Rolling safety trolley

Details Rolling safety trolley Rolling safety trolley

1983-08-18

1988-09-27

Machado, Reinaldo P.

Fire escape, ladder, or scaffold

Traversing, track-mounted

With vertically spaced second track

182142, E04G 310, E04G 316

Patent

active

047735040

ABSTRACT:
A rolling safety trolley for traversing the upper circumference of an open tank having a top ledge comprises: a frame having an upright member and at least one cross member, and preferably a plurality of cross members, an outer wall roller affixed to the extremity of each of said crossmembers and adapted to engage and roll along the outer wall surface of said tank, a hooked member affixed to the uppermost portion of said upright member, a top ledge roller affixed to said hook member and adapted to engage and roll along said top ledge, and an inner wall roller affixed to said hook member and adapted to engage and roll along the inner wall of said tank.

REFERENCES:
patent: 434709 (1890-08-01), Himelberger
patent: 572576 (1896-12-01), Sjolander
patent: 654780 (1900-07-01), Burchill
patent: 1421609 (1922-07-01), Sturm et al.
patent: 1423998 (1922-07-01), Camp
patent: 1477494 (1923-12-01), Hutchison
patent: 1909742 (1933-05-01), Bone
patent: 2396127 (1946-03-01), Riblet
patent: 2761396 (1956-09-01), Harlan
patent: 2854292 (1958-09-01), Schaeffer
patent: 3114433 (1963-12-01), Downs
patent: 3124213 (1964-03-01), Jorsey
patent: 3491851 (1970-01-01), Dutcher
patent: 3620331 (1971-11-01), Shaw
patent: 4137996 (1979-02-01), Brown

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