| 摘要 |
PURPOSE:To decrease the leakage of pressure oil to the outside by forming a drain recovery passage opening to a slit in a cylinder barrel and providing a drain port which intercommunicates with the drain recovery passage in a cylinder body. CONSTITUTION:A drain recovery passage 6 opening to a slit 3 is formed between the outer circumferential surface of the inner barrel 1a of a cylinder barrel 1b and the inner circumferential surface of the outer barrel 16 thereof, and a drain port 16 which intercommunicates with the drain recovery passage 6 on opposite side portion to the slit 3 is engraved in an end cap 4. Owing to the above arrangement, even though pressure oil leaks from the sealed portions of an inner seal band 23 and an outer seal band 24 to the outside, the pressure oil can be collected from the drain port 16, and thereby the leakage of pressure oil from the sealed portions can be decreased. |
