Power plants – Pressure fluid source and motor – Pulsator
Reexamination Certificate
2006-09-12
2006-09-12
Kershteyn, Igor (Department: 3745)
Power plants
Pressure fluid source and motor
Pulsator
C060S588000, C060S589000
Reexamination Certificate
active
07104059
ABSTRACT:
A master cylinder includes a primary cup received in a groove formed in the inner wall of the cylinder body. Projections are formed on a radially inner portion of the cup so as to protrude forwardly from the front end of the radially inner portion. The projections are adapted to be pressed against the front end wall of the cup-receiving groove and elastically deformed under a pressure difference produced between the front and rear ends of the cup when the piston is returned quickly, allowing the cup to advance in the cup-receiving groove. When the cup advances in the groove, a fluid passage is defined between a base portion of the cup and the rear end wall of the groove. Brake fluid from the reservoir flows through this fluid passage, through a gap formed between a radially outer portion of the cup and the radially outer wall of the groove when the radially outer portion of the cup is deformed by the fluid flow, and through a fluid passage defined between the cup and the front end wall of the groove by the projections.
REFERENCES:
patent: 4249381 (1981-02-01), Gaiser
patent: 4414811 (1983-11-01), Gaiser
patent: 4527395 (1985-07-01), Gaiser et al.
patent: 5878575 (1999-03-01), Kreh et al.
patent: 6272858 (2001-08-01), Takano et al.
patent: 6978614 (2005-12-01), Bourlon et al.
patent: 2004/0079078 (2004-04-01), Bacardit et al.
patent: 2000-071969 (2000-03-01), None
patent: WO02/064410 (2002-08-01), None
Mita Katsuhiro
Suzuki Koji
Tsubouchi Kaoru
Advics Co., Ltd.
Buchanan & Ingersoll PC
Kershteyn Igor
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