Fluid pressurized arrow shaft for archery arrows

Details Fluid pressurized arrow shaft for archery arrows Fluid pressurized arrow shaft for archery arrows

1985-02-27

1985-09-17

Shapiro, Paul E.

Amusement devices: games

Aerial projectile game; game element or accessory therefor...

Projectile backstop

F41B 502

Patent

active

045416362

ABSTRACT:
An archery arrow having an elongated hollow shaft with a nock mounted on the rear end thereof and a front end that mounts an internally threaded broadhead or arrow point insert. An arrow broadhead or point is threaded into the insert bore to extend forwardly of the shaft while a rubber seal member is mounted by the insert to extend rearwardly thereof and within the shaft. The nock and insert are in fluid sealing relationship with the shaft while the seal member, nock and shaft define a fluid chamber extending between the nock and seal member. The seal member permits a needle point being extended thereinto to permit pressurized fluid passing into the above mentioned chamber. In the first and third embodiments the needle point extends axially through the seal member while in the second embodiment the needle point is extended only part of the axial distance through the seal member so that the fluid flows through cross passages to an annular chamber bound by the seal member and shaft and then axially between adjacent surface parts of the shaft and seal member to pressurize the shaft rearwardly of the seal member. In each of the embodiments, the pressurization of the shaft makes the shaft more rigid and thereby less subject to bending.

REFERENCES:
patent: 1989847 (1935-02-01), Cowdery
patent: 3586332 (1971-06-01), Alban
patent: 4410183 (1983-10-01), Miller

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