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:
Feb. 19, 2002
Filed:
Jun. 12, 2000
Hitachi, Ltd., Tokyo, JP;
Abstract
For providing an electric rotating machine, with which can be maintained the rotational symmetry of the stator iron or steel sheets, as well as the symmetry of the magnetic circuit, without increasing of the weight of the stator, wherein an electric rotating machine comprising: a stator having a stator core being formed by fixing a laminated body of stator iron or steel sheets, and stator coils ; a rotor having a rotation shaft of; a frame for receiving the stator therein; and end brackets and having through bolt holes and outer attachment bolt holes , wherein the stator is fixed to the end brackets and by through bolts , and the electric rotating machine is installable onto an outside by means of outer attachment bolts, and the stator iron or steel sheet is in a shape being symmetric both sides and upside down with axes B -B and comprises a main body portion and and corner portions in which are formed through bolt holes , the through bolt holes are provided on the axes B -B of symmetry and on a circumference around the rotation shaft O of the rotor at an equal distance between them, and further a line connecting between the through bolt hole and the rotation shaft O of the rotor is shifted from a line connecting between the outer attachment bolt hole of the flange and the rotation shaft O of the rotor, by a predetermined angle &agr;.