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US 8,911,311 B1Granted
Expandable arrowhead or broadhead and spring element
AssigneeNew Archery Products Corp.
InventorsRobert S. Mizek, Hans Vogel
Life of this patent
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AssigneeNew Archery Products Corp.
InventorsRobert S. Mizek, Hans Vogel
Estimating the term…
An expandable arrowhead having a blade-carrying body with a slot that houses at least one movably mounted blade. Each blade can be pivotally mounted about a shaft. In some embodiments, the shaft is fixed with respect to the body. In other embodiments, the shaft is movably mounted with respect to the body, for example by mounting a shaft within the slot so that the shaft moves within the slot with respect to the blade-carrying body. In some embodiments of this invention, a spring element positively holds one or more blades in a closed position or a retracted position, particularly during extreme forces encountered when launching an arrow from an archery bow, such as a compound archery bow. The spring element of this invention can be used to improve blade opening capabilities of conventional blade-opening arrowheads or broadheads.
An expandable arrowhead comprising:
An expandable arrowhead comprising:
Dependencies are inferred from the claim text.