X-ray or gamma ray systems or devices – Source – Electron tube
Reexamination Certificate
2005-09-06
2005-09-06
Church, Craig E. (Department: 2882)
X-ray or gamma ray systems or devices
Source
Electron tube
C378S125000
Reexamination Certificate
active
06940947
ABSTRACT:
An integrated bearing assembly is provided, comprising a bearing housing defining an axial cavity in which a shaft is disposed. The shaft is rotatably supported by at least two bearing sets. The axial cavity defines three regions, each having distinct diameters. A pair of first regions defines cavity diameters sufficient to receive the bearing sets. A pair of second regions defines cavity diameters such that a small gap is defined between the inner surface of the cavity and the shaft. The third region cooperates with the shaft to define a cylindrical volume containing a coolant. Wettable coatings are utilized in the cylindrical volume to allow free flow of, and maximum contact with, the coolant. Non-wettable coatings are provided in the second regions to contain the coolant. The second regions also function as bearing spacers, thus simplifying bearing assembly design, assembly, and performance.
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Bandy Steve G.
Humber David H.
Nishimoto Clifford K.
Virshup Gary F.
Church Craig E.
Varian Medical Systems Technologies, Inc.
Workman Nydegger
Yun Jurie
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