| 摘要 |
<p>PURPOSE:To usually keep a predetermined quantity of oil in a tank by connecting an auxiliary tank to the upper portion of the oil tank via a feed oil pipe and providing a feed oil valve at the oil tank side feed oil port of the feed oil pipe. CONSTITUTION:An auxiliary tank 1 is connected to the upper portion of an oil tank 4 via a feed oil pipe 2 and a cap with a breather is provided at the auxiliary tank 1. A feed oil valve 3, which is opened when oil in the oil tank 4 decreases less than a predetermined quantity is provided at the oil tank 4 side feed oil port of the feed oil pipe 2. As the oil in the oil tank 4 decreases by a predetermined quantity, the feed oil valve 3 is thereby opened to supply oil to the oil tank 4 from the auxiliary tank. Accordingly, the oil in the oil tank 4 can be usually obtained by the predetermined quantity so that the hydraulic machineries can be smoothly operated.</p> |
