Apparatus for emergency conveyance of a human being disposed on

Handling: hand and hoist-line implements – Grapple – Pivoted jaws

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Details

294117, 294118, 294902, B66C 144

Patent

active

050784404

ABSTRACT:
Disclosed is an auxiliary conveyance apparatus for conveying a body to be conveyed very easily in case of emergency including intermediate parts of a pair of arm members, each having a gripping portion and an operating lever on both the ends, respectively, being turnably pivoted, and the arm members being urged by elastic member so that the gripping portions are brought close to each other. An operating member is slidably attached to the operating levers, and the pair of the operating levers are opened and closed according to the distance from the gripping portions, and cooperatively with this closing and opening of the operating levers, the gripping force in the gripping portions is controlled. The operating member is anchored to a tractor through an anchoring device, and the position of the operating member relative to the operating levers is determined according to the balance between the tractive force acting on the operating member and the weight of the body to be conveyed and the gripping force in the gripping portions is controlled. An extension is provided on one operating arm member whereby a hand-applied force moving the extension toward the other arm member will oppose the urging force of the elastic member and allow selective engagement to the movable body.

REFERENCES:
patent: 306067 (1884-10-01), Durning
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patent: 433756 (1890-08-01), Wilson
patent: 504600 (1893-09-01), Manning et al.
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patent: 1381813 (1921-06-01), Engevik
patent: 2295768 (1942-09-01), Williamson
patent: 2668733 (1954-02-01), Boticki
patent: 4098533 (1978-07-01), Hanlon
patent: 4421353 (1983-12-01), Smith
patent: 4678217 (1987-07-01), Viola et al.

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