Title:
SWING-TYPE CLAMP
Document Type and Number:
WIPO Patent Application WO/2007/145142
Kind Code:
A1
Abstract:
A piston (19) inserted in a tubular housing (2) is connected to a clamp rod (5).
A lock chamber (20) is provided on the upper side of the piston (19), and an annular
valve chamber (41) is formed in the peripheral wall of a rod hole (18) in which the
clamp rod (5) is inserted. In the last stage of swing and ascent of the clamp rod
(5), a shuttle member (42) fitted over the lower part of the clamp rod (5) rises
and fits into the valve chamber (41) by an effect of differential pressure of pressure
oil acting when the shuttle member (42) starts to fit into the valve chamber (41).
Then, the flow rate of pressure oil discharged from the lock chamber (20) is controlled
by a restricting clearance between the shuttle member (42) and the clamp rod (5).
Also, in the initial stage of swing and descend of the clamp rod (5), the flow rate
of pressure oil supplied to the lock chamber (20) is controlled by a restricting
clearance between the valve chamber (41) and the shuttle member (42).
Inventors:
YONEZAWA KEITARO (JP)
YOKOTA HIDEAKI (JP)
YOKOTA HIDEAKI (JP)
Application Number:
PCT/JP2007/061630
Publication Date:
December 21, 2007
Filing Date:
June 08, 2007
Export Citation:
Assignee:
KOSMEK LTD (JP)
YONEZAWA KEITARO (JP)
YOKOTA HIDEAKI (JP)
YONEZAWA KEITARO (JP)
YOKOTA HIDEAKI (JP)
International Classes:
B23Q3/06
Foreign References:
| JP2005329525A | 2005-12-02 | |||
| JPH0663905U | 1994-09-09 | |||
| JP2003049807A | 2003-02-21 | |||
| JPS5882510U | 1983-06-04 | |||
| JP2005329525A | 2005-12-02 |
Attorney, Agent or Firm:
KAJI, Yoshiyuki et al. (SUHARA & ASSOCIATESRecruit Shin Osaka BLDG. 14-22,Nishinakajima 5-chome, Yodogawa-k, Osaka-shi Osaka 11, JP)
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