Rotary expansible chamber devices – Moving cylinder – Rotating
Reexamination Certificate
2011-04-26
2011-04-26
Trieu, Theresa (Department: 3748)
Rotary expansible chamber devices
Moving cylinder
Rotating
C418S166000, C384S513000, C384S490000
Reexamination Certificate
active
07931454
ABSTRACT:
A bearing is located with movement of an outer race in the longitudinal direction of a drive shaft being restricted, and the drive shaft is fixed to an inner race with the press fit, so that, it is possible to prevent the drive shaft from escaping. In addition, the inner race is longer than the outer race. Therefore, it is possible to obtain sufficient strength of the press fit of the drive shaft in the inner race while suppressing the size of the outer race (in other words, suppressing the size of the pump device). As a consequence, the size of the pump device can be suppressed while increasing reliability of the function for preventing the drive shaft from escaping.
REFERENCES:
patent: 2637605 (1953-05-01), Powers
patent: 3214224 (1965-10-01), Lash
patent: 4492539 (1985-01-01), Specht
patent: 4971525 (1990-11-01), Nakayoshi et al.
patent: 5509198 (1996-04-01), Takamizawa et al.
patent: 2007/0096550 (2007-05-01), Yamaguchi et al.
patent: A-2004-52988 (2004-02-01), None
Fuchida Takeshi
Ikai Hidemi
Sato Takashi
Shinkai Hiroyuki
Torii Shigeki
Advics Co., Ltd.
Posz Law Group , PLC
Trieu Theresa
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