High speed safety block assembly

Details High speed safety block assembly High speed safety block assembly

2005-12-06

2005-12-06

Marcelo, Emmanuel M (Department: 3654)

Implements or apparatus for applying pushing or pulling force

Device or member for contacting and guiding moving cable

Including rotatable, cable contacting, pulley wheel element

C254S399000, C254S402000, C254S416000

Reexamination Certificate

active

06971636

ABSTRACT:
A high speed safety block assembly includes a first and second cheek plates with a sheave and axle installed between the cheek plates. The cheek plates each have a recessed area on their inner surfaces and have interlocking ears which increase the safety of the block assembly by preventing the block assembly from coming apart in the event of a screw failure. The sheave of the high speed safety block assembly includes a needle bearing which rolls on the bearing surface of the axle, permitting much higher loads and speeds when the high speed safety block assembly is used.

REFERENCES:
patent: 811191 (1906-01-01), Whiteside
patent: 973177 (1910-10-01), Davis et al.
patent: 1662320 (1928-03-01), McKissick
patent: 2762607 (1956-09-01), Anderson
patent: 5056760 (1991-10-01), Jorgensen
patent: 5154401 (1992-10-01), Schramm et al.
patent: 5538224 (1996-07-01), Powell et al.

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