Static structures (e.g. – buildings) – Disparate sheet lamina between exposed surfaces of wall,... – Tie crossing dividing lamina
Patent
1991-05-28
1992-12-08
Ridgill, Jr., James L.
Static structures (e.g., buildings)
Disparate sheet lamina between exposed surfaces of wall,...
Tie crossing dividing lamina
411542, E04D 336, F16J 1510
Patent
active
051686848
ABSTRACT:
A pair of plates are interposed between the head of a screw means fastened through a roof covering and into a roof surface and truss therebelow. One plate is a lock nut composed of ratchet toothed means fixed to and facing downwards of the screw head and the second plate is a disc-shaped member fixed to the sheath of the roof covering and has ratchet teeth facing upwards and engageable with the teeth of the screw lock nut member when the screw is mated with the disc-shaped member.
REFERENCES:
patent: 629699 (1899-07-01), McQueen
patent: 4034788 (1977-07-01), Melone
patent: 4757661 (1988-07-01), Hasan
patent: 4799845 (1989-01-01), Hrysko
patent: 5018329 (1991-05-01), Hasan et al.
Hill K. Maxwell
Ridgill, Jr. James L.
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