Patents by Inventor Rory S. Pawl
Rory S. Pawl 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: 9500106Abstract: A valve stem seal utilizes a multi-piece construction to reduce the required manufactured tolerances and/or improve the stress handling capabilities. The valve stem seal can include a first member or can which can be assembled to a second member or spring seat. The can and/or spring seat can have a plurality of axially extending resilient fingers that are biased such that when assembled the fingers are bent against the bias due to the engagement between the can and the spring seat. The fingers on the spring seat allow the spring seat to bend or move relative to the can to accommodate the loading of a valve spring on the spring seat. The use of resilient fingers on the can and/or the spring seat reduces the manufacturing tolerances required for the valve stem seal.Type: GrantFiled: May 20, 2009Date of Patent: November 22, 2016Assignee: Freudenberg—NOK General PartnershipInventors: Rory S. Pawl, Patrick L. Scheib, John A. London
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Publication number: 20150354703Abstract: A dynamic shaft seal assembly is provided including a dynamic seal for engaging a rotary shaft. The dynamic seal includes a mounting portion that is mounted within a casing and has an axially extending barrel portion extending from a radially inner end of the mounting portion. The axially extending barrel portion terminates in a radially extending leg portion which extends inwardly from an end of the axially extending portion. A generally conically shaped seal portion extends from an end of the radially extending portion and the seal portion includes a radially inner face engaging the shaft and a radially outer face having a stiffening bead integrally formed thereon. The mounting portion defines a bumper spaced from the axially extending barrel portion by a gap distance that is designed to prevent the seal lip from inverting under sustained high pressure or pressure spikes.Type: ApplicationFiled: August 20, 2015Publication date: December 10, 2015Inventors: Alexander BERDICHEVSKY, Rory S. PAWL, Patrick L. SCHEIB
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Publication number: 20140021687Abstract: A dynamic shaft seal assembly is provided including a dynamic seal for engaging a rotary shaft. The dynamic seal includes a mounting portion that is mounted within a casing and has an axially extending barrel portion extending from a radially inner end of the mounting portion. The axially extending barrel portion terminates in a radially extending leg portion which extends inwardly from an end of the axially extending portion. A generally conically shaped seal portion extends from an end of the radially extending portion and the seal portion includes a radially inner face engaging the shaft and a radially outer face having a stiffening bead integrally formed thereon. The mounting portion defines a bumper spaced from the axially extending barrel portion by a gap distance that is designed to prevent the seal lip from inverting under sustained high pressure or pressure spikes.Type: ApplicationFiled: September 20, 2013Publication date: January 23, 2014Applicant: FREUDENBERG-NOK GENERAL PARTNERSHIPInventors: Alexander BERDICHEVSKY, Rory S. PAWL, Patrick L. SCHEIB
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Patent number: 8601991Abstract: A valve stem seal assembly in an internal combustion engine includes a cylinder head including an aperture therein in communication with a cylinder bore and a recessed pocket surrounding the aperture. A valve guide is received in the aperture and a valve stem is received in the valve guide. A valve seal support includes a radially outwardly extending flange disposed against a surface of the cylinder head external to the recessed pocket and a cylindrical body that extends into the recessed pocket. A valve spring contacts the flange and a resilient seal is secured to the rigid valve seal support and in sealing engagement with the valve stem.Type: GrantFiled: August 2, 2011Date of Patent: December 10, 2013Assignee: Freudenberg-NOK General PartnershipInventors: Rory S. Pawl, Patrick L. Scheib, John A. London
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Patent number: 8590903Abstract: A dynamic shaft seal assembly is provided including a dynamic seal for engaging a rotary shaft. The dynamic seal includes a mounting portion that is mounted within a casing and has an axially extending barrel portion extending from a radially inner end of the mounting portion. The axially extending barrel portion terminates in a radially extending leg portion which extends inwardly from an end of the axially extending portion. A generally conically shaped seal portion extends from an end of the radially extending portion and the seal portion includes a radially inner face engaging the shaft and a radially outer face having a stiffening bead integrally formed thereon. The mounting portion defines a bumper spaced from the axially extending barrel portion by a gap distance that is designed to prevent the seal lip from inverting under sustained high pressure or pressure spikes.Type: GrantFiled: March 24, 2009Date of Patent: November 26, 2013Assignee: Freudenberg-NOK General PartnershipInventors: Alexander Berdichevsky, Rory S. Pawl, Patrick Scheib
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Publication number: 20130032118Abstract: A valve stem seal assembly in an internal combustion engine includes a cylinder head including an aperture therein in communication with a cylinder bore and a recessed pocket surrounding the aperture. A valve guide is received in the aperture and a valve stem is received in the valve guide. A valve seal support includes a radially outwardly extending flange disposed against a surface of the cylinder head external to the recessed pocket and a cylindrical body that extends into the recessed pocket. A valve spring contacts the flange and a resilient seal is secured to the rigid valve seal support and in sealing engagement with the valve stem.Type: ApplicationFiled: August 2, 2011Publication date: February 7, 2013Applicant: FREUDENBERG-NOK GENERAL PARTNERSHIPInventors: Rory S. Pawl, Patrick L. Scheib, John A. London
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Publication number: 20100295252Abstract: A valve stem seal utilizes a multi-piece construction to reduce the required manufactured tolerances and/or improve the stress handling capabilities. The valve stem seal can include a first member or can which can be assembled to a second member or spring seat. The can and/or spring seat can have a plurality of axially extending resilient fingers that are biased such that when assembled the fingers are bent against the bias due to the engagement between the can and the spring seat. The fingers on the spring seat allow the spring seat to bend or move relative to the can to accommodate the loading of a valve spring on the spring seat. The use of resilient fingers on the can and/or the spring seat reduces the manufacturing tolerances required for the valve stem seal.Type: ApplicationFiled: May 20, 2009Publication date: November 25, 2010Applicant: FREUDENBERG-NOK GENERAL PARTNERSHIPInventors: Rory S. Pawl, Patrick L. Scheib, John A. London
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Publication number: 20100244390Abstract: A dynamic shaft seal assembly is provided including a dynamic seal for engaging a rotary shaft. The dynamic seal includes a mounting portion that is mounted within a casing and has an axially extending barrel portion extending from a radially inner end of the mounting portion. The axially extending barrel portion terminates in a radially extending leg portion which extends inwardly from an end of the axially extending portion. A generally conically shaped seal portion extends from an end of the radially extending portion and the seal portion includes a radially inner face engaging the shaft and a radially outer face having a stiffening bead integrally formed thereon. The mounting portion defines a bumper spaced from the axially extending barrel portion by a gap distance that is designed to prevent the seal lip from inverting under sustained high pressure or pressure spikes.Type: ApplicationFiled: March 24, 2009Publication date: September 30, 2010Applicant: FREUDENBERG-NOK GENERAL PARTNERSHIPInventors: Alexander Berdichevsky, Rory S. Pawl, Patrick Scheib
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Patent number: 7508198Abstract: A shaft assembly, includes an elongated shaft and a flywheel mounted to an end of the shaft. An encoder is mounted to the shaft and includes an annular support ring having a radially inwardly extending portion and an axially extending portion extending from a radially outer end of the radially inwardly extending portion. The radially inwardly extending portion defines a spring section which is compressed between the flywheel and the end of the shaft, and an encoder material is disposed on the axially extending portion of the annular support ring.Type: GrantFiled: July 30, 2007Date of Patent: March 24, 2009Assignee: Freudenberg-NOK General PartnershipInventors: Rory S. Pawl, Chad D. Bauer
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Publication number: 20090033168Abstract: A shaft assembly, includes an elongated shaft and a flywheel mounted to an end of the shaft. An encoder is mounted to the shaft and includes an annular support ring having a radially inwardly extending portion and an axially extending portion extending from a radially outer end of the radially inwardly extending portion. The radially inwardly extending portion defines a spring section which is compressed between the flywheel and the end of the shaft, and an encoder material is disposed on the axially extending portion of the annular support ring.Type: ApplicationFiled: July 30, 2007Publication date: February 5, 2009Applicant: FREUDENBERG-NOK GENERAL PARTNERSHIPInventors: Rory S. Pawl, Chad D. Bauer