| 摘要 |
PURPOSE:To enhance sealing performance between the cylinder and piston by such a construction that a teflon ring is pressed against the internal wall of the cylinder in accordance with the pressure of the pressure oil intruding into the ring groove. CONSTITUTION:This oil pressure cylinder is provided with a pair of ring grooves 13, 14 formed in the periphery of a piston 12, O-rings 15, 16 fitted in these ring grooves 13 and 14, respectively, and teflon rings 17, 18 which are formed in rings having a slightly smaller width than the opening width of the ring grooves 13, 14, pinched between the O-rings 15, 16 and the internal wall of the cylinder 11, and are fitted in the ring grooves 13, 14 in such a way as approaching each other inward. An oil pressure port is furnished at each side of this oil pressure cylinder and the piston 12 slides between these oil pressure ports reciprocatively. |
