Abrading – Frame or mount – Portable abrader
Reexamination Certificate
2007-07-03
2007-07-03
Wilson, Lee D. (Department: 3723)
Abrading
Frame or mount
Portable abrader
C451S357000, C173S104000, C173S117000
Reexamination Certificate
active
11601826
ABSTRACT:
A pneumatic grinder with improved muffling structure primarily comprises a driving portion, a grinding wheel fixing portion provided at one end of the driving portion, a first housing connected to the other end of the driving portion by means of a combining portion, a second housing mounted onto the first housing, and a plurality of first and second exhaust openings arranged in staggered fashion respectively on the first and second housings. Said structure allows the pneumatic grinder to discharge waste air through foresaid two layers of exhaust openings in staggered fashion arranged in order to reduce noise during air exhaust.
REFERENCES:
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patent: 4113052 (1978-09-01), McElroy, Jr.
patent: 5017109 (1991-05-01), Albert et al.
patent: 5383771 (1995-01-01), Ghode et al.
patent: 5911281 (1999-06-01), Treskog et al.
patent: 6751952 (2004-06-01), Chen
patent: 2002/0139547 (2002-10-01), Nowak et al.
Cheng Chuan-ching
Sun Yung-yung
Ojini Anthony
Rosenberg , Klein & Lee
Storm Pneumtic Tool Co., Ltd.
Wilson Lee D.
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