Did You Know...
...that after Parker Brothers executives turned down the game of Monopoly because it had "52 fundamental errors" (including taking too long to play), a copy of the game wound up in the home of the company president who stayed up until 1 a.m. to finish playing it? He was so impressed by the game that the next day he wrote to inventor Charles Darrow and offered to buy it!
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| Number | Title | Issue Date |
| 8111810 | Method for producing highly constrained ultrasound images A highly constrained image processing method is used to improve the quality, including spatial resolution and signal-to-noise ratio (SNR), of ultrasound image frames. Ultrasound image frames are accumulated to form a composite image that contains a priori informatio... | 02/07/2012 |
| 8073109 | Method and system for pet image reconstruction using a surogate image A method and system for use in positron emission tomography, wherein a first processor element (234) is configured to reconstruct a plurality of positron annihilation events detected during a positron emission tomography scan using a list-based reconstruction... | 12/06/2011 |
| 8054943 | Magnetic coupler drive for x-ray tube anode rotation An x-ray tube includes a housing enclosing a vacuum chamber, a cathode positioned within the vacuum chamber configured to emit electrons, and an anode positioned within the vacuum chamber to receive the electrons emitted from the cathode and generate a beam of x-ray... | 11/08/2011 |
| 7995708 | X-ray tube bearing shaft and hub In one example, an assembly comprises a hub and a shaft. The hub defines an axis of rotation and includes first and second flanges that at least partly define a substantially cylindrical hub opening. The shaft is connected to the hub and includes a first end and a s... | 08/09/2011 |
| 7852988 | High flux X-ray target and assembly An X-ray tube anode assembly and an X-ray tube assembly are disclosed that include an X-ray target and a drive assembly configured to provide an oscillatory motion to the X-ray target. The drive assembly is configured to provide an oscillatory motion to the target a... | 12/14/2010 |
| 7412032 | X-ray emitter, liquid-metal anode for an x-ray source and method for operating a magnetohydrodynamic pump for the same The invention relates to a method for operating a magnetohydrodynamic pump 5 for a liquid-metal anode 1 of an X-ray source. It is provided according to the invention that it can be operated in at least two modes, wherein the first mode is a thaw... | 08/12/2008 |
| 7343002 | Bearing assembly A bearing assembly suitable for use in conjunction with x-ray device having a rotating target anode and electron source disposed in an evacuated enclosure. The bearing assembly includes a shaft having a rotor hub to which the anode is mounted. The shaft cooperates w... | 03/11/2008 |
| 7336766 | X-ray system and its driving method An X-ray apparatus includes a rotary anode X-ray tube, a stator coil, and a drive-power-supply device. The rotary anode X-ray tube has an anode target arranged in a vacuum envelope, a rotary body coupled to the anode target and configured to rotate together with the... | 02/26/2008 |
| 7203281 | Encapsulated stator assembly for an x-ray tube An encapsulated stator assembly for use in stator-driven devices is disclosed. The encapsulated stator assembly includes a stator and a covering portion that envelops the stator. The purpose of the covering portion is multi-fold: first, the covering portion serves a... | 04/10/2007 |
| 7197114 | X-rays emitter and X-ray apparatus and method of manufacturing an X-ray emitter An X-ray emitter and an X-ray apparatus and method of manufacturing an x-ray emitter. The emitter has an anode, a cathode, and a vacuum evacuated body in which the anode and the cathode are placed. The body has an opening and a high-voltage connector placed in the o... | 03/27/2007 |
| 7190765 | Bearing temperature and focal spot position controlled anode for a CT system An anode assembly (50) includes a thermally conductive bearing encasement (52) covering a portion of a bearing (64). An anode (56) rotates on the bearing (64) and has a target (58) with an associated focal spot (60). ... | 03/13/2007 |
| 7141903 | Low magnetic signature motor system A low magnetic signature motor system (1) comprises a plurality of electric motors (2), a first shield (9) and a second shield (13). The electric motors are arranged with their associated magnetic moments (6, 7) forming a closed lo... | 11/28/2006 |
| 7127034 | Composite stator A composite stator is disclosed for use with rotationally driven apparatus, particularly high voltage x-ray tubes. The composite stator generally comprises a core, a plurality of motor windings, and a retaining band. The core is comprised of two or more core section... | 10/24/2006 |
| 7113568 | Liquid cooled bearing housing with greased lubricated rotating anode bearings for an x-ray tube A rotating anode bearing housing includes an x-ray tube frame (106) that has a vacuum chamber (108). An anode (110) resides within the vacuum chamber (108) and rotates on a shaft (114) via a bearing (117). The bearing (11... | 09/26/2006 |
| 7095821 | Non-rusting and non-particulating imaging X-ray tube rotor assembly An rotor assembly (30) for an imaging X-ray tube (32) is provided. The imaging X-ray tube rotor assembly (30) includes at least partially a magnetic non-corrosive material. A method of producing the imaging tube X-ray rotor assembly (30) ... | 08/22/2006 |
| 7068751 | System and method of determining a center of mass of an imaging subject for x-ray flux management control A system and method of diagnostic imaging is provided that includes positioning a subject in a scanning bay, comparing a center of mass of the subject to a reference point, and repositioning the subject in the scanning bay to reduce a difference in position between ... | 06/27/2006 |
| 7006602 | X-ray tube energy-absorbing apparatus An energy-absorbing device (78) for an imaging tube (18) includes an energy-absorbing body (82). The energy-absorbing body (82) is fluidically coupled to a housing (60) of the imaging tube (18) and absorbs the kinetic energy... | 02/28/2006 |
| 6888922 | Filament circuit resistance adjusting apparatus technical field A filament circuit resistance adjusting apparatus (36), for a filament circuit (38) having a filament (50) with a first resistance is provided. The filament circuit resistance adjusting apparatus (36) includes a first resistor (70)... | 05/03/2005 |
| 6873683 | Axial flux motor driven anode target for X-ray tube An X-ray tube comprises a cathode, an anode target assembly and an axial flux motor having a rotor and a stator. The stator is positioned along a transverse axis parallel to the rotor axis. The rotor and the stator are configured to be coupled to the anode target as... | 03/29/2005 |
| 6670625 | Method and apparatus for correcting multipole aberrations of an electron beam in an EBT scanner A method and apparatus are disclosed for reducing variation in a spot size of an electron beam at a target due to multipole aberrations in an electron beam tomography (EBT) scanner. A magnitude of a DC voltage applied to a positive ion electrode (PIE) wit... | 12/30/2003 |
| 6570960 | High voltage isolated rotor drive for rotating anode x-ray tube An x-ray tube (20) includes an evacuated envelope (26). Mounted within the evacuated envelope are a cathode (23) and a rotatbly supported anode (30). A rotor (70) is included for rotatably driving the anode. The rotor (70) is electrically insulated from t... | 05/27/2003 |
| 6487273 | X-ray tube having an integral housing assembly The present invention is directed to a radiographic apparatus that utilizes a single integral housing for providing an evacuated envelope for an anode and cathode assembly. The integral housing provides sufficient radiation blocking and heat transfer char... | 11/26/2002 |
| 6480571 | Drive assembly for an x-ray tube having a rotating anode An anode drive assembly for use in an x-ray tube having a rotating anode is disclosed. The anode drive assembly is comprised of a bearing assembly that provides rotational support to a rotor assembly. The rotor assembly is connected to the rotating anode,... | 11/12/2002 |
| 6456692 | High emissive coatings on x-ray tube components An x-ray tube having one or more components, such as the rotor, that include a coating of relatively high emissivity. The coating, a metal oxide composition for example, is selectively applied to desired portions of the component by plasma spray or simila... | 09/24/2002 |
| 6385293 | Thermally equalized X-ray tube bearing A high energy x-ray tube includes an evacuated chamber (12) containing a rotor (34) which rotates an anode (10) in the path of a stream of electrons (A) to generate an x-ray beam (B) and heat. Heat is carried away from the anode to a bearing shaft (54) wh... | 05/07/2002 |
| 6377658 | Seal for liquid metal bearing assembly The present invention provides, in one embodiment, a bearing assembly consisting of a rotatable shaft and a stator coaxially aligned. The stator has at least one circumferential protrusion that contains respective segments that extend radially from the st... | 04/23/2002 |
| 6373921 | X-ray unit including electromagnetic shield An X-ray unit includes an X-ray tube including a rotating anode coupled to a rotor and a metal frame enclosing the rotating anode and the rotor. A motor, including the rotor of the X-ray tube, and a stator are situated outside the metal frame while an ele... | 04/16/2002 |
| 6330304 | Vertical rotor braze joint with retention chamfer The present invention relates to a rotor shaft and rotor body assembly in an x-ray device, and it method of manufacture, that resists the formation of cracks in the braze joint due to the elimination of horizontal shear planes therein. The inventive struc... | 12/11/2001 |
| 6275567 | Rotary-anode X-ray tube provided with a hydrodynamic sleeve bearing The invention relates to a rotary-anode X-ray tube which includes a sleeve bearing which is composed of an inner and an outer bearing segment, the outer bearing segment including intermediate pieces and a holder on which the intermediate pieces bear so as... | 08/14/2001 |
| 6208711 | Method and apparatus for clearing ions in a scanning electron beam computed tomographic system using a single potential power source In a scanning electron beam CT system, a positive ion clearing electrode system is disposed within the CT system solenoid coil, and is operated from a single power source. Mounted coaxially about the electron beam, preferably the electrode system includes... | 03/27/2001 |
| 6154521 | Gyrating anode x-ray tube An x-ray tube (10) includes an anode (14) connected to a mechanical drive (36). The mechanical drive oscillates the anode in a gyrating motion relative to a body of the x-ray tube. The mechanical drive is operatively connected to the anode via a bellows a... | 11/28/2000 |
| 6144720 | Iron oxide coating for x-ray tube rotors A high energy x-ray tube includes an evacuated chamber (12) containing a rotor (34) which rotates an anode (10) in the path of a stream of electrons (A) to generate an x-ray beam (B) and heat. The rotor includes an armature (36) which rotates around a sta... | 11/07/2000 |
| 6141401 | Drive device for a rotary anode of an X-ray tube, and method of controlling the drive device The invention relates to a drive device for a rotary anode of an X-ray tube, including an induction motor (13) whereto an alternating voltage can be applied by means of an inverter (20), and also including a control unit (22) for controlling the inverter ... | 10/31/2000 |
| 5883487 | Method and apparatus for determining the speed of rotation of an AC motor A speed control apparatus for determining and controlling the speed of rotation of a rotor in an AC motor. The motor includes a stator having main and auxiliary windings. Main and auxiliary winding controllers control the operational input signals supplie... | 03/16/1999 |
| 5838762 | Rotating anode for x-ray tube using interference fit A method for assembling a rotating X-ray tube structure ensures balance retention during the life of the tube. The X-ray tube structure has a cathode for emitting electrons, and a rotor and a bearing assembly for facilitating rotation of an anode. At leas... | 11/17/1998 |
| 5781609 | Drive device for a rotary anode of an x-ray tube The invention relates to a drive device for a rotary anode of an X-ray tube having a drive motor with a stator (10) and a rotor (15; 21) which drives the rotary anode, the stator (10) and the rotor (15; 21) being separated by a gap and the stator (10) hav... | 07/14/1998 |
| 5774625 | Arrangement for monitoring the rotational speed of a rotary-anode drive motor of x-ray The invention relates to an X-ray apparatus, comprising a rotary-anode X-ray tube, a device for monitoring the rotational speed of a rotary-anode drive motor of the X-ray tube, a sensor circuit for determining an angle signal which is dependent on the pha... | 06/30/1998 |
| 5757885 | Rotary target driven by cooling fluid flow for medical linac and intense beam linac A linear accelerator x-ray target assembly including an electron beam which contacts an x-ray target and generates x-rays. The target is mounted such that it can rotate freely about its axis. The target has a contoured axially outer edge. Fluid flow impin... | 05/26/1998 |
| 5737387 | Cooling for a rotating anode X-ray tube A method and apparatus for cooling a rotating anode X-ray tube. An electromagnetic motor is provided to rotate an X-ray anode with cooling passages in the anode. These cooling passages are coupled to a cooling structure located adjacent the electromagneti... | 04/07/1998 |
| 5696804 | X-ray tomographic apparatus In an X-ray tomographic apparatus, while rotating a gantry rotary section around a region where an object to be photographed is placed, the anode target of an X-ray tube is rotated at a predetermined high rotation rate and X-rays are emitted from the anod... | 12/09/1997 |
