Lifting rudder

Details Lifting rudder Lifting rudder

1996-10-22

1998-10-13

Kramer, Dean

Handling: hand and hoist-line implements

Spacing hoist bar or frame

Adjustable to accommodate different size loads

294 813, 294 8156, B66C 110

Patent

active

058201840

ABSTRACT:
A lifting rudder device consists of a standard I-beam (1), a hanging element (2) and two suspension elements (3). The suspension elements (3) are slid onto the lower flank (12) of the beam (1), and each consists of two parallel plates (30) formed of a central hollow in the form of a `T` into which passes the lower flank (12) and the core (10) of the beam (1). The plates (30) are solidified by two pendulums (37), each pierced by a hole (38) into which a pin passes levelly crossing the core (10) of the beam by one of the holes (16) along its length. The lower edge (39) of each of these pendulums (37) rests on the internal face (15) of the lower flank (12). The lower edge (39) includes a central curved part concentric to the hole (38) of the pendulum (37) and two flat ends, tangent to the central curved part.

REFERENCES:
patent: 3343861 (1967-09-01), Sinicki
patent: 3547478 (1970-12-01), Pradon
patent: 3561810 (1971-02-01), Newsted
patent: 4128267 (1978-12-01), Niblett et al.
patent: 4626012 (1986-12-01), Weldele
patent: 4973795 (1990-11-01), Sharpe

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