Ratchet pulley for tightening cords or ropes

Details Ratchet pulley for tightening cords or ropes Ratchet pulley for tightening cords or ropes

1997-11-19

2000-11-21

Matecki, Katherine

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

254371, 254374, B66D 130

Patent

active

061491330

ABSTRACT:
A ratchet-type tensioning mechanism for a rope or cord has a rotatable sheave with faces having improved outwardly extending serrations which include alternating primary and secondary projections. The secondary projections are located in valleys between pairs of primary projections. A releasable ratchet mechanism permits rotation of the sheave in one direction but not the other. The projections are positioned at regular intervals around the circumference of the sheave and located so that a primary projection on one face of the sheave faces a secondary projection in a valley on the opposite face of the sheave.

REFERENCES:
patent: D266828 (1982-11-01), Prete, Jr.
patent: 1185179 (1916-05-01), Chattaway
patent: 2802366 (1957-08-01), Borner
patent: 2967046 (1961-01-01), Ratcliff
patent: 4151980 (1979-05-01), Burton et al.
patent: 4185360 (1980-01-01), Prete, Jr. et al.
patent: 4542883 (1985-09-01), Rutzki
patent: 4639978 (1987-02-01), Boden
patent: 5368281 (1994-11-01), Skyba
patent: 5722640 (1998-03-01), Skyba

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