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Patent Searching and Data


Title:
MEMBER FOR PUMPS AND PLUNGER
Document Type and Number:
WIPO Patent Application WO/2019/163782
Kind Code:
A1
Abstract:
A member for pumps according to the present disclosure is used in a dual pump for supplying and discharging dialysis fluid and is made from aluminum oxide-based ceramics. The aluminum oxide-based ceramics contain calcium, and the calcium content in terms of oxides thereof is at most 0.04% by mass. A plunger according to the present disclosure is a column body having a first surface, a second surface opposite to the first surface, and an outer circumferential surface located between the first surface and the second surface. The outer circumferential surface is provided with a groove section, and the groove section is provided with: a first groove having a first inner lateral surface and a first bottom surface; and a second groove that is recessed from the first bottom surface of the first groove section, and that has a second inner lateral surface and a second bottom surface. The maximum grain size of crystal particles in the second inner lateral surface of the second groove is less than the maximum grain size of the crystal particles on the second bottom surface of the second groove section.

Inventors:
KOBAYASHI, Kazuki (6 Takeda Tobadono-cho, Fushimi-ku, Kyoto-sh, Kyoto 01, 〒6128501, JP)
YAMABE, Kunihiro (6 Takeda Tobadono-cho, Fushimi-ku, Kyoto-sh, Kyoto 01, 〒6128501, JP)
Application Number:
JP2019/006117
Publication Date:
August 29, 2019
Filing Date:
February 19, 2019
Export Citation:
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Assignee:
KYOCERA CORPORATION (6 Takeda Tobadono-cho, Fushimi-ku Kyoto-sh, Kyoto 01, 〒6128501, JP)
International Classes:
F04B9/02; F04B15/00; F04B53/00
Foreign References:
JP2004076602A2004-03-11
JP2004352573A2004-12-16
JPH0930858A1997-02-04
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