Implements or apparatus for applying pushing or pulling force – Apparatus for hauling or hoisting load – including driven... – With rotatable – cable contacting – pulley wheel element...
Patent
1984-08-07
1986-04-29
Levy, Stuart S.
Implements or apparatus for applying pushing or pulling force
Apparatus for hauling or hoisting load, including driven...
With rotatable, cable contacting, pulley wheel element...
254394, 254399, B66D 308, B66C 2360
Patent
active
045852138
ABSTRACT:
Well derrick in which the travelling crown block is operated by hydraulically operated linear actuators and a travelling block is operated by special reeving, the arrangement advantageously being such that the loads being handled bypass the tower of the derrick so that the cost of the tower can be reduced. The reeving system results not only in uniform and symmetrical force distribution relative to the crown block and travelling beam but also in a travel of the travelling beam twice the stroke of the linear actuators.
REFERENCES:
patent: 1973197 (1934-09-01), Baker
patent: 3474924 (1969-10-01), Wheeler
patent: 3653635 (1972-04-01), Bates
patent: 3792836 (1974-02-01), Bender
patent: 3940111 (1976-02-01), Castela
patent: 4128229 (1978-12-01), Elliston
patent: 4341373 (1982-07-01), Mouton
Slagle, Jr. Grady M.
Swaim Raymond J.
Armco Inc.
Levy Stuart S.
Matecki Katherine
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