Title:
PORTABLE ELECTRIC AIR PUMP
Document Type and Number:
Japanese Patent JP3802987
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a portable electric air pump where a piston ring does not separate from a ring groove.
SOLUTION: A piston 29b of a piston body 29 to which an O-ring 33 and a piston ring 34 are mounted is provided with a first land 29b2 formed on one side of a ring groove 29b1 and a second land 29b3 which has an outer diameter larger than that of the first land 29b2 and is formed on the other side of the ring groove 29b1.
Inventors:
Go Nonaka
Application Number:
JP22316398A
Publication Date:
August 02, 2006
Filing Date:
August 06, 1998
Export Citation:
Assignee:
Automotive Electric Industry Co., Ltd.
International Classes:
F04B39/00; F04B41/00; (IPC1-7): F04B41/00; F04B39/00
Attorney, Agent or Firm:
Katsuji Matsuda
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