| 摘要 |
<p>TITLE A LIFEJACKET A lifejacket has an inflatable body defining a head receiving opening having a closed periphery. The opening is elongated to reduce the stress tending to open the seam at the periphery of the body when inflated. Restraints join the periphery of the opening on the side remote from the head end of the body to the head end of the body on opposite faces respectively of the body. These restraints are so dimensioned that, when the body is deflated, they lie loosely across the opening and do not impede insertion of the wearer's head therethrough and when the body is inflated, they are stretched taut across the opening and inhibit the wearer's head slipping back through the opening.</p> |
