Undertaking
Patent
1976-08-26
1978-04-11
Apley, Richard J.
Undertaking
A63J 500
Patent
active
040835570
ABSTRACT:
A karate practice board for subjection to hand and foot strikes, simulates frangibility and permits reassembly by means of a multi-component structure that is characterized by a special tongue and groove relationship.
The practice board is made of first and second parts, the parts being along a longitudinal edge thereof by a tongue and groove joint. The first part having a tongue and groove configuration along one of its edges and the second part having a tongue and groove configuration along one of its edges. The configuration of the parts are seen to be a mirror image of each other when the parts are joined by the configuration to form the board. The strength of the material of the board is such that shattering of the parts along the mating edge is avoided when the parts are separated as a result of impact by a user.
REFERENCES:
patent: 3032919 (1962-05-01), Amsler
patent: 3973772 (1976-08-01), Milliken
patent: 4004799 (1977-01-01), Kundert
Apley Richard J.
Brown T.
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