Single line multiple purchase block and tackle system

Details Single line multiple purchase block and tackle system Single line multiple purchase block and tackle system

1994-04-21

1996-07-23

Hail, III, Joseph J.

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

254391, 254415, B66D 308

Patent

active

055382231

ABSTRACT:
A block and tackle system having two different purchases is operated from a single line. The system includes a primary purchase system and a secondary system having a higher purchase than the primary system. The primary and secondary systems are separated by a one-way block, and the secondary system is connected back to a floating block in the primary system. The secondary system is activated upon initial ease of the line from any given position, with the one-way block locking the line in the ease direction.

REFERENCES:
patent: 889488 (1908-06-01), Smith
patent: 1381011 (1921-06-01), Quick
patent: 3714838 (1973-02-01), Gilson
patent: 3794185 (1974-02-01), Kroll et al.
patent: 4084794 (1978-04-01), Wallace
patent: 4721286 (1988-01-01), Hey et al.

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