Fluid handling – Systems – Multi-way valve unit
Reexamination Certificate
2005-02-08
2005-02-08
Fox, John (Department: 3753)
Fluid handling
Systems
Multi-way valve unit
C137S625690, C137S625340
Reexamination Certificate
active
06851451
ABSTRACT:
What is disclosed is a method for manufacturing a valve piston, as well as a valve piston, wherein flow in the fine control range is determined through control windows formed by a through opening extending through the valve body.
REFERENCES:
patent: 3817276 (1974-06-01), Schexnayder
patent: 5092039 (1992-03-01), Gaskell
patent: 6397890 (2002-06-01), Mickelson et al.
patent: 41 08 272 (1992-09-01), None
patent: 198 56 563 (2000-06-01), None
Grundler, Edgar: Lupenreines Erodieren oder Erodieren mit der Lupe. In: TR Transfer , Nr. 38, 1996, S. 44, 45.
Bosch Rexroth AG
Boyle Fredrickson Newholm Stein & Gratz S.C.
Fox John
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