Patents by Inventor Michael F. Haw
Michael F. Haw 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: 6727480Abstract: A dissolution testing system comprises a vessel plate on which a plurality of vessels are mounted. Each vessel includes a lateral wall having an outer surface around which a plurality of flexible heater elements are attached. Each heater element includes a transparent surface area, a heat conductive element extending along the transparent surface area, a temperature sensing element extending along the transparent surface area, and an electrical contact element connected to the heat conductive element and the temperature sensing element. The heater element can have more than one heating zone, with at least one of the heating zones being selectively energizable. The transparent heater element allows unobstructed view into the interior of its vessel, and reduces the time required to achieve a stabilized set point temperature in the vessel. A heater control system communicates with each heat conductive element and each temperature sensing element through a corresponding one of the electrical contact elements.Type: GrantFiled: July 23, 2001Date of Patent: April 27, 2004Assignee: Varian, Inc.Inventors: C. J. Anthony Fernando, James E. Swon, Michael F. Haw
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Patent number: 6474182Abstract: Apparatus and methods for measuring the amount by which the centerline of a shaft disposed in a vessel is offset from the central vertical axis of the vessel, and for measuring the height of such shaft above the inside bottom of the vessel. Apparatus includes a shaft centerline offset measurement device, a shaft height measurement device, and a control/display console. Each measurement device includes a transducer or optical encoder for sensing a displaced position of a biased plunger to which a code strip is mounted. The devices may be combined into a single shaft offset and height measurement device. Improved methods include calculating shaft offset based on a plurality of readings from the transducer, and applying trigonometric relationships. The apparatus and methods are particularly useful in the verification of paddle or basket shafts utilized in dissolution testing stations, so that the dissolution testing protocol complies with government agency guidelines.Type: GrantFiled: April 4, 2001Date of Patent: November 5, 2002Assignee: Varian, Inc.Inventors: Gregory S. Duckett, C. J. Anthony Fernando, Michael F. Haw
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Patent number: 6434847Abstract: Apparatus and methods for measuring the amount by which the centerline of a shaft disposed in a vessel is offset from the central vertical axis of the vessel, and for measuring the height of such shaft above the inside bottom of the vessel. Apparatus includes a shaft centerline offset measurement device, a shaft height measurement device, and a control/display console. Each measurement device includes a transducer or optical encoder for sensing a displaced position of a biased plunger to which a code strip is mounted. The devices may be combined into a single shaft offset and height measurement device. Improved methods include calculating shaft offset based on a plurality of readings from the transducer, and applying trigonometric relationships. The apparatus and methods are particularly useful in the verification of paddle or basket shafts utilized in dissolution testing stations, so that the dissolution testing protocol complies with government agency guidelines.Type: GrantFiled: November 2, 1999Date of Patent: August 20, 2002Assignee: Varian, Inc.Inventors: Gregory S. Duckett, C. J. Anthony Fernando, Michael F. Haw
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Publication number: 20020014485Abstract: A dissolution testing system comprises a vessel plate on which a plurality of vessels are mounted. Each vessel includes a lateral wall having an outer surface around which a plurality of flexible heater elements are attached. Each heater element includes a transparent surface area, a heat conductive element extending along the transparent surface area, a temperature sensing element extending along the transparent surface area, and an electrical contact element connected to the heat conductive element and the temperature sensing element. The heater element can have more than one heating zone, with at least one of the heating zones being selectively energizable. The transparent heater element allows unobstructed view into the interior of its vessel, and reduces the time required to achieve a stabilized set point temperature in the vessel. A heater control system communicates with each heat conductive element and each temperature sensing element through a corresponding one of the electrical contact elements.Type: ApplicationFiled: July 23, 2001Publication date: February 7, 2002Inventors: C.J. Anthony Fernando, James E. Swon, Michael F. Haw
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Publication number: 20010052269Abstract: Apparatus and methods for measuring the amount by which the centerline of a shaft disposed in a vessel is offset from the central vertical axis of the vessel, and for measuring the height of such shaft above the inside bottom of the vessel. Apparatus includes a shaft centerline offset measurement device, a shaft height measurement device, and a control/display console. Each measurement device includes a transducer or optical encoder for sensing a displaced position of a biased plunger to which a code strip is mounted. The devices may be combined into a single shaft offset and height measurement device. Improved methods include calculating shaft offset based on a plurality of readings from the transducer, and applying trigonometric relationships. The apparatus and methods are particularly useful in the verification of paddle or basket shafts utilized in dissolution testing stations, so that the dissolution testing protocol complies with government agency guidelines.Type: ApplicationFiled: April 4, 2001Publication date: December 20, 2001Inventors: Gregory S. Duckett, C.J. Anthony Fernando, Michael F. Haw
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Patent number: 6303909Abstract: A dissolution testing system comprises a vessel plate on which a plurality of vessels are mounted. Each vessel includes a lateral wall having an outer surface around which a plurality of flexible heater elements are attached. Each heater element includes a transparent surface area, a heat conductive element extending along the transparent surface area, a temperature sensing element extending along the transparent surface area, and an electrical contact element connected to the heat conductive element and the temperature sensing element. The transparent heater element allows unobstructed view into the interior of its vessel, and reduces the time required to achieve a stabilized set point temperature in the vessel. A heater control system communicates with each heat conductive element and each temperature sensing element through a corresponding one of the electrical contact elements. The heater control system permits each vessel to be controlled independently of the other vessels.Type: GrantFiled: June 23, 2000Date of Patent: October 16, 2001Assignee: Varian, Inc.Inventors: C. J. Anthony Fernando, James E. Swon, Michael F. Haw
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Patent number: 5204537Abstract: A typical printing device has a document feeder, a printer, and a document transport mechanism for transporting documents from the document feeder to the printer. In accordance with the invention, there is provided a thickness measurer which measures the thickness of a document prior to the transport of the document to the printer, a controller which receives the thickness information and which provides a gap-adjustment signal, and an adjuster which receives the gap-adjustment signal and adjusts the gap accordingly.Type: GrantFiled: January 29, 1992Date of Patent: April 20, 1993Assignee: Recognition Equipment IncorporatedInventors: Richard I. Bennet, Guy H. Berthiaume, Michael F. Haw, Joseph G. Melber, Jr., Jimmie Neill
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Patent number: 5118209Abstract: A typical printing device has a document feeder, a printer, and a document transport mechanism for transporting documents from the document feeder to the printer. In accordance with the invention, there is provided a thickness measurer which measures the thickness of a document prior to the transport of the document to the printer, a controller which receives the thickness information and which provides a gap-adjustment signal, and an adjuster which receives the gap-adjustment signal and adjusts the gap accordingly.Type: GrantFiled: October 24, 1991Date of Patent: June 2, 1992Assignee: TransTechnology CorporationInventors: Richard I. Bennet, Guy H. Berthiaume, Michael F. Haw, Joseph G. Melber, Jr., Jimmie Neill