SEALING MEMBER FOR FERROFLUID SEAL AND METHOD OF PRODUCING THE SAME

The present invention relates to an annular sealing member (7) arranged so as to surround the periphery of a working member such as a shaft (10). This sealing member (7), is produced by sticking a sheet (1) of elastic magnet to pole piece-constructing sheets (2, 2) and punching the resulting assembl...

Full description

Saved in:
Bibliographic Details
Main Author ISHIKAWA; RYUHEI
Format Patent
LanguageEnglish
Published 01.10.1991
Subjects
BASIC ELECTRIC ELEMENTS
BLASTING
CYLINDERS
ELECTRICITY
ENGINEERING ELEMENTS AND UNITS
GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS
HEATING
INDUCTANCES
LIGHTING
MAGNETS
MECHANICAL ENGINEERING
PISTONS
SEALINGS
SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
THERMAL INSULATION IN GENERAL
TRANSFORMERS
WEAPONS
Online AccessGet full text

Cover

More Information
Summary:The present invention relates to an annular sealing member (7) arranged so as to surround the periphery of a working member such as a shaft (10). This sealing member (7), is produced by sticking a sheet (1) of elastic magnet to pole piece-constructing sheets (2, 2) and punching the resulting assembly. The annular portion of said sheet (1) of elastic magnet is pressed to be contracted in the direction of thickness and stretched in the radial direction by said punching. As a result, the circumferential portion of the above described annular magnet (8) is dislocated so as to be sunk from the periphery of said annular pole pieces (9, 9). Accordingly, the dimensional accuracy of inner and outer circumferences of the sealing member (7) is improved.
Bibliography:Application Number: US19890444171