1977-02-28
1978-05-16
Schnall, Jerome
Undertaking
A63B 6900
Patent
active
040895190
ABSTRACT:
A starting block assembly for locating at a starting position of a running track. An elongated, ground-anchorable central bar is formed with a pair of back-to-back T-shape lengthwise slide tracks, each opening to a respective side of the bar and receiving therethrough an L-shaped runner which extends from the side of a respective starting block having a spring-tensioned anchor pin receivable in a series of positioning sockets located along the bar. Each triangular shaped block has concave front and rear, transverse contact faces, one with a resilient surface and the other spike-receiving openings to accommodate the shoes of a user. Use of a chosen surface depends on the directional positioning of the assembly. The T-track is self-cleaning of grit which might otherwise jam movement of the L-runner along the track, due to possibility of transversely rocking the block on the longitudinal axis of the runner when the anchor pin is disengaged.
REFERENCES:
patent: 2900187 (1959-08-01), Hondorp
patent: 2937871 (1960-05-01), McCafferty
patent: 3494615 (1970-02-01), Moore
patent: 3608897 (1971-09-01), Ross
Johnson Howard L.
Schnall Jerome
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