PNEUMATIC TOOL

WIPO Patent Application WO/2017/130994

A1

[Problem] To provide a pneumatic tool in which an expansion chamber is formed without requiring an increase in the external size of a housing. [Solution] In this pneumatic tool, a housing has: a cylindrical motor housing section 30A that has a motor-accommodating part 30a and an output shaft-accommodating part 30b which is connected contiguously to an end of the motor-accommodating part 30a, and which accommodates an annular bearing 22 and a motor output shaft extending out of the annular bearing; a tool shaft housing part 30B; and a curved corner housing part 30C that connects the motor housing part 30A and the tool shaft housing part 30B. The output shaft accommodating part 30b has an expansion chamber 36 which is connected to an exhaust connection hole 34 extending radially outward of the annular bearing 22, and which extends in the circumferential direction and the longitudinal axis direction. The expansion chamber 36 is configured to have an inner volume large enough to allow for expansion of exhaust air that passes through the exhaust connection hole 34 and comes into the expansion chamber 36.

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MURAKAMI KEIICHI (JP)
IMAI TAISHIN (JP)

PCT/JP2017/002427

August 03, 2017

January 25, 2017

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NITTO KOHKI CO (JP)

B25F5/00; B24B23/02; B25F5/02

JP2001088056A	2001-04-03
JP2000343400A	2000-12-12

ITOH, Shigeru et al. (JP)

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