Patents by Inventor Thomas Kopel
Thomas Kopel 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: 9181958Abstract: A hydrostatic apparatus is disclosed. The hydrostatic apparatus comprises a pump, an input shaft, a fan and a fan shroud. The pump comprises a housing, an end cap, a first end and a second end. The input shaft extending from the first end and the second end of the pump. The fan is attached to one end of the input shaft. The fan shroud is also attached to the pump.Type: GrantFiled: August 29, 2014Date of Patent: November 10, 2015Assignee: Hydro-Gear Limited PartnershipInventors: Thomas Kopel, Thomas A. Roth, Thomas P. Gavin, B. Keith Harshman, Bryce E. Steenburg, Raymond Hauser, Lonnie E. Holder
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Patent number: 8858198Abstract: A hydrostatic apparatus is disclosed. The hydrostatic apparatus comprises a pump, an input shaft, a fan and a fan shroud. The pump comprises a housing, an end cap, a first end and a second end. The input shaft extending from the first end and the second end of the pump. The fan is attached to one end of the input shaft. The fan shroud is also attached to the pump.Type: GrantFiled: July 19, 2013Date of Patent: October 14, 2014Assignee: Hydro-Gear Limited PartnershipInventors: Thomas Kopel, Thomas A. Roth, Thomas P. Gavin, B. Keith Harshman, Bryce E. Steenburg, Raymond Hauser, Lonnie E. Holder
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Patent number: 7320334Abstract: A valve for use in regulating the flow of fluid between a first fluid side and a second fluid side of a hydraulic circuit. A bore is extended through a valve seat, and the bore and valve stem cooperate to form a fluid passage from the first side to the second side. A plurality of ribs are located on one side of the valve seat and extend in a direction generally parallel to the bore.Type: GrantFiled: June 13, 2006Date of Patent: January 22, 2008Assignee: Hydro-Gear Limited PartnershipInventors: Robert E. Trimble, Tage Christiansen, Anders Kryhlmand, Thomas Kopel
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Patent number: 7066199Abstract: A valve assembly for use in regulating the flow of fluid between a first fluid side and a second fluid side of a hydraulic circuit. The valve includes a valve guide, a valve stem engaged to the valve guide and a valve seat. A bore is extended through the valve seat, and the bore and valve stem cooperate to form a fluid passage from the first side to the second side.Type: GrantFiled: September 15, 2005Date of Patent: June 27, 2006Assignee: Hydro-Gear Limited PartnershipInventors: Robert E. Trimble, Tage Christiansen, Anders Kryhlmand, Thomas Kopel
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Patent number: 6986363Abstract: A valve assembly for use in regulating the flow of fluid between a first fluid side and a second fluid side of a hydraulic circuit. The assembly has an insert mounted in a hydraulic component having at least a portion of the hydraulic circuit formed therein, the insert also has a first end exposed to the first fluid side, a first end opening formed on the first end and a second end open to the second fluid side. The valve assembly additionally has a valve plug retained within the second end of the insert and a valve seat surface formed on the first end of the insert. The valve assembly also has a combination check valve and pressure relief valve located within the insert between the valve seat surface and the valve plug to selectively open and close the first opening.Type: GrantFiled: June 8, 2004Date of Patent: January 17, 2006Assignee: Hydro-Gear Limited PartnershipInventors: Robert E. Trimble, Tage Christiansen, Anders Kryhlmand, Thomas Kopel
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Patent number: 6964280Abstract: A combination check valve and pressure relief valve is provided for use in regulating the flow of fluid between a first fluid side and a second fluid side. The combination check valve and pressure relief valve includes a valve plug, a valve guide moveably positioned in relation to the valve plug, a valve stem engaged to the valve guide, a check compression spring attached to the valve stem and positioned between the valve guide and the valve plug, a valve seat carried by the valve stem, and a relief compression spring positioned between the valve seat and the valve guide. The valve guide is adapted to move the valve stem relative to the valve seat against the force of the relief compression spring to allow fluid to pass from the first fluid side to the second fluid side through a fluid flow passage formed between the valve stem and the valve seat.Type: GrantFiled: March 17, 2005Date of Patent: November 15, 2005Assignee: Hydro-Gear Limited PartnershipInventors: Robert E. Trimble, Tage Christiansen, Anders Kryhlmand, Thomas Kopel
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Publication number: 20050220637Abstract: A hydrostatic apparatus is disclosed. The hydrostatic apparatus comprises a pump, an input shaft, a fan and a fan shroud. The pump comprises a housing, an end cap, a first end and a second end. The input shaft extending from the first end and the second end of the pump. The fan is attached to one end of the input shaft. The fan shroud is also attached to the pump.Type: ApplicationFiled: March 24, 2005Publication date: October 6, 2005Applicant: Hydro-Gear Limited PartnershipInventors: Thomas Kopel, Thomas Roth, Thomas Gavin, Keith Harshman, Bryce Steenburg, Raymond Hauser, Lonnie Holder
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Patent number: 6840042Abstract: An internal filter that may be installed or removed from the outside of the housing. The internal filter may also cooperate with an inlet passage for a charge pump.Type: GrantFiled: June 17, 2003Date of Patent: January 11, 2005Assignee: Hydro-Gear Limited PartnershipInventors: Michael Taylor, Jeffrey A. Wilson, Thomas Kopel, Neil Brandenburg
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Patent number: 6691512Abstract: A combination check valve and pressure relief valve is provided for use in regulating the flow of fluid between a first fluid side and a second fluid side in a hydraulic circuit. The combination check valve and pressure relief valve includes a valve plug, a valve guide moveably positioned in relation to the valve plug, a valve stem engaged to the valve guide, a check compression spring attached to the valve stem and positioned between the valve guide and the valve plug, a valve seat carried by the valve stem, and a relief compression spring positioned between the valve seat and the valve guide.Type: GrantFiled: April 3, 2002Date of Patent: February 17, 2004Assignee: Hydro-Gear Limited PartnershipInventors: Thomas Kopel, Robert E. Trimble, Tage Christiansen, Anders Kryhlmand