Passive capture slip-proof chain handling hook

Details Passive capture slip-proof chain handling hook Passive capture slip-proof chain handling hook

2006-05-16

2006-05-16

Kramer, Dean J. (Department: 3652)

Handling: hand and hoist-line implements

Hook, hoistline, or grab type

C294S082240

Reexamination Certificate

active

07044522

ABSTRACT:
A chain hook with no moving parts that is capable of passively capturing and supporting both sides of a given chain link. The hook is provided with dual support surfaces that support the link and prevent disengagement of the hook while under load. A horn between the support surfaces protrudes through the hooked link and contacts the adjacent link on the lighter loaded side of the hook. This prevents running of the chain that could result from differential loading on either side of the hooked chain link. The hook surfaces are designed to inhibit disengagement under low load conditions and to facilitate unassisted disengagement of the hook under no-load conditions.

REFERENCES:
patent: 273310 (1883-03-01), Rairigh
patent: 951463 (1910-03-01), Spears
patent: 1339986 (1920-05-01), Schmidt
patent: 1531770 (1925-03-01), Walker
patent: 2090897 (1937-08-01), Ray et al.
patent: 2630610 (1953-03-01), Lock
patent: 4416319 (1983-11-01), Hofmann
patent: 4515198 (1985-05-01), Labonville
patent: 4693097 (1987-09-01), Rivera

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