Portable folding crane

Details Portable folding crane Portable folding crane

1988-11-18

1990-05-15

Basinger, Sherman D.

Traversing hoists

Having means facilitating assembly or disassembly

Of traversing hoist from support

212189, 212261, 212265, B66C 2348

Patent

active

049250396

ABSTRACT:
A portable folding crane which includes an elongated base member having first and second axial extremities and first and second elongated telescoping legs. Each of the legs has first and second axial extremities and each of the first axial extremities is pivotally connected proximate to respective axial extremities of the base member. A telescoping column member has first and second axial extremities and the first axial extremity of the telescoping column member is pivotally connected to the base member. A boom member has first and second axial extremities and the second axially extremity of the telescoping column member being the first axial extremity of the boom member are pivotally connected. Apparatus for urging the boom member to pivot with respect to the column member is also provided.

REFERENCES:
patent: 2706120 (1955-04-01), Stratton
patent: 3145857 (1964-08-01), Hayman et al.
patent: 3275296 (1966-09-01), Meyer
patent: 3367512 (1968-02-01), Kaplan
patent: 4144973 (1979-03-01), Reale
patent: 4508233 (1985-04-01), Helm
patent: 4770304 (1988-09-01), Woods

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