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Title:
COMPRESSED AIR-DRIVEN SCREW TIGHTENING MACHINE
Document Type and Number:
WIPO Patent Application WO/2005/014231
Kind Code:
A1
Abstract:
A compressed air-driven screw tightening machine adapted to supply compressed air to an air motor (4) to rotatively drive a driver bit (9) and, concurrently therewith, to propel the driver bit (9) in the screw tightening direction, so as to the screw, wherein an exhaust path (24) for discharging into the atmosphere the compressed air discharged from the air motor (4) is provided with an exhaust control valve (30) for variably controlling the cross-sectional area of the exhaust path (24). The exhaust control valve (30) variably controls the amount of air being discharged from the air motor (4).

Inventors:
Fujiyama, Takeo c/o Max Co. Ltd. (6-6, Nihonbashihakozaki-ch, Chuo-ku Tokyo, 103-8502, JP)
Tamura, Junichi c/o Max Co. Ltd. (6-6, Nihonbashihakozaki-ch, Chuo-ku Tokyo, 103-8502, JP)
Satsuka, Masafumi c/o Max Co. Ltd. (6-6, Nihonbashihakozaki-ch, Chuo-ku Tokyo, 103-8502, JP)
Okushima, Hideki c/o Max Co. Ltd. (6-6, Nihonbashihakozaki-ch, Chuo-ku Tokyo, 103-8502, JP)
Application Number:
PCT/JP2004/011636
Publication Date:
February 17, 2005
Filing Date:
August 06, 2004
Export Citation:
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Assignee:
MAX CO., LTD. (6-6 Nihonbashihakozaki-cho, Chuo-ku, Tokyo, 103-8502, JP)
Fujiyama, Takeo c/o Max Co. Ltd. (6-6, Nihonbashihakozaki-ch, Chuo-ku Tokyo, 103-8502, JP)
Tamura, Junichi c/o Max Co. Ltd. (6-6, Nihonbashihakozaki-ch, Chuo-ku Tokyo, 103-8502, JP)
Satsuka, Masafumi c/o Max Co. Ltd. (6-6, Nihonbashihakozaki-ch, Chuo-ku Tokyo, 103-8502, JP)
Okushima, Hideki c/o Max Co. Ltd. (6-6, Nihonbashihakozaki-ch, Chuo-ku Tokyo, 103-8502, JP)
International Classes:
B25B21/00; B25B21/02; B25B23/00; (IPC1-7): B25B21/02
Attorney, Agent or Firm:
Oguri, Shohei (Eikoh Patent Office, 13th Floor ARK Mori Building, 12-32, Akasaka 1-chom, Minato-ku Tokyo, 107-6013, JP)
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