Power plants – Pressure fluid source and motor – Pulsator
Reexamination Certificate
2005-12-13
2005-12-13
Look, Edward K (Department: 3745)
Power plants
Pressure fluid source and motor
Pulsator
Reexamination Certificate
active
06973784
ABSTRACT:
A master cylinder includes a cylinder main body forming a piston mount space and a piston mounted in the cylinder main body. An auxiliary supplying/discharging passage communicating sideways with the piston mount space is provided at a longitudinally middle portion of the cylinder main body. The inner circumferential surface of the cylinder main body and the outer circumferential surface of the piston are shaped such that a communication path communicating a pressure chamber near a supplying/discharging opening and the auxiliary supplying/discharging passage is formed at the outer side of a seal ring mounted on the piston with the piston moved back to a rearmost position most distanced from the supplying/discharging opening. The position of the piston and the pressure in the pressure chamber can be stabilized when the piston is located at a rearmost position from the supplying/discharging opening.
REFERENCES:
patent: 3141303 (1964-07-01), Baldwin
patent: 3473330 (1969-10-01), Fritz
patent: 5715681 (1998-02-01), Williamson
patent: 6418717 (2002-07-01), Christiaens et al.
patent: 6584771 (2003-07-01), Keller et al.
patent: 6769254 (2004-08-01), Heller et al.
patent: 0416753 (1991-03-01), None
patent: 1543045 (1968-10-01), None
patent: 541151 (1941-11-01), None
Casella Anthony J.
Hespos Gerald E.
Leslie Michael
Look Edward K
Nabco Ltd.
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