Lightning resistant hydrological pulley

Details Lightning resistant hydrological pulley Lightning resistant hydrological pulley

1999-06-11

2000-11-07

Walsh, Donald P.

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

254416, 254902, B66D 304

Patent

active

061424501

ABSTRACT:
A lightning resistant hydrological pulley comprising an insulator between a pulley body and an axle insert. The insulator is made of electrically non-conductive material, thereby denying lightning surges an electrical path from the pulley body to an axle disposed within the axle insert. Set screws angularly immobilize the pulley body relative to the insulator, and the insulator relative to the axle insert and relative to an axle disposed within the axle insert. In the preferred embodiment, the insulator is made of synthetic material such as white Delrin, and the pulley body and the axle insert are made of brass.

REFERENCES:
patent: 487491 (1892-12-01), Nock
patent: 1132168 (1915-03-01), Davidson
patent: 1160364 (1915-11-01), Baekeland
patent: 1177046 (1916-03-01), Nice
patent: 2117084 (1938-05-01), Elmes
patent: 2806380 (1957-09-01), Martin
patent: 3830478 (1974-08-01), Pietroni
patent: 3872793 (1975-03-01), Patin
patent: 5154401 (1992-10-01), Schramm et al.
patent: 5307672 (1994-05-01), Macchiarulo et al.

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