Cavity back iron with vibration dampening material in rear cavit

Details Cavity back iron with vibration dampening material in rear cavit Cavity back iron with vibration dampening material in rear cavit

1993-04-12

1994-03-01

Millin, Vincent

Amusement devices: games

Puzzles

Take-aparts and put-togethers

273167H, 273DIG8, A63B 5304

Patent

active

052900363

ABSTRACT:
A cavity back iron with vibration dampening material in the cavity. The material is a polyurethane having a hardness of 20-50 Shore D, a flexural modulus of 1,000-50,000 p.s.i., a percent elongation of 100-600, and a tensile strength of 2,000-8,000 p.s.i.

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patent: 4653756 (1987-03-01), Sato
patent: 4740345 (1988-04-01), Nagasaki et al.
patent: 4936582 (1990-06-01), Bernstein
patent: 4964640 (1990-10-01), Nakanishi
patent: 5178392 (1993-01-01), Santioni
patent: 5244211 (1993-09-01), Lukasiewicz

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