Abrading – Machine – Sandblast
Reexamination Certificate
2005-07-05
2005-07-05
Wilson, Lee D. (Department: 3723)
Abrading
Machine
Sandblast
C269S021000
Reexamination Certificate
active
06913524
ABSTRACT:
The invention comprises a suction housing connected to a negative pressure forming means to suck in fluids, a suction opening member mounted on the suction housing, a part of which is caused to contact the surface of an object, and which defines a pressure-reduced area together with the suction housing and the surface of an object, and a means for maintaining the distance between the suction housing and the surface of an object at a predetermined distance, wherein the suction opening member and the surface of an object where in contact with each other are caused to be detached from each other partially or entirely due to the increase in the fluid pressure difference between the inside and the outside of the pressure-reduced area, resulting in the communication between the inside and the outside of the pressure-reduced area, allowing the outside fluid to flow into the pressure-reduced area.
REFERENCES:
patent: 1323843 (1919-12-01), Curtiss
patent: 3788010 (1974-01-01), Goff
patent: 4095378 (1978-06-01), Urakami
patent: 5291692 (1994-03-01), Takahashi et al.
patent: 6152808 (2000-11-01), Moore
patent: 6210260 (2001-04-01), Tanaka et al.
patent: 6517420 (2003-02-01), Ishikawa et al.
patent: 2000-006860 (2000-01-01), None
Hogan & Hartson LLP
Wilson Lee D.
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