Title:
極低温液体ポンプ
Document Type and Number:
Japanese Patent JP4299912
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a pump capable of being assembled at ordinary temperature and usable at an ultra-low temperature without causing a seizure in a sliding part by forming a cylinder and a piston base material by use of the same material, subjecting the surface of the piston to a self-lubricating composite plating, and setting the space between the piston and the cylinder to a prescribed precision. SOLUTION: A liquid hydrogen pump has a suction opening 2 formed on the bottom of a bottomed cylindrical pump housing 1, and the upper part of the housing 1 is fixed to a liquid hydrogen storage vessel. A piston 10 fitted to a cylinder 11 within the housing 1 is reciprocated through a connection rod 15 by the operation of a pump driving mechanism arranged in the upper part of the housing 1. In this case, the circumferential surface of the piston 10 is nickeled by use of a suspension obtained by dispersing a material having self- lubricating function such as polytetrafluoroethylene or molybdenum disulfide in a metal matrix, and the plating layer is polished, whereby the clearance between the cylinder 11 and the piston 12 is set to 1-3 μm.
Inventors:
Yamane High School
Susumu Masaru
Makoto Matsumoto
Susumu Masaru
Makoto Matsumoto
Application Number:
JP8749899A
Publication Date:
July 22, 2009
Filing Date:
March 30, 1999
Export Citation:
Assignee:
Yamane High School
Susumu Masaru
Makoto Matsumoto
Iwatani Corporation
Ebara Yuji Light Co., Ltd.
Susumu Masaru
Makoto Matsumoto
Iwatani Corporation
Ebara Yuji Light Co., Ltd.
International Classes:
F04B7/06; F04B53/18; F04B15/08
Domestic Patent References:
| JP9280180A | ||||
| JP57056678A | ||||
| JP63036068A | ||||
| JP8177728A | ||||
| JP2074578U | ||||
| JP2080778U |
Attorney, Agent or Firm:
Shoji Suzue
Toshiyuki Kimura
Toshiyuki Kimura