Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly – Fluid pressure actuated
Patent
1981-12-14
1984-10-23
Perham, Afred C.
Static structures (e.g., buildings)
Mechanism operated relatively movable shaft assembly
Fluid pressure actuated
52118, 52632, E04H 1234
Patent
active
044780141
ABSTRACT:
A telescopic boom is disclosed having a plurality of generally tubular boom sections each having its corners defined by angled corner plates converging upwardly and inwardly at equal angles relative to a central vertical plane containing the longitudinal axes of all boom sections when properly aligned. Boom shoes secured to the outer surfaces and near the inner ends of the angled corner plates of all boom sections except the largest section slidably engaging the adjacent angled corner plates of the next larger boom section; and similar boom shoes secured to the inner surfaces of the angled corner plates near the outer end of all boom sections except the smallest section slidably engaging the outer angled surfaces of the next smaller section. The lower outer shoes and the upper shoes cooperate with their associated angles corner surfaces to define inclined planes which maintain the longitudinal axes of the boom sections horizontally aligned with the vertical plane when the tip section is loaded and is subjected to a side force.
REFERENCES:
patent: 301019 (1884-06-01), Teal
patent: 2684159 (1954-07-01), Oldenkamp
patent: 2763342 (1956-09-01), French
patent: 2920725 (1960-01-01), Emmons
patent: 3196990 (1965-07-01), Handley
patent: 3495370 (1970-02-01), Halbro et al.
patent: 3571991 (1971-03-01), Doocy et al.
patent: 3610433 (1971-10-01), Milner et al.
patent: 3708937 (1973-01-01), Sterner
patent: 3802136 (1974-04-01), Eiler et al.
patent: 3952466 (1976-04-01), Spain
patent: 3985234 (1976-10-01), Jouffray
patent: 4003168 (1977-01-01), Brady
patent: 4038794 (1977-08-01), Young
patent: 4171597 (1979-10-01), Lester et al.
patent: 4257201 (1981-03-01), Landolt et al.
patent: 4352434 (1982-10-01), Poock
patent: 4357785 (1982-11-01), Eklund
Poock Darwin N.
Volkmann Thomas J.
FMC Corporation
Kamp R. C.
Megley R. B.
Moore A. J.
Perham Afred C.
LandOfFree
Telescopic boom with angled corner construction does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Telescopic boom with angled corner construction, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Telescopic boom with angled corner construction will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1592406