CYLINDER

WIPO Patent Application WO/2019/239795

A1

The present invention makes a rotary movement smooth, the rotary movement allowing direct detection of the movement of an output member of a rotary clamp. In a clamp, an output member 5 is accommodated in a cylinder hole 2. A first valve chamber 21, to which compressed air is supplied, is provided between a lower wall 1b of a housing 1 and the output member 5. A second valve chamber 23 is hollowed out of the output member 5 so as to be provided open toward the first valve chamber 21. A valve rod 10c is inserted into the second valve chamber 23 from the lower wall 1b. A valve rod passage 10d that allows the second valve chamber 23 to communicate with outside air is provided in the valve rod 10c, and a seal section 27 is provided in a peripheral gap where the valve rod 10c and the second valve chamber 23 move relatively to one another. The gap is formed so that, as the valve rod 10c and the second valve chamber 23 are in relative movement, there is a region which is sealed by the seal section 27 against movement of the compressed air through the gap between the valve rod and the second seal chamber and there is a region which is open from the seal.

YOSHIMI MASAHIRO (JP)

PCT/JP2019/019828

December 19, 2019

May 20, 2019

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KOSMEK LTD (JP)

B23Q17/00; B23Q3/06; F15B15/14

JPH09280211A	1997-10-28
JP2007268625A	2007-10-18
JP2012166276A	2012-09-06
JP2014108490A	2014-06-12
JP2015020221A	2015-02-02
EP0173169A1	1986-03-05
JP2003305626A	2003-10-28
JP2015020221A	2015-02-02

KASEGUMA Tsuguhisa (JP)

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