| 摘要 |
According to the present invention impact damage to a mail box can be prevented entirely or at least minimized to the extent whereby the mail box can still function by enclosing the exterior surface of the mail box in a novel cage constructed of impact resistant material and adapted to be fastened to the mail box standard in such manner that any impact force applied to the cage is primarily transmitted from the cage to the mail box standard. The cage is further characterized by a flexural strength adequate to prevent it upon being subjected to an impact force from indenting or otherwise deforming the mail box surface to an extent preventing satisfactory opening and closing of the mail box door by U.S. Post Office personnel.
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