Patents by Inventor Michael J. Hartnett
Michael J. Hartnett 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: 11300147Abstract: An expandable sleeve for an interference fastener has a hollow elongate stem extending axially between an insertion end and a head portion. The elongate stem has an inside surface and an outside surface. A portion of the stem has a fluted shape and/or has a cylindrical shape with a conical portion.Type: GrantFiled: June 28, 2019Date of Patent: April 12, 2022Assignee: Roller Bearing Company of America, Inc.Inventors: Michael J. Hartnett, Curtis M. Swartley, Charles Houle, Phil Smith, Giovanni C. Albini
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Patent number: 10731743Abstract: A roller assembly includes an outer ring having an interior having an inner surface extending an overall axial length between first and a second axial ends. The inner surface has a radially inward facing bearing surface extending between first and second radially inwardly extending flanges. The roller assembly includes a one piece inner member extending into the interior and having a groove formed therein between third and a fourth axial ends. A retaining ring is positioned in the groove. A first row of first rollers is positioned in the interior and between the retaining ring and the first radially extending flange. A second row of second rollers is positioned in the interior between the retaining ring and the second radially extending flange. An annular seal engages the inner member and has an overall axial width no more than 6% of the length of the outer ring.Type: GrantFiled: November 28, 2017Date of Patent: August 4, 2020Assignee: Roller Bearing Company of America, Inc.Inventors: James Prescavage, Robert Pallini, Michael J. Hartnett, Robert Lugosi, Bradley T. Smith, Bogdan T. Mania
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Publication number: 20200011360Abstract: An expandable sleeve for an interference fastener has a hollow elongate stem extending axially between an insertion end and a head portion. The elongate stem has an inside surface and an outside surface. A portion of the stem has a fluted shape and/or has a cylindrical shape with a conical portion.Type: ApplicationFiled: June 28, 2019Publication date: January 9, 2020Applicant: Roller Bearing Company of America, Inc.Inventors: Michael J. Hartnett, Curtis M. Swartley, Charles Houle, Phil Smith, Giovanni C. Albini
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Publication number: 20180149257Abstract: A roller assembly includes an outer ring having an interior having an inner surface extending an overall axial length between first and a second axial ends. The inner surface has a radially inward facing bearing surface extending between first and second radially inwardly extending flanges. The roller assembly includes a one piece inner member extending into the interior and having a groove formed therein between third and a fourth axial ends. A retaining ring is positioned in the groove. A first row of first rollers is positioned in the interior and between the retaining ring and the first radially extending flange. A second row of second rollers is positioned in the interior between the retaining ring and the second radially extending flange. An annular seal engages the inner member and has an overall axial width no more than 6% of the length of the outer ring.Type: ApplicationFiled: November 28, 2017Publication date: May 31, 2018Applicant: ROLLER BEARING COMPANY OF AMERICA, INC.Inventors: James Prescavage, Robert Pallini, Michael J. Hartnett, Robert Lugosi, Bradley T. Smith, Bogdan T. Mania
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Patent number: 9982768Abstract: A cam follower assembly includes a shaft having a body defining a flanged head having an outer bearing surface extending therefrom. An outer ring is positioned around the shaft thereby forming an annular space there between. A plurality of rollers is positioned in the annular space. A channel extends through the shaft and branches radially outward at an outlet to communicate with the annular space. A lubrication assembly is positioned in the shaft and includes a pressurizing device located upstream of a lubrication reservoir and a metering device positioned downstream of the lubrication reservoir. The lubrication reservoir is in fluid communication with the outlet. The lubrication assembly includes a membrane positioned downstream of the lubrication reservoir. A piercing device is positioned proximate the membrane to pierce the membrane and release a lubricant from the lubrication reservoir.Type: GrantFiled: September 25, 2015Date of Patent: May 29, 2018Assignee: Roller Bearing Company of America, Inc.Inventors: Michael J. Hartnett, Robert Lugosi
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Publication number: 20160091072Abstract: A cam follower assembly includes a shaft having a body defining a flanged head having an outer bearing surface extending therefrom. An outer ring is positioned around the shaft thereby forming an annular space there between. A plurality of rollers is positioned in the annular space. A channel extends through the shaft and branches radially outward at an outlet to communicate with the annular space. A lubrication assembly is positioned in the shaft and includes a pressurizing device located upstream of a lubrication reservoir and a metering device positioned downstream of the lubrication reservoir. The lubrication reservoir is in fluid communication with the outlet. The lubrication assembly includes a membrane positioned downstream of the lubrication reservoir. A piercing device is positioned proximate the membrane to pierce the membrane and release a lubricant from the lubrication reservoir.Type: ApplicationFiled: September 25, 2015Publication date: March 31, 2016Applicant: Roller Bearing Company of America, Inc.Inventors: Michael J. Hartnett, Robert Lugosi
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Patent number: 4858295Abstract: Axially spaced cams and bearing rings mounted on a tube are permanently secured to the tube by circumferentially spaced projections on the tube extending into grooves formed on the inside surfaces of the cams and bearing rings.Type: GrantFiled: March 14, 1988Date of Patent: August 22, 1989Assignee: The Torrington CompanyInventors: Michael J. Hartnett, Robert Lugosi, James Rollins, John P. Cook, Jeffrey A. Clark
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Patent number: 4781076Abstract: Axially spaced cams and bearing rings mounted on a tube are permanently secured to the tube by circumferentially spaced projections on the tube extending into grooves formed on the inside surfaces of the cams and bearing rings.Type: GrantFiled: January 17, 1986Date of Patent: November 1, 1988Assignee: The Torrington CompanyInventors: Michael J. Hartnett, Robert Lugosi, James Rollins, John P. Cook, Jeffrey A. Clark
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Patent number: 4456313Abstract: Each roller in a roller bearing has varying diameters along its length. The longitudinal surface is formed along varying radii of curvature. The diameters are functions of the contact stress along the roller, the length of the roller, any angular misalignment, and the effective diameter of the bearing. The varying diameters are such that a uniform contact stress is placed on each roller.If desired instead of the rollers, a race may be shaped to cause the uniform contact stress.Type: GrantFiled: September 16, 1982Date of Patent: June 26, 1984Assignee: The Torrington CompanyInventors: Michael J. Hartnett, Chris J. Robinson, Edwin B. Tharp
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Patent number: 4192560Abstract: An annular cage for the rollers of a bearing is located in the annular space between two bearing races and is normally spaced from both races when concentric. The cage is so constructed that, when unbalanced forces on the cage during rotation in the bearing tend to move the cage from its concentric position into contact with a piloting surface, hydrodynamic forces are developed which act to keep the cage out of contact with that surface.Type: GrantFiled: August 21, 1978Date of Patent: March 11, 1980Assignee: The Torrington CompanyInventor: Michael J. Hartnett
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Patent number: RE33888Abstract: Axially spaced cams and bearing rings mounted on a tube are permanently secured to the tube by circumferentially spaced projections on the tube extending into grooves formed on the inside surfaces of the cams and bearing rings.Type: GrantFiled: January 31, 1991Date of Patent: April 21, 1992Assignee: The Torrington CompanyInventors: Michael J. Hartnett, Robert Lugosi, James Rollins, John P. Cook, Jeffrey A. Clark
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Patent number: RE34565Abstract: Axially spaced cams and bearing rings mounted on a tube are permanently secured to the tube by circumferentially spaced projections on the tube extending into grooves formed on the inside surfaces of the cams and bearing rings.Type: GrantFiled: June 24, 1992Date of Patent: March 22, 1994Assignee: The Torrington CompanyInventors: Michael J. Hartnett, Robert Lugosi, James Rollins, John P. Cook, Jeffrey A. Clark