Abrading – Abrading process – Utilizing fluent abradant
Reexamination Certificate
2005-10-11
2005-10-11
Nguyen, Dung Van (Department: 3723)
Abrading
Abrading process
Utilizing fluent abradant
C451S008000, C451S559000
Reexamination Certificate
active
06953387
ABSTRACT:
A method and apparatus for comparing the flow rate through an orifice within a master part with the orifice within a workpiece by subjecting each orifice to an identical fluid at an identical temperature, under an identical pressure, and comparing the downstream pressures of the fluid exiting these orifices when the upstream pressure is constant or comparing the upstream pressure when the downstream pressure is constant. For purely measurement purposes, the fluid may be a non-abrasive media, however, in the event the workpiece orifice must be machined, it is possible to introduce a flowable abrasive media, and pass this media through the orifices until the desired pressure difference is achieved. With additional flow characteristics of the master part, it is also possible to calculate the flow rate through the workpiece orifice using only the pressure differential at the exits of the workpiece and the master part.
REFERENCES:
patent: 5054247 (1991-10-01), Rhoades et al.
patent: 5076027 (1991-12-01), Rhoades
patent: 5807163 (1998-09-01), Perry
patent: 6306011 (2001-10-01), Perry et al.
patent: 6500050 (2002-12-01), Walsh et al.
Greenslet John M.
Rhoades Lawrence J.
Extrude Hone Corporation
Nguyen Dung Van
The Webb Law Firm
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