| 摘要 |
A lash adjuster includes a cylindrical bottomed plunger (12) mounted in a cylindrical bottomed body (11) so as to be movable upward and downward and including a high-pressure chamber (25) defined between an underside of the plunger (12) and a bottom wall of the body (11) to reserve an operating oil, a leak path (32) defined by an inner circumference of the body (11) and an outer circumference of the plunger (12) so that the oil reserved in the high-pressure chamber (25) leaks through the leak path (32) with downward movement of the plunger (12), and a ring-shaped member (34) located between the inner circumference of the body (11) and the outer circumference of the plunger (12), normally projecting into the leak path (32) and being elastically deformed radially inward or outward with increase in pressure of the oil at the high-pressure chamber (25) side so as to be retreated from the leak path (32), thereby reducing flow resistance of the oil in the leak path (32).
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