Patents by Inventor Joseph M. Crowley
Joseph M. Crowley 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).
-
Patent number: 9687864Abstract: This disclosure describes the application of a supplemental corona source to provide surface charge on submicrometer particles to enhance collection efficiency and micro-structural density during electrostatic collection.Type: GrantFiled: June 20, 2014Date of Patent: June 27, 2017Assignee: Battelle Memorial InstituteInventors: John L. Fulton, George S. Deverman, Dean W. Matson, Clement R. Yonker, C. Douglas Taylor, James B. McClain, Joseph M. Crowley
-
Publication number: 20150040827Abstract: This disclosure describes the application of a supplemental corona source to provide surface charge on submicrometer particles to enhance collection efficiency and micro-structural density during electrostatic collection.Type: ApplicationFiled: June 20, 2014Publication date: February 12, 2015Inventors: John L. Fulton, George S. Deverman, Dean W. Matson, Clement R. Yonker, C. Douglas Taylor, James B. McClain, Joseph M. Crowley
-
Patent number: 8795762Abstract: This disclosure describes the application of a supplemental corona source to provide surface charge on submicrometer particles to enhance collection efficiency and micro-structural density during electrostatic collection.Type: GrantFiled: March 26, 2010Date of Patent: August 5, 2014Assignee: Battelle Memorial InstituteInventors: John L. Fulton, George S. Deverman, Dean W. Matson, Clement R. Yonker, C. Douglas Taylor, James B. McClain, Joseph M. Crowley
-
Publication number: 20110238161Abstract: This disclosure describes the application of a supplemental corona source to provide surface charge on submicrometer particles to enhance collection efficiency and micro-structural density during electrostatic collection.Type: ApplicationFiled: March 26, 2010Publication date: September 29, 2011Applicants: BATTELLE MEMORIAL INSTITUTE, MICELL TECHNOLOGIESInventors: John L. Fulton, George S. Deverman, Dean W. Matson, Clement R. Yonker, C. Douglas Taylor, James B. McClain, Joseph M. Crowley
-
Patent number: 6846377Abstract: Methods and systems consistent with the present invention can be used to assemble composite rotatable-element components and can be used to form a laminate substrate system, and use a plurality of rotatable-element components or rotatable-element component material of two classes. Each class is defined by a common response or responses to incident electromagnetic radiation of interest.Type: GrantFiled: July 8, 2002Date of Patent: January 25, 2005Assignee: Xerox CorporationInventors: David K. Biegelsen, Joseph M. Crowley, Alexander E. Silverman
-
Patent number: 6540947Abstract: A bi-chromal ball production apparatus and method where the bi-chromal ball material is fed from opposite sides of the disk, reconfiguring the internal geometry of the apparatus, and precisely configuring the bi-chromal ball material feeding slit. The bi-chromal ball production apparatus has a disk that rotates, a first supply structure that supplies a first bi-chromal ball material to the disk from a first direction, a second supply structure tube that supplies a second bi-chromal ball material to the disk from a second direction and a motor that rotates the disk. The bi-chromal ball production apparatus includes a first reservoir and a first slit defined by the disk and a top body, a second reservoir and a second slit defined by the disk and a bottom body. An inner surface of each of the first and second reservoir is parabola shaped.Type: GrantFiled: December 28, 2000Date of Patent: April 1, 2003Assignee: Xerox CorporationInventors: Dennis Martell, Nicholas K. Sheridan, Joseph M. Crowley, Matthew E. Howard, Michelle Anne Remus
-
Patent number: 6497942Abstract: A gyricon or twisting-particle display based on nonspheroidal (e.g., substantially cylindrical) optically anisotropic particles disposed in a substrate. The particles can be either bichromal or polychromal cylinders, preferably aligned parallel to one another and packed close together in a monolayer. A rotatable disposition of each particle is achievable while the particle is thus disposed in the substrate; for example, the particles can already be rotatable in the substrate, or can be rendered rotatable in the substrate by a nondestructive operation performed on the substrate. In particular, the substrate can be made up of an elastomer that is expanded by application of a fluid thereto so as to render the particles rotatable therein. A particle, when in its rotatable disposition, is not attached to the substrate. The close-packed monolayer configuration of particles provides excellent brightness characteristics and relative ease of manufacture as compared with certain other high-brightness gyricon displays.Type: GrantFiled: October 2, 2001Date of Patent: December 24, 2002Assignee: Xerox CorporationInventors: Nicholas K. Sheridon, Joseph M. Crowley
-
Publication number: 20020185216Abstract: Methods and systems consistent with the present invention can be used to assemble composite rotatable-element components and can be used to form a laminate substrate system, and use a plurality of rotatable-element components or rotatable-element component material of two classes. Each class is defined by a common response or responses to incident electromagnetic radiation of interest.Type: ApplicationFiled: July 8, 2002Publication date: December 12, 2002Applicant: Xerox CorporationInventors: David K. Biegelsen, Joseph M. Crowley, Alexander E. Silverman
-
Patent number: 6472332Abstract: Structures for use in conjunction with surface micromachined structures are formed using a two-step etching process. In various exemplary embodiments, the two-step etching process comprises a modified Bosch etch. According to various exemplary embodiments of the two-step etch, first mask and second masks are used to prepare a layer for etching one or more desired structures. The first mask is used to define at least one large feature. The second mask is used to define at least one small feature (small as compared to the at least one large feature). The second mask is formed over the first mask which is formed over the layer. In the first etching step, the at least one small feature is etched into the layer. Then, the second mask is removed using the chemical rinsing agent. In the second etching step, the at least one large feature is etched into the layer such that the at least one small feature propagates further into the layer ahead of the at least one large feature. The first mask is then removed.Type: GrantFiled: November 28, 2000Date of Patent: October 29, 2002Assignee: Xerox CorporationInventors: Arthur M. Gooray, George J. Roller, Joseph M. Crowley, Paul C. Galambos, Frank J. Peter, Kevin R. Zavadil, Richard C. Givler, Randy J. Shul, Christi Willison Gober
-
Patent number: 6440252Abstract: Methods and systems consistent with the present invention can be used to assemble composite rotatable-element components and can be used to form a laminate substrate system, and use a plurality of rotatable-element components or rotatable-element component material of two classes. Each class is defined by a common response or responses to incident electromagnetic radiation of interest.Type: GrantFiled: December 17, 1999Date of Patent: August 27, 2002Assignee: Xerox CorporationInventors: David K. Biegelsen, Joseph M. Crowley, Alexander E. Silverman
-
Patent number: 6428868Abstract: A gyricon or twisting-particle display based on nonspheroidal (e.g., substantially cylindrical) optically anisotropic particles disposed in a substrate. The particles can be either bichromal or polychromal cylinders, preferably aligned parallel to one another and packed close together in a monolayer. A rotatable disposition of each particle is achievable while the particle is thus disposed in the substrate; for example, the particles can already be rotatable in the substrate, or can be rendered rotatable in the substrate by a nondestructive operation performed on the substrate. In particular, the substrate can be made up of an elastomer that is expanded by application of a fluid thereto so as to render the particles rotatable therein. A particle, when in its rotatable disposition, is not attached to the substrate. The close-packed monolayer configuration of particles provides excellent brightness characteristics and relative ease of manufacture as compared with certain other high-brightness gyricon displays.Type: GrantFiled: October 30, 1997Date of Patent: August 6, 2002Assignee: Xerox CorporationInventors: Nicholas K. Sheridon, Joseph M. Crowley
-
Patent number: 6419335Abstract: An electronic drive system applies a drive signal to an electrostatically actuated device such that a resulting electric field has a constant force. In various exemplary embodiments, the electronic drive system applies a drive signal to an electrostatically actuated fluid ejector that has a piston and a faceplate including a nozzle hole. A dielectric fluid to be ejected is supplied between the piston and the faceplate. The drive signal is applied to one of the piston and the faceplate. The drive signal generates an electric field across the fluid between the piston and the faceplate. The electric field causes the piston to be electrostatically attracted towards the faceplate so that a jet or drop of fluid is ejected through the nozzle hole of the faceplate. According to exemplary embodiments, the drive signal is from a constant current source or is reduced over the course of its lifetime.Type: GrantFiled: November 24, 2000Date of Patent: July 16, 2002Assignee: Xerox CorporationInventors: Arthur M. Gooray, George J. Roller, Joseph M. Crowley, Paul C. Galambos, Frank J. Peter, Kevin R. Zavadil, Richard C. Givler, William M. Lindenfelser
-
Patent number: 6416169Abstract: A piston structure is movably mounted within a fluid chamber. Movement of the piston structure towards a faceplate causes a portion of the fluid between the piston and the faceplate to be forced out of the nozzle hole in the faceplate, forming a drop or jet of the fluid. Viscous forces that are generated by the flow of fluid along a working surface of the piston structure toward and away from the nozzle hole generate a force that resists the movement of the piston structure. This resistance force tends to slow the piston motion, and prevents the piston from contacting the faceplate. In various embodiments, the fluid chamber is defined by a cylinder structure. The piston structure moves within the cylinder structure. The cylinder structure and the faceplate define the fluid chamber. The cylinder structure and the piston structure are designed to cooperate so that the movement of the piston structure within the cylinder structure ejects fluid according to various design criteria.Type: GrantFiled: November 24, 2000Date of Patent: July 9, 2002Assignee: Xerox CorporationInventors: Arthur M. Gooray, George J. Roller, Joseph M. Crowley, Paul C. Galambos, Frank J. Peter, Kevin R. Zavadil, Richard C. Givler
-
Publication number: 20020084877Abstract: A bi-chromal ball production apparatus and method where the bi-chromal ball material is fed from opposite sides of the disk, reconfiguring the internal geometry of the apparatus, and precisely configuring the bi-chromal ball material feeding slit. The bi-chromal ball production apparatus has a disk that rotates, a first supply structure that supplies a first bi-chromal ball material to the disk from a first direction, a second supply structure tube that supplies a second bi-chromal ball material to the disk from a second direction and a motor that rotates the disk. The bi-chromal ball production apparatus includes a first reservoir and a first slit defined by the disk and a top body, a second reservoir and a second slit defined by the disk and a bottom body. An inner surface of each of the first and second reservoir is parabola shaped.Type: ApplicationFiled: December 28, 2000Publication date: July 4, 2002Inventors: Dennis Martell, Nicolas K. Sheridan, Joseph M. Crowley, Matthew E. Howard, Michelle Ann Remus
-
Patent number: 6409311Abstract: A bi-directional fluid ejector according to the systems and methods of this invention operates on the principle of electrostatic attraction. In various exemplary embodiments, the fluid ejector includes a sealed dual diaphragm arrangement, an electrode arrangement that is parallel and opposite to the sealed diaphragms, and a structure which contains the fluid to be ejected. A diaphragm chamber containing a relatively incompressible fluid is situated behind, and is sealed by, the diaphragms. At least one nozzle hole is formed in a faceplate of the ejector over one of the diaphragms. A drive signal is applied to at least one electrode of the electrode arrangement to generate an electrostatic field between the electrode and a first one of the diaphragms. The first diaphragm is attracted towards the electrode by an electrostatic force into a deformed shape due to the electrostatic field. Upon deforming, pressure is transmitted to a second one of the sealed diaphragms.Type: GrantFiled: November 24, 2000Date of Patent: June 25, 2002Assignee: Xerox CorporationInventors: Arthur M. Gooray, George J. Roller, Joseph M. Crowley, Paul C. Galambos, Frank J. Peter, Kevin R. Zavadil, Richard C. Givler
-
Patent number: 6406130Abstract: A fluid ejection system according to this invention operates on the principle of electrostatic or magnetic attraction. In various exemplary embodiments, the fluid ejection system includes a sealed diaphragm arrangement having at least one diaphragm portion and a diaphragm chamber defined at least partially by the at least one diaphragm portion, a nozzle hole located over the at least one diaphragm portion, an ejection chamber defined between the nozzle hole and the least one diaphragm portion and a secondary dielectric fluid reservoir containing a secondary dielectric fluid. The ejection chamber receives a primary fluid to be ejected. The secondary dielectric fluid reservoir is in fluid communication with the diaphragm chamber to supply the secondary dielectric fluid to the diaphragm chamber. In various exemplary embodiments, the secondary dielectric fluid is a liquid, a substantially incompressible fluid, and/or a high performance dielectric fluid having a dielectric constant greater than 1.Type: GrantFiled: February 20, 2001Date of Patent: June 18, 2002Assignee: Xerox CorporationInventors: Arthur M. Gooray, George J. Roller, Joseph M. Crowley, Paul C. Galambos, Frank J. Peter, Kevin R. Zavadil, Richard C. Givler, Leonard M. Carreira
-
Patent number: 6367915Abstract: An electrostatic microelectromechanical system (MEMS) based fluid ejector comprises a movable piston structure and a stationary faceplate. A fluid chamber is defined between the piston structure and a substrate. The piston structure 110 may be resiliently mounted on the substrate by one or more spring elements. A fluid to be ejected is supplied in the fluid chamber from a fluid reservoir through a fluid refill hole formed in the substrate. The faceplate includes a nozzle hole through which a fluid jet or drop is ejected. In various exemplary embodiments, the piston structure moves towards the faceplate by electrostatic attraction between the piston structure and the faceplate. As a result of the movement of the piston structure, a portion of the fluid between the piston structure and the faceplate is forced out of the nozzle hole, forming a jet or drop of the fluid.Type: GrantFiled: November 28, 2000Date of Patent: April 9, 2002Assignee: Xerox CorporationInventors: Arthur M. Gooray, George J. Roller, Joseph M. Crowley, Paul C. Galambos, Frank J. Peter, Kevin R. Zavadil, Richard C. Givler
-
Patent number: 6350015Abstract: The systems and methods of the present invention operate by magnetically driving a fluid ejector. In various exemplary embodiments, a primary coil and a secondary coil are situated in the ejector. The ejector has a movable piston usable to eject fluid through a nozzle hole. The piston may be resiliently mounted and biased to an at-rest position. A drive signal is applied to cause current to flow in the primary coil. The current flow generates a magnetic field that induces a current in the secondary coil. Either the primary coil or the secondary coil or associated with the piston and the other is associated with a fixed structure of the ejector. As a result, a magnetic force is generated that pushes the piston either toward a faceplate so that a drop of fluid is ejected through the nozzle hole in the faceplate or away from the faceplate so that fluid fills in a fluid chamber between the piston and the faceplate.Type: GrantFiled: November 24, 2000Date of Patent: February 26, 2002Assignee: Xerox CorporationInventors: Arthur M. Gooray, George J. Roller, Joseph M. Crowley, Jr., Paul C. Galambos, Frank J. Peter, Kevin R. Zavadil, Richard C. Givler, D. Russell Humphreys, Jeffry J. Sniegowski
-
Publication number: 20020015831Abstract: A gyricon or twisting-particle display based on nonspheroidal (e.g., substantially cylindrical) optically anisotropic particles disposed in a substrate. The particles can be either bichromal or polychromal cylinders, preferably aligned parallel to one another and packed close together in a monolayer. A rotatable disposition of each particle is achievable while the particle is thus disposed in the substrate; for example, the particles can already be rotatable in the substrate, or can be rendered rotatable in the substrate by a nondestructive operation performed on the substrate. In particular, the substrate can be made up of an elastomer that is expanded by application of a fluid thereto so as to render the particles rotatable therein. A particle, when in its rotatable disposition, is not attached to the substrate. The close-packed monolayer configuration of particles provides excellent brightness characteristics and relative ease of manufacture as compared with certain other high-brightness gyricon displays.Type: ApplicationFiled: October 2, 2001Publication date: February 7, 2002Applicant: Xerox CorporationInventors: Nicholas K. Sheridon, Joseph M. Crowley
-
Patent number: 6055091Abstract: A gyricon or twisting-particle display based on nonspheroidal (e.g., substantially cylindrical) optically anisotropic particles disposed in a substrate. The particles can be bichromal cylinders, preferably aligned parallel to one another and packed close together in a monolayer. A rotatable disposition of each particle is achievable while the particle is thus disposed in the substrate; for example, the particles can already be rotatable in the substrate, or can be rendered rotatable in the substrate by a nondestructive operation performed on the substrate. In particular, the substrate can be made up of an elastomer that is expanded by application of a fluid thereto so as to render the particles rotatable therein. A particle, when in its rotatable disposition, is not attached to the substrate. The close-packed monolayer configuration of particles provides excellent brightness characteristics and relative ease of manufacture as compared with certain other high-brightness gyricon displays.Type: GrantFiled: September 13, 1996Date of Patent: April 25, 2000Assignee: Xerox CorporationInventors: Nicholas K. Sheridon, Joseph M. Crowley