Scaffold bracket

Details Scaffold bracket Scaffold bracket

1974-10-15

1976-07-20

Foss, J. Franklin

Supports

Brackets

Shelf or scaffold type

182136, A47B 4700

Patent

active

039702774

ABSTRACT:
An improved self-locking scaffold bracket employing a load activated lock in combination with a foot operated hoisting device which may be hoisted without lost motion relative to the support. The scaffold bracket utilizes a rigid frame directly supported upon a lock which clamps to an upright post. The scaffold can be raised by a hoisting device of the block and tackle type or by a foot operated hoisting mechanism of the type which "walks" up the post. The hoisting device engages the lock in a manner causing the lifting force to be exerted at a trunnion axis of the lock which is so situated that it eliminates lost motion and tilting during the hoisting operation.

REFERENCES:
patent: 1416296 (1922-05-01), Hoitsma
patent: 1441806 (1923-01-01), Hoitsma
patent: 2038899 (1936-04-01), Hoitsma
patent: 2216912 (1940-10-01), Hoitsma
patent: 2854293 (1958-09-01), Riblet
patent: 3473774 (1969-10-01), Riblet

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