The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 04, 2012
Filed:
Jan. 31, 2008
Takanobu Akiyama, Numazu, JP;
Takanobu Akiyama, Numazu, JP;
Toshiba Kikai Kabushiki Kaisha, Tokyo, JP;
Abstract
There is provided a roll machining apparatus for machining the surface of a roll, which can accurately support a roll by hydrostatic bearings while absorbing thermal expansion of the roll in the length direction, thus enhancing the machining precision. The roll machining apparatus can include a first hydrostatic radial bearing for receiving the radial load of a first spindle and rotatably supporting the first spindle, a hydrostatic thrust bearing for receiving the thrust load of the first spindle and limiting axial movement of the first spindle, a second hydrostatic radial bearing for receiving the radial load of a second spindle and rotatably supporting the second spindle, and a floating thrust having a thrust bearing for receiving the thrust load of the second spindle. The floating thrust selectively limits and permits axial movement of the thrust bearing.