Connection system for crane boom segments

Details Connection system for crane boom segments Connection system for crane boom segments

2011-06-07

2011-06-07

Mansen, Michael R (Department: 3654)

Traversing hoists

Having means facilitating assembly or disassembly

Of boom sections

C052S650100, C052S651050

Reexamination Certificate

active

07954657

ABSTRACT:
The boom includes at least a first and second boom segment each with a longitudinal axis and a first and second end, the second end of the first segment being coupled to the first end of the second segment, and at least one first connector on the second end of the first segment respectively mating with at least one second connector on the first end of the second segment. The first connector includes a first alignment surface and the second connector includes a second alignment surface that engages with the first alignment surface such that when the first and second alignment surfaces are fully engaged, the apertures through the extensions in the connectors are aligned such that a main pin can be inserted through the apertures of all extensions in the first and second mating connectors even if the boom segments are not axially aligned. In another aspect of the invention, the connectors include stop surfaces, and the placement of the stop surfaces on the connectors is such that, when identical boom segments are positioned such that a main pin can be inserted through the apertures in the extensions of the connectors on some chords of the boom segments, the stop surfaces cooperate to align the apertures in the extensions of the connectors on other chords when the stop surfaces contact one another.

REFERENCES:
patent: 2529454 (1950-11-01), Marcantonio
patent: 2975910 (1961-03-01), Conrad
patent: 3085695 (1963-04-01), Miller
patent: 5082128 (1992-01-01), Franzen et al.
patent: 5199586 (1993-04-01), Pech et al.
patent: 6213318 (2001-04-01), Walker
patent: 2006/0065616 (2006-03-01), Diehl
patent: 2008/0099421 (2008-05-01), Pech et al.
patent: 4402005 (1995-07-01), None
patent: 09156882 (1997-06-01), None
Brochure, “HC-238, 125-Ton Truck Crane” 3 pages (undated but prior to Nov. 29, 2007).

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