Implements or apparatus for applying pushing or pulling force – Portable implements or apparatus for tensioning flexible... – Including screw drive
Patent
1977-07-21
1980-09-02
Noland, Kenneth W.
Implements or apparatus for applying pushing or pulling force
Portable implements or apparatus for tensioning flexible...
Including screw drive
254270, A62B 114
Patent
active
042203155
ABSTRACT:
The present invention relates to an ordinary pulley whose pintle is born by a shell provided with a device for suspension from a fixed point and which is adapted to receive a handling or hauling rope, said shell further comprising an auxiliary braking system independent of the pulley, in which said rope is engaged only when the device is to be used as a rescue device for lowering persons, particularly injured or unconscious persons.
REFERENCES:
patent: 118172 (1871-08-01), Wethered
patent: 866516 (1907-09-01), Purdy
patent: 2649282 (1953-08-01), Fate, Jr.
patent: 3307832 (1967-03-01), Van Zelm et al.
Noland Kenneth W.
Societe Anonyme Dite: Establissements Catu S.A.
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