Gymnastic floor structure having vertical elasticity

Details Gymnastic floor structure having vertical elasticity Gymnastic floor structure having vertical elasticity

1985-06-25

1987-03-10

Hafer, Robert A.

Undertaking

52228, 52480, 52582, 446111, 428 17, 428 95, A63J 300, E04B 543

Patent

active

046485929

ABSTRACT:
A gymnastic floor structure comprising a panel board assembly, lower floor members spacedly secured to the bottom of the panel board assembly and placed on the gymnasium base floor, an upper floor member, and tighteners which prevent panels of the board assembly from loosening in the connecting directions, wherein the lower floor members are made of synthetic resin foam, the connectors have an almost I-shaped cross section composed of two U-shaped channels integrated back to back, one channel of the connectors is used as a fitting part between two adjacent panels, the fixing part of the connectors is fitted to the side edge portion of one unit panel board and secured with fasteners, and the fitting part is fitted to the side edge portion of the other unit panel board. The upper floor member is an elastic mat and carpet which covers the panels. The lower floor members and elastic mat are made of ethylene vinyl acetate resin foam modified by ethylene propylene rubber and butadiene rubber having an impact resilience of 50 to 60%.

REFERENCES:
patent: 1246585 (1917-11-01), Geraerdts
patent: 1398852 (1921-11-01), Gilbert
patent: 2025794 (1935-12-01), Venzie
patent: 2142305 (1939-01-01), Davis
patent: 3604173 (1971-09-01), Dahlborg
patent: 3771891 (1973-11-01), Nirenski et al.
patent: 3786011 (1974-01-01), Price et al.
patent: 4109039 (1978-08-01), McCoy
patent: 4307879 (1981-12-01), McMahon et al.
patent: 4373033 (1983-02-01), Gupta
patent: 4501420 (1985-02-01), Dury

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