Title:
CHAIN TENSIONER
Document Type and Number:
WIPO Patent Application WO/2013/061777
Kind Code:
A1
Abstract:
Provided is a chain tensioner in which the decrease in the damper effect immediately after the engine is restarted can be effectively suppressed, and in which an assist spring is not necessary. A chain tensioner having: a plunger (10) slidably inserted into a cylinder (9); a check valve (13) incorporated into the cylinder (9); a pressure chamber (14) formed between the check valve (13) and the plunger (10); and an oil supply channel (15) for introducing working oil via the check valve (13) into the pressure chamber (14), wherein a configuration is employed in which the check valve (13) has a valve spring (22) for urging a valve body thereof (21) from an open-valve position towards a closed-valve position, and the oil supply channel (15) comprises an oil introduction hole (16) for introducing the working oil from the exterior of the cylinder (9), and a reservoir chamber (17) formed adjacent to the upstream side of the check valve (13).
Inventors:
FURUKAWA TASUKU (JP)
Application Number:
PCT/JP2012/076227
Publication Date:
May 02, 2013
Filing Date:
October 10, 2012
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD (JP)
International Classes:
F16H7/08
Foreign References:
| JP2005036873A | 2005-02-10 | |||
| JP2010138942A | 2010-06-24 | |||
| JP2010286090A | 2010-12-24 | |||
| JP2011179622A | 2011-09-15 | |||
| JP2010270810A | 2010-12-02 |
Attorney, Agent or Firm:
KAMADA Bunji et al. (JP)
Bunji Kamata (JP)
Bunji Kamata (JP)
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Claims: