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1. 发明授权

US6005918A X-ray tube window heat shield 失效
标题翻译： X射线管窗隔热罩
公开(公告)号：US6005918A
公开(公告)日：1999-12-21
申请号：US994637
申请日：1997-12-19
申请人： Jason P. Harris , Gerald J. Carlson , Lester D. Miller
发明人： Jason P. Harris , Gerald J. Carlson , Lester D. Miller
IPC分类号： G21K5/00 , H01J35/00 , H01J35/18 , H05G1/00
CPC分类号： H01J35/18 , H01J2235/168
摘要： An x-ray tube includes an envelope defining an evacuated chamber and having a window transmissive to x-rays. An anode assembly and a cathode assembly operate within the envelope to produce x-rays which travel through the window transmissive to x-rays towards a patient or subject under examination. A shield transmissive to x-rays is coupled to the envelope and positioned such that x-rays traveling through the window transmissive to x-rays must first travel through the shield. The shield prevents substantially all secondary electrons created during the production of x-rays from coming into contact with the window transmissive to x-rays thereby preventing excessive heating of the window transmissive to x-rays. An electrode defined by the envelope in a region proximate the window transmissive to x-rays may additionally or alternatively be used to prevent secondary electrons from reaching the window transmissive to x-rays.
摘要翻译： X射线管包括限定真空室并具有透射X射线的窗口的外壳。阳极组件和阴极组件在外壳内操作以产生X射线，X射线穿过透射X射线的窗口朝向被检查的患者或受试者。透射到X射线的屏蔽件耦合到外壳并定位成使得穿过透过窗口的窗口的x射线必须首先穿过屏蔽件。屏蔽件可防止在x射线产生期间产生的所有二次电子与透射X射线的窗口接触，从而防止透射X射线的窗口的过度加热。由透射到x射线的靠近窗口的区域中的包络限定的电极可以附加地或替代地用于防止二次电子到达透射X射线的窗口。

2. 发明授权

US5978447A X-ray tube straddle bearing assembly 失效
标题翻译： X射线管跨越轴承组件
公开(公告)号：US5978447A
公开(公告)日：1999-11-02
申请号：US967475
申请日：1997-11-11
申请人： Gerald J. Carlson , Jason P. Harris
发明人： Gerald J. Carlson , Jason P. Harris
IPC分类号： H01J35/10
CPC分类号： H01J35/101 , H01J2235/1046
摘要： A rotating assembly 79 includes an anode assembly 55 coupled to a shaft 70 and a rotor 75 including a rotor body 77. The anode assembly 55 includes an elongated neck portion 58 and is rotated via the shaft 70 about an axis of rotation 65 in an x-ray tube 12. The shaft 70 is mounted by a straddle bearing assembly 68 having a bearing housing 100. The bearing housing 100 includes a first elongated portion 101 and second elongated portion 102, and a base portion 103. The first elongated portion 101 and the second elongated portion 102 each pass through a center of mass C of the rotating assembly 79 and define an cooling duct 119 for removing heat from the anode assembly 55 during operations. A first bearing 90a and a second bearing 90b are disposed in the bearing housing 100 on opposite sides of the center of mass C of the rotating assembly 79. The first bearing 90a and the second bearing 90b are received between inner races 82a, 82b defined by the shaft 70 and outer races 92a, 92b defined by an outer bearing member 94 adjacent the second elongated portion 102. The second bearing 90b is positioned such that it is always in a closer thermal conductive path to a peripheral edge of the anode assembly 55 than the first bearing 90a regardless of an amount of load of the rotating assembly 79 supported by the first or second bearing.
摘要翻译：旋转组件79包括耦合到轴70的阳极组件55和包括转子体77的转子75.阳极组件55包括细长的颈部部分58，并且经由轴70绕x轴旋转的轴线65旋转轴70由具有轴承壳体100的跨越轴承组件68安装。轴承壳体100包括第一细长部分101和第二细长部分102以及基部103.第一细长部分101和第二细长部分102各自穿过旋转组件79的质心C并且限定了用于在操作期间从阳极组件55移除热量的冷却管道119。第一轴承90a和第二轴承90b在旋转组件79的质心C的相对侧上布置在轴承壳体100中。第一轴承90a和第二轴承90b被接收在由内部轴承90a和82b限定的内圈82a，82b之间轴70和由邻近第二细长部分102的外部轴承部件94限定的外部轴承92a，92b。第二轴承90b被定位成使得其总是处于比阳极组件55的周边边缘更靠近的导热路径，第一轴承90a，而不管由第一或第二轴承支撑的旋转组件79的负载量。

3. 发明授权

US06295338B1 Oil cooled bearing assembly 失效
标题翻译：油冷轴承总成
公开(公告)号：US06295338B1
公开(公告)日：2001-09-25
申请号：US09428795
申请日：1999-10-28
申请人： Daniel E. Kuzniar , Jason P. Harris , Gerald J. Carlson
发明人： Daniel E. Kuzniar , Jason P. Harris , Gerald J. Carlson
IPC分类号： H01J3510
CPC分类号： H01J35/101 , H01J2235/1046 , H01J2235/1053 , H01J2235/1208
摘要： An x-ray tube (20) comprising a cathode (23) and an anode (24) in operative relationship with the cathode (23). The anode (24) is mounted on a stem (32). The x-ray tube includes at least one bearing (58) rotatably receiving the stem (32). The at least one bearing (58) has an outer bearing race (66) in an outer race member, an inner bearing race (62) and a plurality of bearing members (64) operatively disposed between the inner and outer bearing races. The x-ray tube (20) also includes an evacuated envelope (78) which encloses the tube components and receives the outer race member of the at least one bearing (58) in thermally conductive contact along an inner surface (79).
摘要翻译：一种包括与阴极（23）有效关系的阴极（23）和阳极（24）的X射线管（20）。阳极（24）安装在杆（32）上。 X射线管包括至少一个可旋转地接收杆（32）的轴承（58）。所述至少一个轴承（58）在外座圈构件中具有外轴承座（66），内轴承座（62）和可操作地设置在所述内轴承座和所述外轴承座之间的多个轴承构件（64）。 X射线管（20）还包括抽真空的外壳（78），其包围管部件并且沿着内表面（79）以导热接触的方式接纳至少一个轴承（58）的外座圈部件。

4. 发明授权

US06570962B1 X-ray tube envelope with integral corona shield 失效
标题翻译：具有整体电晕屏蔽的X射线管封套
公开(公告)号：US06570962B1
公开(公告)日：2003-05-27
申请号：US10060421
申请日：2002-01-30
申请人： Mark S. Maska , Jason P. Harris , Todd R. Bittner
发明人： Mark S. Maska , Jason P. Harris , Todd R. Bittner
IPC分类号： H01J3510
CPC分类号： H01J35/16
摘要： An x-ray tube comprising a first electrode and a second electrode. The first and second electrodes are located in operative relationship with one another to generate x-rays when the electrodes are energized at their respective operating potential. An evacuated envelope encloses the first and second electrodes. The evacuated envelope includes a first envelope wall portion, a second envelope wall portion and an envelope weld member comprising an electrical conductor. The envelope weld member is in electrical communication so as to be at operating potential of one of the first and second electrodes when the x-ray tube is energized. The envelope weld member is adapted for vacuum tight joining to the first envelope wall portion and to the second envelope wall portion. The envelope weld member has an integral corona shield portion.
摘要翻译：一种包括第一电极和第二电极的X射线管。当电极在其各自的工作电位被通电时，第一和第二电极彼此处于操作关系，以产生X射线。抽真空的信封包围第一和第二电极。真空外壳包括第一封套壁部分，第二封套壁部分和包括电导体的包络焊接部件。当X射线管通电时，信封焊接构件电连通，以便处于第一和第二电极中的一个的操作电位。信封焊接部件适于与第一封套壁部分和第二封套壁部分进行真空密封接合。信封焊接部件具有整体电晕屏蔽部分。

5. 发明授权

US06480572B2 Dual filament, electrostatically controlled focal spot for x-ray tubes 有权
公开(公告)号：US06480572B2
公开(公告)日：2002-11-12
申请号：US09802517
申请日：2001-03-09
申请人： Jason P. Harris , Salvatore Perno
发明人： Jason P. Harris , Salvatore Perno
IPC分类号： H01J3506
CPC分类号： H01J35/06 , H01J2235/068
摘要： A dual filament x-ray tube assembly (16) includes an evacuated envelope (52) having an anode (54) disposed at a first end of the evacuated envelope (52) and a cathode assembly (62) disposed at a second end of the evacuated envelope (52). The cathode assembly includes a variable-length filament assembly (72, 74; 100) which emits electron beams for impingement on the anode (54) at focal spots having varying lengths. The cathode assembly (62) further includes a cathode cup (64, 66, 68; 110, 112) which is subdivided into a plurality of electrically insulated deflection electrodes (64, 66, 68; 110, 112). A filament select circuit (80) selectively and individually heats a portion of the variable-length filament assembly (72, 74). Electron beams emitted from the filament assembly (72, 74) are electrostatically focused and controlled by applying potentials to different ones of the deflection electrodes (64, 66, 68; 110, 112). The x-ray tube assembly (16) provides longer focal spots for thick-slice scanning applications and shorter focal spots for thin-slice scanning applications along with the benefit of electrostatic focusing and control.

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