Title:
CYLINDER DEVICE, AND DISC BRAKE DEVICE FOR RAILWAY VEHICLE
Document Type and Number:
WIPO Patent Application WO/2012/049745
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing a small cylinder device capable of increasing the urging force of a rod, and of providing a disc brake device for a railway vehicle using the cylinder device. A cylinder device (2) comprises: a cylinder main body (20); a rod (30); a piston (40) provided within the cylinder main body (20) so as to surround the axis of the rod (30), the piston being allowed to move parallel to the advancing/retracting direction of the rod (30), and being moved by air pressure in the retracting direction of the rod (30); and a force-increasing mechanism for increasing the force generated in the piston (40) and acting on the rod (30) so that the rod (30) moves in the advancing direction when the piston (40) moves in the retracting direction of the rod (30) (the force-increasing mechanism comprising an inclined surface (42a) of the piston (40), a receiving member (50) on the main body side; a rotating member (60), a rod-side receiving member (70), and steel balls (54, 55).
Inventors:
OHNO TOMOYA (JP)
OZAWA YOICHIRO (JP)
NAKAMURA JYOICHI (JP)
OZAWA YOICHIRO (JP)
NAKAMURA JYOICHI (JP)
Application Number:
PCT/JP2010/067968
Publication Date:
April 19, 2012
Filing Date:
October 13, 2010
Export Citation:
Assignee:
NABTESCO CORP (JP)
OHNO TOMOYA (JP)
OZAWA YOICHIRO (JP)
NAKAMURA JYOICHI (JP)
OHNO TOMOYA (JP)
OZAWA YOICHIRO (JP)
NAKAMURA JYOICHI (JP)
International Classes:
F15B15/02; F16D55/224; F16D65/18
Foreign References:
| JPH11173307A | 1999-06-29 | |||
| JP2002160135A | 2002-06-04 | |||
| JP2004270716A | 2004-09-30 | |||
| JP2009180269A | 2009-08-13 | |||
| JPS61175330A | 1986-08-07 | |||
| JP2007131203A | 2007-05-31 |
Attorney, Agent or Firm:
KAJI, Yoshiyuki et al. (JP)
梶 Yoshiyuki (JP)
梶 Yoshiyuki (JP)
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Claims: