Games using tangible projectile – Projectile – per se; part thereof or accessory therefor – Arrow – dart – or shuttlecock; part thereof
Reexamination Certificate
1999-12-20
2001-03-20
Ricci, John A. (Department: 3712)
Games using tangible projectile
Projectile, per se; part thereof or accessory therefor
Arrow, dart, or shuttlecock; part thereof
Reexamination Certificate
active
06203457
ABSTRACT:
BACKGROUND
There have been many attempts at improving the nock on an archery arrow to improve the flight of the arrow. Most of these attempts have failed to focus on the feathers attached to the shaft of an arrow. The feathers on the shaft of the arrow present an economic problem as well a drag problem. Economically, feathers increase the cost of an arrow due to cost of materials and due to the cost manufacturing in order to fletch the feathers onto the shaft of the arrow. The drag problem stems from the size of the feather needed to stabilize the arrow in flight. Stabilization of the arrow in flight requires the feathers to use the air flow around the arrow to spin the arrow shaft. The problem lies in that the bigger the feather, the more drag is produced in flight. This drag inhibits the velocity an arrow can move through the air, but without the feathers the arrow would not fly very far. The disclosure of one of the prior art nocks speaks to the elimination of feathers from the arrow. The complete removal of the feathers has been found to be ineffective for producing an arrow which can fly in a straight path for any distance. In fact that same disclosure states that the path of the arrow is comparatively straight, meaning it is not a true straight spinning path that the arrow flies when it leaves the bow.
It is an objective of the present invention to reduce the size feather required on an arrow shaft using an improved nock and feather system.
It is another objective of the present invention to eliminate the fletching of feathers on the arrow shaft, thereby reducing the cost of arrow manufacturing.
It is another objective to decrease the drag on an arrow, thereby increasing the velocity of the arrow in flight.
SUMMARY OF THE INVENTION
The present invention provides different embodiments of a nock and feather system which decreases the drag on an arrow in flight and reduces the cost of making an arrow. All of the embodiments employ a twist nock having a front end, a rear end and a surface area between the front end and rear end. The front end of the twist nock includes a hollow portion for inserting and securing a rear end of an arrow to the twist nock. The rear end of the twist nock includes a slot to receive a bow string. The slot is defined by two sets of two edges and two rear surfaces between the sets. Each edge has a first end and a second end. The slot is a twisted opening have a pitch of about ninety-degrees per inch. The pitch is defined by the position of the first end in relation to the second end of each of the edges. When an arrow having the twist nock is fired from a bow, the arrow begins to spin due to the twisted opening and not due to the feathers. That is because it takes a bit of time for an arrow to spin due to the feathers alone, whereas the twist nock puts an instant spin on the arrow when the twist nock leaves the bow string. The instant spin on the arrow is caused by the twisted opening, whereby the twist nock must twist or spin in order to release itself from the bow string when fired. The feathers are disclosed in different locations of the arrow and nock.
REFERENCES:
patent: 2209672 (1940-07-01), Boggs
patent: 2277743 (1942-03-01), Crossman
patent: 3658335 (1972-04-01), Saunders
patent: 5039110 (1991-08-01), Honda
Elnitski, Jr. John J.
Ricci John A.
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