| 摘要 |
<p>A cap 1 for closing an aperture in a reservoir for fluid in an automobile brake, coolant or power steering system comprises an inner cap member 2 for securing over the aperture and an outer cap member 3. The inner and outer cap members 2,3 have co-operating formations 10,16 which interlock when the outer cap member 3 is rotated in a direction to release the cap 1. The formations 10,16 provide frictional engagement when the outer cap member 3 is rotated in the opposite direction up to a threshold torque to secure the cap 1. The outer cap member 3 is rotatable relative to the inner cap member 2 when the threshold torque is exceeded to prevent over-tightening of the cap 1 and to enable the circumferential orientation of the outer cap member 3 relative to the inner cap member 2 to be adjusted when the cap is secured 1. <IMAGE></p> |
