 10, 2013Publication date: September 11, 2014Applicant: OSHKOSH CORPORATIONInventors: Patrick S. Dillman, Erik S. Ellifson, Aaron J. Rositch
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Patent number: 8821130Abstract: A pump includes a housing defining an interior volume, a diaphragm partitioning the interior volume into a pumping chamber and an actuating chamber, a diaphragm support associated with the actuating chamber and configured to limit movement of the diaphragm, and a dispersion element coupled to the housing. The dispersion element is configured to laterally distribute a fluid within the pump.Type: GrantFiled: July 16, 2013Date of Patent: September 2, 2014Assignee: Oshkosh CorporationInventors: Roy Venton-Walters, Aaron J. Rositch, Erik Ellifson, Jason J. Zuleger, Joseph Krebs
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Patent number: 8801017Abstract: A damper assembly for a vehicle suspension system includes a primary damper and a secondary damper. The secondary damper is coupled to the primary damper and includes a housing and an annular piston. The housing includes a sidewall that partially surrounds the primary damper, and the volume between the sidewall and the primary damper defines a damping chamber. The sidewall defines a plurality of apertures. The annular piston is positioned within the damping chamber and slidably coupled to the sidewall. The primary damper provides a base damping force and the secondary damper provides a supplemental damping force that varies based on the position of the annular piston along the housing.Type: GrantFiled: March 10, 2013Date of Patent: August 12, 2014Assignee: Oshkosh CorporationInventors: Erik S. Ellifson, Patrick S. Dillman, Jason J. Zuleger, Aaron J. Rositch, Robert K. Sollenskog
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Patent number: 8764029Abstract: A gas spring for a vehicle suspension system includes a cylinder, a rod, and an accumulator. The rod is disposed within the cylinder, and relative movement between the rod and the cylinder changes the volume of a chamber formed between the rod and the cylinder. The accumulator is in gaseous communication with the chamber such that a continuous body of gas extends between the chamber and the accumulator.Type: GrantFiled: June 3, 2013Date of Patent: July 1, 2014Assignee: Oshkosh CorporationInventors: Roy Venton-Walters, Aaron J. Rositch, Jesse L. Knoble, Erik Ellifson, Mark L. Steckling
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Patent number: 8596648Abstract: A pump includes a housing defining an interior volume, and a diaphragm, where the diaphragm partitions the interior volume into a pumping chamber and an actuating chamber. The diaphragm is formed from a polymeric material, and the pump further includes a diaphragm support configured to limit a stroke of the diaphragm. The diaphragm support includes an array of apertures through which fluid passes to interface with the diaphragm during operation of the pump.Type: GrantFiled: October 22, 2010Date of Patent: December 3, 2013Assignee: Oshkosh CorporationInventors: Roy Venton-Walters, Aaron J. Rositch, Erik Ellifson, Joseph Krebs, Jason J. Zuleger
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Publication number: 20130300073Abstract: A pump includes a housing defining an interior volume, a diaphragm partitioning the interior volume into a pumping chamber and an actuating chamber, a diaphragm support associated with the actuating chamber and configured to limit movement of the diaphragm, and a dispersion element coupled to the housing. The dispersion element is configured to laterally distribute a fluid within the pump.Type: ApplicationFiled: July 16, 2013Publication date: November 14, 2013Inventors: Roy Venton-Walters, Aaron J. Rositch, Erik Ellifson, Jason J. Zuleger, Joseph Krebs
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Publication number: 20130264784Abstract: A gas spring for a vehicle suspension system includes a cylinder, a rod, and an accumulator. The rod is disposed within the cylinder, and relative movement between the rod and the cylinder changes the volume of a chamber formed between the rod and the cylinder. The accumulator is in gaseous communication with the chamber such that a continuous body of gas extends between the chamber and the accumulator.Type: ApplicationFiled: June 3, 2013Publication date: October 10, 2013Inventors: Roy Venton-Walters, Aaron J. Rositch, Jesse L. Knoble, Erik Ellifson, Mark L. Steckling