| 摘要 |
A one-piece air circulation vent is disclosed for piercing and maintaining a ventilation opening in a flexible cover or the like. The vent includes a stiff, but res ilient body structure which comprises a main panel member generally triangular in plan and definin g convergent sides edges and an apex facing in the forward direction. The main panel mem ber is arched transversely of the forward direction and has a generally V-shaped slot form ed therein including convergent legs generally paralleling the convergent side edges of the panel member. The V-shaped slot defines the main panel into a generally triangular central cutting section and a peripheral retaining section. The side edges of the central section conve rge toward a sharpened apex inward of the apex of the panel member. The central section with its sharpened apex is slightly deflectable relative to the remainder of the pane l member. The rear of the body structure has a louvered rear panel to allow air circulation int o and out from underneath the cover.
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