Rotary expansible chamber devices – Miscellaneous
Reexamination Certificate
2006-04-18
2006-04-18
Trieu, Theresa (Department: 3748)
Rotary expansible chamber devices
Miscellaneous
C418S104000, C418S114000, C418S133000, C418S143000, C418S149000
Reexamination Certificate
active
07029253
ABSTRACT:
A pneumatic cylinder of pneumatic tool capable of avoiding failure of bearings, including: a cylinder body having an internal cylindrical chamber in which a rotor is disposed, a rotary shaft being fixedly connected with the rotor, whereby high pressure air can flow into the cylinder body to drive and rotate the rotor and the rotary shaft; two end caps respectively covering two ends of the cylinder body, two ends of the rotary shaft respectively extending out of the cylinder body through the through holes of the two end caps; two bearings respectively installed in the cavities of the two end caps and fitted on two ends of the rotary shaft; and two airtight rings located between the bottom walls of the cavities and the bearings to achieve an airtight effect between the bottom walls of the cavities and the bearings.
REFERENCES:
patent: 2762340 (1956-09-01), Roggenburk
patent: 3642389 (1972-02-01), Chambers et al.
patent: 3880245 (1975-04-01), Anderson, Jr.
patent: 3927956 (1975-12-01), Linthicum
patent: 5947712 (1999-09-01), Viegas et al.
patent: 1197498 (1959-12-01), None
patent: 2060076 (1981-04-01), None
Gison Machinery Co., Ltd.
Troxell Law Office PLLC
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