The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 28, 1983
Filed:
Jun. 14, 1982
Carl A Merry, Marion, MA (US);
Schaefer Marine, Inc., New Bedford, MA (US);
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.