Sheave block and seal assembly therefor

Details Sheave block and seal assembly therefor Sheave block and seal assembly therefor

1979-02-02

1980-12-23

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

308 361, 254416, B66D 136

Patent

active

042406145

ABSTRACT:
A seal assembly and a sheave block utilizing said assembly in which a housing (H) mounts a central shaft (12) on which a plurality of sheaves (40-43) are rotatably mounted. A free-floating spacer ring (60) is positioned on the central shaft between each of the sheaves and between a sheave and the housing and has a hard wearing smooth surface as provided by chrome-plating, and a pair of lip seals (62,63) of elastic material are positionable, one on each face of a sheave and an adjacent surface of the housing, with each having a part (64,65) thereof defining a hard wearing low friction bearing surface for sealing engagement with the surface of the spacer ring.

REFERENCES:
patent: 511766 (1894-01-01), Ferrall
patent: 1642979 (1927-09-01), Timbs et al.
patent: 1880608 (1932-10-01), Venable
patent: 2272826 (1942-02-01), Bardsley
patent: 2282633 (1942-05-01), Young
patent: 2736585 (1956-02-01), Riesing
patent: 3561776 (1971-02-01), Wilson
patent: 3810637 (1974-05-01), Bonvin
patent: 4166627 (1979-09-01), Bainard

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