Title:
MONOLITH PERMANENT MAGNET
Document Type and Number:
Japanese Patent JP2018178990
Kind Code:
A
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
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Inventors:
ADRIAN WIRTH
DANIEL SIEBEN
HERBERT STAMMLER
DANIEL SIEBEN
HERBERT STAMMLER
Application Number:
JP2017227380A
Publication Date:
November 15, 2018
Filing Date:
November 28, 2017
Export Citation:
Assignee:
PFEIFFER VACUUM GMBH
International Classes:
F04D19/04; F16C32/04; H01F7/02; H01F13/00
Domestic Patent References:
JP2005188735A | 2005-07-14 | |||
JP2017061920A | 2017-03-30 | |||
JP2015169211A | 2015-09-28 | |||
JP2017129143A | 2017-07-27 |
Attorney, Agent or Firm:
Mitsufumi Esaki
Blacksmith
Atsushi Shinohara
Shinsuke Nakamura
Blacksmith
Atsushi Shinohara
Shinsuke Nakamura