Adjustable hurdle

Details Adjustable hurdle Adjustable hurdle

1990-02-06

1991-07-23

Bahr, Robert

Undertaking

272 62, 272DIG4, 182182, 211203, 248164, A63B 502

Patent

active

050337378

ABSTRACT:
Adjustable hurdle apparatus (10, 110) positionable on a running track as a barrier to runners in track events including a supporting framework (11, 111), a horizontal crossbar (45, 75, 120) to be cleared by runners positioned proximate an extremity of the supporting framework, a base (12, 112) attached to the supporting framework proximate the extremity of said framework opposite the horizontal crossbar for normally maintaining the supporting framework in a substantially vertical orientation relative to the track, and means (25, 26; 75, 76; 130) for infinitely adjustably vertically positioning the horizontal crossbar from competition heights to heights which are substantially below the lowest competition height.

REFERENCES:
patent: 468625 (1892-02-01), Medart
patent: 615443 (1898-12-01), Foster
patent: 1044128 (1912-11-01), Brook
patent: 1295265 (1919-02-01), Bradley
patent: 1737108 (1929-11-01), Craig
patent: 2368740 (1945-02-01), Blomgren
patent: 2410330 (1946-10-01), Ashenfelter
patent: 2572928 (1951-10-01), Hawes
patent: 3024022 (1962-03-01), Goyette
patent: 3394932 (1968-07-01), Leflar
patent: 3685824 (1972-08-01), Quinn

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