Arrowhead having expanding blades controlled by gear mechanism
OwnerYoung Ki Leeinventor
Life of this patent
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Abstract
Disclosed is an arrowhead in which a plurality of expandable blades can be quickly and reliably retracted or expanded without using an additional means to bundle the expanding blades, thereby enhancing the penetrating capability or killing capability of an arrow. Particularly, a portion of a shaft forming the arrowhead is provided with a rack gear portion installed thereon and a lower end of each of the expanding blades is provided with a pinion gear portion, such that the rack gear portion and the pinion gear portion engage with each other and such a rack-pinion action controls the operation of retracting or expanding the expanding blades.
Claims10
An arrowhead having expanding blades controlled by a gear mechanism, comprising:
- a penetrating tip including a sharpened leading end and a screw thread formed on an inner peripheral surface thereof;
- a main body adapted to allow a lower end of the penetrating tip to be inserted therein, the main body including a body portion having a hollow portion therein and openings on upper and lower end sides thereof, a plurality of expanding blade coupling pieces formed on an outer surface of the body portion, and a plurality of expanding blade receiving grooves respectively formed on a surface of each of the plurality of expanding blade coupling pieces;
- a plurality of expanding blades respectively hingedly and rotatably coupled to each of the expanding blade coupling pieces, the plurality of expanding blades each including a blade formed on one side end thereof and a pinion gear portion formed on a lower end thereof;
- a shaft including a body portion, a front-end threaded portion formed on an upper end of the body portion to be coupled to the screw thread of the penetrating tip, a rear-end threaded portion formed on a lower end of the body portion to be coupled to an arrow shaft, a rack gear portion provided on an outer peripheral surface of the body portion to be engaged with the pinion gear portion, and a stopper formed to protrude from the outer peripheral surface below the rack gear portion;
- and
- a spring mounted on the shaft;
- wherein a relative movement between the rack gear portion and the pinion gear portion causes a retraction or expansion of the expanding blades.
Dependencies are inferred from the claim text.