Tumbling board and spring assembly

Details Tumbling board and spring assembly Tumbling board and spring assembly

1980-12-22

1984-01-17

Johnson, Richard J.

Undertaking

52593, 108136, A63B 500, E02F 1522

Patent

active

044260768

ABSTRACT:
A tumbling board construction including a sheet of material of sufficient strength to support a mat or the like, preferably molded of plastic. The sheet has a generally rectangular periphery, an upper face and a lower face, and a plurality of stationary male and female interlocking devices are disposed about the periphery in alternating fashion and below the upper face. The interlocking devices are generally upwardly and downwardly directed. Identical sheets, through proper orientation, may be interlocked together to form a support for a tumbling mat.

REFERENCES:
patent: 1778927 (1930-10-01), Wright
patent: 1978075 (1934-10-01), Butterworth
patent: 3169757 (1965-02-01), Roder et al.
patent: 3406617 (1968-10-01), Randazzo
patent: 3650224 (1972-03-01), Petix et al.
patent: 3694983 (1972-10-01), Couquet
patent: 4054987 (1977-10-01), Forlenza
patent: 4274626 (1981-06-01), Grosser et al.

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