Marine block

Details Marine block Marine block

1982-06-14

1983-06-28

Jillions, John M.

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

308190, B66D 136

Patent

active

043901638

ABSTRACT:
A marine block employs a sheave which is rotatively mounted on an axle supported between a pair of spaced-apart cheek plates. One or more ball bearing units are provided between the axle and the sheave, each unit containing a circular array of ball bearings which engage in circular races which are disposed radially outward from the axis of the axle. Relatively large ports are formed in the cheek plates which are located directly opposite the bearing units whereby a water stream directed through the ports at one side of the block can penetrate around and between the exposed ball bearings and their races and scrub those surfaces free of dirt and film. In a preferred block embodiment, clearance spaces exist radially inboard of the sheave between the bearing units and between the sheave and the cheek plates so that water can travel directly through the block and between the sheave and the cheek plates to further facilitate cleaning the block.

REFERENCES:
patent: 817074 (1906-04-01), LaRose
patent: 1185179 (1916-05-01), Chattaway
patent: 1185535 (1916-05-01), Purdy
patent: 1574799 (1926-03-01), Dierks
patent: 1713587 (1929-05-01), Wright
patent: 2408899 (1946-10-01), Wright
patent: 3528645 (1970-09-01), Harken

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