Patents by Inventor David R. Koehler
David R. Koehler 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: 9931843Abstract: A print head includes a substrate having a hole, a circuit on the substrate, the circuit having traces and a hole corresponding to the hole in the substrate, the hole forming a fluid path, and a raised structure on the substrate around the fluid path, the raised structure positioned to seal the circuit from the fluid path.Type: GrantFiled: October 4, 2017Date of Patent: April 3, 2018Assignee: XEROX CORPORATIONInventors: Jonathan R. Brick, Chad D. Freitag, Garry A. Jones, Jon G. Judge, David R. Koehler, Chad J. Slenes, Peter J. Nystrom, Gary D. Redding, Mark A. Cellura
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Publication number: 20180022094Abstract: A print head includes a substrate having a hole, a circuit on the substrate, the circuit having traces and a hole corresponding to the hole in the substrate, the hole forming a fluid path, and a raised structure on the substrate around the fluid path, the raised structure positioned to seal the circuit from the fluid path.Type: ApplicationFiled: October 4, 2017Publication date: January 25, 2018Inventors: JONATHAN R. BRICK, CHAD D. FREITAG, GARRY A. JONES, JON G. JUDGE, DAVID R. KOEHLER, CHAD J. SLENES, PETER J. NYSTROM, GARY D. REDDING, MARK A. CELLURA
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Patent number: 9802408Abstract: A print head includes a substrate having a hole, a circuit on the substrate, the circuit having traces and a hole corresponding to the hole in the substrate, the hole forming a fluid path, and a raised structure on the substrate around the fluid path, the raised structure positioned to seal the circuit from the fluid path.Type: GrantFiled: February 24, 2015Date of Patent: October 31, 2017Assignee: XEROX CORPORATIONInventors: Jonathan R. Brick, Chad D. Freitag, Garry A. Jones, Jon G. Judge, David R. Koehler, Chad J. Slenes, Peter J. Nystrom, Gary D. Redding, Mark A. Cellura
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Publication number: 20160243828Abstract: A print head includes a substrate having a hole, a circuit on the substrate, the circuit having traces and a hole corresponding to the hole in the substrate, the hole forming a fluid path, and a raised structure on the substrate around the fluid path, the raised structure positioned to seal the circuit from the fluid path.Type: ApplicationFiled: February 24, 2015Publication date: August 25, 2016Inventors: JONATHAN R. BRICK, CHAD D. FREITAG, GARRY A. JONES, JON G. JUDGE, DAVID R. KOEHLER, CHAD J. SLENES, PETER J. NYSTROM, GARY D. REDDING, MARK A. CELLURA
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Patent number: 9278542Abstract: A printhead including a printhead body and a filter assembly that is removably attached to the printhead body with one or more mechanical fasteners. The filter assembly can include at least a first plate, a second plate, and a filter interposed between the first plate and the second plate. The removable filter assembly can be used to filter a single fluid, such as a liquid ink or a gas, or two or more fluids, using one or more filters. The filter assembly can be removed from the printhead body and replaced with a new or different filter assembly.Type: GrantFiled: June 29, 2015Date of Patent: March 8, 2016Assignee: XEROX CORPORATIONInventors: David R. Koehler, Blake T. Weimer
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Patent number: 8550612Abstract: An inkjet printing apparatus is provided with a one-way valve to enable a single conduit to supply ink to an ink reservoir and withdraw purged ink from a receptacle into the ink reservoir. A bi-directional pump is operated in both directions in an alternating manner to withdraw ink from the receptacle when supplying the ink reservoir with ink.Type: GrantFiled: October 20, 2010Date of Patent: October 8, 2013Assignee: Xerox CorporationInventors: Daniel Clark Park, Isaac S. Frazier, David P. Platt, David R. Koehler
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Publication number: 20120224167Abstract: Apparatus and method for chemical, biological and radiological agent sensing. The sensing apparatus includes a plurality of resonators each having a resonance frequency and an optical fiber coil. The optical fiber coils have cladding and an indicator embedded in the cladding that reacts to an agent (chemical or biological substance) or a dopant that darkens with radiation. The resonator circulates light through the coil and produces a resonance shape centered at the resonance frequency and measured via the input light. A predetermined change in the resonance shape indicates a presence of the agent in the environment.Type: ApplicationFiled: July 18, 2007Publication date: September 6, 2012Applicant: Honeywell International, Inc.Inventors: Glen A. Sanders, David R. Koehler
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Patent number: 8177339Abstract: A fluid dispensing assembly has a fluid reservoir, a reservoir structure having at least one opening corresponding to a location of at least one fluid chamber in the reservoir structure, and a compliant film arranged to seal the opening and flex in response to pressure fluctuations in the fluid chamber. A system has a fluid supply, a fluid dispensing assembly having a fluid reservoir to receive fluid from the fluid supply, the fluid dispensing assembly having a reservoir structure with at least one opening corresponding to at least one fluid chamber, and a compliant film arranged to cover the opening such that a side of the film contacts fluid in the chamber and a side opposite the side contacting the fluid contacts air and is arranged to allow the film to flex.Type: GrantFiled: August 19, 2008Date of Patent: May 15, 2012Assignee: Xerox CorporationInventors: Terrance L. Stephens, Jonathan R. Brick, John R. Andrews, David P. Platt, David R. Koehler, Christopher J. Laharty
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Publication number: 20120098898Abstract: An inkjet printing apparatus is provided with a one-way valve to enable a single conduit to supply ink to an ink reservoir and withdraw purged ink from a receptacle into the ink reservoir. A bi-directional pump is operated in both directions in an alternating manner to withdraw ink from the receptacle when supplying the ink reservoir with ink.Type: ApplicationFiled: October 20, 2010Publication date: April 26, 2012Applicant: Xerox CorporationInventors: Daniel Clark Park, Isaac S. Frazier, David P. Platt, David R. Koehler
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Publication number: 20100045754Abstract: A fluid dispensing assembly has a fluid reservoir, a reservoir structure having at least one opening corresponding to a location of at least one fluid chamber in the reservoir structure, and a compliant film arranged to seal the opening and flex in response to pressure fluctuations in the fluid chamber. A system has a fluid supply, a fluid dispensing assembly having a fluid reservoir to receive fluid from the fluid supply, the fluid dispensing assembly having a reservoir structure with at least one opening corresponding to at least one fluid chamber, and a compliant film arranged to cover the opening such that a side of the film contacts fluid in the chamber and a side opposite the side contacting the fluid contacts air and is arranged to allow the film to flex.Type: ApplicationFiled: August 19, 2008Publication date: February 25, 2010Applicant: XEROX CORPORATIONInventors: Terrance L. Stephens, Jonathan R. Brick, John R. Andrews, David P. Platt, David R. Koehler, Christopher J. Laharty
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Patent number: 7455387Abstract: A printhead is provided that includes a waste ink drip bib located adjacent to the lower edge of the printhead face and includes a funnel structure to direct the flow of waste ink to a centrally located lower opening.Type: GrantFiled: September 30, 2005Date of Patent: November 25, 2008Inventors: James Matthew Cunnington, David R. Koehler
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Patent number: 7383774Abstract: A two-stage acceleration sensing apparatus is disclosed which has applications for use in a fuze assembly for a projected munition. The apparatus, which can be formed by bulk micromachining or LIGA, can sense acceleration components along two orthogonal directions to enable movement of a shuttle from an “as-fabricated” position to a final position and locking of the shuttle in the final position. With the shuttle moved to the final position, the apparatus can perform one or more functions including completing an explosive train or an electrical switch closure, or allowing a light beam to be transmitted through the device.Type: GrantFiled: March 22, 2006Date of Patent: June 10, 2008Assignee: Sandia CorporationInventors: David R. Koehler, Darren A. Hoke, Louis S. Weichman, George E. Vernon, Randy J. Shul, Michael H. Beggans
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Publication number: 20080122912Abstract: A printhead reservoir has an input ink port and a chamber to receive ink from an ink source through the input ink port. The reservoir also has a filter in a path between the input ink port and the chamber. A printhead includes a reservoir having an input ink port, a chamber to receive ink from an ink source through the input port and a filter in a path between the input port and the storage plate. The printhead also includes an array of jets to draw ink from the chamber and control circuitry to control the jets so as to selectively output ink through the jets onto a substrate. A reservoir has a filter to receive ink, a vented chamber to collect ink received from the filter and at least one jet to receive ink from the vented chamber. The vented chamber is between the ink filter and the fluid path to the jets in order to remove the filter portion of the pressure drop to the jets.Type: ApplicationFiled: November 27, 2006Publication date: May 29, 2008Applicant: XEROX CORPORATIONInventors: David P Platt, David R Koehler, Terrance L. Stephens, James D Padgett
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Publication number: 20080122901Abstract: A printhead reservoir includes at least one ink reservoir to hold ink and at least one umbilical to deliver ink to the ink reservoir under pressure. A filter resides between the umbilical and the ink reservoir having meniscus strength sufficient enough to prevent the reservoir from draining when the pressure is removed or if a pressure is applied downstream of the filter. The filter may reside above the ink reservoir to further reduce the ink drain back. The reservoir may also include a weir plate to allow the filter to reside below the ink level.Type: ApplicationFiled: November 29, 2006Publication date: May 29, 2008Inventors: David P. Platt, David R. Koehler, Shawn M. Close, Michael F. Deily, William B. Weaver
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Patent number: 7300143Abstract: A fluid reservoir apparatus including a housing having input ports in a rear portion of the housing and output ports in a front portion of the housing, fluidic chambers and fluidic channels extending from the input ports to the output ports, a heater structure disposed in the housing, a plurality of datum standoffs having rounded datum ends disposed at the rear portion of the housing.Type: GrantFiled: April 5, 2005Date of Patent: November 27, 2007Assignee: Xerox CorporationInventors: Steven R. Slotto, Brian E. Sonnichsen, Eric Segerstrom, David R. Koehler
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Patent number: 7051656Abstract: A two-stage acceleration sensing apparatus is disclosed which has applications for use in a fuze assembly for a projected munition. The apparatus, which can be formed by bulk micromachining or LIGA, can sense acceleration components along two orthogonal directions to enable movement of a shuttle from an “as-fabricated” position to a final position and locking of the shuttle in the final position. With the shuttle moved to the final position, the apparatus can perform one or more functions including completing an explosive train or an electrical switch closure, or allowing a light beam to be transmitted through the device.Type: GrantFiled: August 14, 2003Date of Patent: May 30, 2006Assignee: Sandia CorporationInventors: David R. Koehler, Darren A. Hoke, Louis S. Weichman, George E. Vernon, Randy J. Shul, Michael H. Beggans
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Patent number: 6634472Abstract: A tuned mass damper includes a container having first and second inside wall portions, and a proof mass disposed within the container. Multiple pairs of oppositely directed bellows containing damping fluid are connected between the wall portions and the mass to permit motion of the mass along primary axes. A spring is connected in series with each pair of bellows. The spring has a diameter substantially less than a diameter of the corresponding pair of bellows so that the spring and bellows allow translational movement of the mass about an axis other than the primary axes.Type: GrantFiled: April 3, 2002Date of Patent: October 21, 2003Inventors: Toren S. Davis, David R. Koehler, James H. Boyd
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Publication number: 20030188941Abstract: A tuned mass damper includes a container having first and second inside wall portions, and a proof mass disposed within the container. Multiple pairs of oppositely directed bellows containing damping fluid are connected between the wall portions and the mass to permit motion of the mass along primary axes. A spring is connected in series with each pair of bellows. The spring has a diameter substantially less than a diameter of the corresponding pair of bellows so that the spring and bellows allow translational movement of the mass about an axis other than the primary axes.Type: ApplicationFiled: April 3, 2002Publication date: October 9, 2003Inventors: Toren S. Davis, David R. Koehler, James H. Boyd
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Patent number: 5647561Abstract: A system for releasably restraining a first element and a second element is disclosed. The containment system uses a tensioner to urge a clamp into contact with the first element and with the second element, and a release selectively operates the tensioner to remove the clamp from contact with the first and second elements to permit relative movement therebetween. The clamp is particularly useful in maintaining a gap between the first and second elements which permits relative movement between the first and second elements after the clamp is removed.Type: GrantFiled: August 12, 1993Date of Patent: July 15, 1997Assignee: Honeywell Inc.Inventors: Wilfred Robinson, David R. Koehler