| 摘要 |
A refill valve for use in an hydraulic locking device such as that utilized in a chair to control the angle between the backrest and the seat. The refill valve comprises a fluid passageway for refilling the hydraulic locking device, a check valve being mounted within the passageway, having an extension thereon for cooperation with an oil can or other delivery means to open the check valve during refilling and also to allow relief of any over-pressure which may occur during the refilling. Additionally, the refill valve is adjustable within the hydraulic locking device so as to control the override function of the locking valve in the device.
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