| 摘要 |
A louver braking mechanism for use in shutters, used to hold the louvers in place against the moment arm resulting from the weight of the tilt bar urging the louvers to close. The disclosed mechanisms provide a frictional resistance to the louver pivotal movement, which must be overcome by the user in order to reposition the louvers. In a preferred embodiment, the frictional resistance increases as the louver begins to pivot.
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