Martial arts board

Details Martial arts board Martial arts board

1991-10-11

1993-03-23

Thomas, Alexander S.

Stock material or miscellaneous articles

Sheets or webs edge spliced or joined

Sheets or webs coplanar

428 58, 428192, 482 83, B32B 306

Patent

active

051962497

ABSTRACT:
A reusable martial arts board comprises two interconnecting and symmetrical half-sections. Along the interconnecting edge of each section a plurality of alternating projections and cavities are shaped and dimensioned to intimately engage a matching row of similar projections and cavities on the opposite board. Each cavity has a slot in its lower section, and each projection has a corresponding radial groove. When a load is applied at the junction of the board being held at opposite ends, the slots expand while the grooves constrict to facilitate the separation of each extension from its nesting cavity.

REFERENCES:
patent: 3973772 (1976-08-01), Milliken
patent: 4497858 (1985-02-01), Dupont et al.
patent: 4842905 (1989-06-01), Stech

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