Bi-delta vane

Details Bi-delta vane Bi-delta vane

1979-09-19

1980-11-18

Shapiro, Paul E.

Amusement devices: games

Problem eliciting response

F41B 502

Patent

active

042341922

ABSTRACT:
A fletching element for an arrow includes relatively small leading and relatively large trailing guide vanes joined in spaced relationship by a mounting rib; the mounting edges of the guide vanes and the rib being adapted to be fixed to the rearward end of an arrow to assume a generally helical twist. Preferably, the spacing between vanes is such as to permit the rear edge of the leading vane to be arranged essentially in an adjacent annular offset relationship relative to the front edge of the trailing vane.

REFERENCES:
patent: 2193397 (1940-03-01), Dykes
patent: 2887319 (1959-05-01), Lay
patent: 2989310 (1961-06-01), Lamond
patent: 3071127 (1963-01-01), Spack
patent: 3181269 (1965-05-01), Nixon
patent: 3614947 (1971-10-01), Feldman
patent: 3865374 (1975-02-01), Troncoso, Jr.
patent: 3895802 (1975-07-01), Bear

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