PNEUMATIC TOOL

WIPO Patent Application WO/2007/007745

A1

A pneumatic tool with a simple structure. The tool has a tubular housing (50), a stationary shaft (52), a first piston (56) slidable along the stationary shaft, a second piston (58), a tool installation member (60) drivingly connected to the second piston, a compressed air supply path (70) passing through the stationary shaft and supplying compressed air between the first and second pistons, and an air discharge path (76) for discharging the compressed air, supplied between the first and second pistons, to the outside of the housing when the first and second pistons are separated by a predetermined interval. The compressed air supply path has an axial section (70a) in the stationary shaft and a radial section (70b), a compressed air inlet recess (70c) in the inner wall surface of a shaft sliding hole, and a supply outlet (70d) extending forward from the forward end of the compressed air inlet recess and communicating with a portion between the first and second pistons.

SHIBUYA KUNIAKI (JP)
YAMAGUCHI MUNENORI (JP)
SUZUKI YASUMASA (JP)
NAKAJOH TAKASHI (JP)

PCT/JP2006/313756

January 18, 2007

July 11, 2006

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NITTO KOHKI CO (JP)
SHIBUYA KUNIAKI (JP)
YAMAGUCHI MUNENORI (JP)
SUZUKI YASUMASA (JP)
NAKAJOH TAKASHI (JP)

B25F5/00; B23D51/18

US5755292A	1998-05-26
JPS55157486A	1980-12-08
JPH11114854A	1999-04-27
JPS4818364U	1973-03-01
JPS56112241A	1981-09-04
JP2002200581A	2002-07-16
JP2005111602A	2005-04-28

ITOH, Shigeru (4-8 Akasaka 1-chom, Minato-ku Tokyo 52, JP)

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