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Patent Searching and Data


Title:
モノリス式の永久磁石
Document Type and Number:
Japanese Patent JP6611780
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a monolith permanent magnet excellently suitable for a high-precision application field.SOLUTION: A permanent magnet of this invention especially relates to monolith permanent magnets (14, 14a, 14b) for a permanent magnet support part (10) of a vacuum pump, and has a longitudinal axis (L), and a plurality of portions (16, 16') arranged along the longitudinal direction and magnetized at least approximately in an axis direction, wherein magnetic properties are alternately opposite to each other. In the permanent magnet, a dimension and/or magnetic property in the axis direction of at least one magnetized portion (16) are different from a dimension and/or magnetic property in the axis direction of at least the other magnetized portion (16).SELECTED DRAWING: Figure 1

Inventors:
Adrien Wild
Darniere Sieben
Herbert Stammler
Application Number:
JP2017227380A
Publication Date:
November 27, 2019
Filing Date:
November 28, 2017
Export Citation:
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Assignee:
Pfeiffer Vacuum Game Behr
International Classes:
F04D19/04; F16C32/04; H01F7/02; H01F13/00
Domestic Patent References:
JP2005188735A
JP2017061920A
JP2015169211A
JP2017129143A
Attorney, Agent or Firm:
Mitsufumi Esaki
Blacksmith
Atsushi Shinohara
Shinsuke Nakamura