Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly – Tilts relative to base
Patent
1979-02-26
1980-06-24
Murtagh, John E.
Static structures (e.g., buildings)
Mechanism operated relatively movable shaft assembly
Tilts relative to base
52632, 212 55, 308 3R, E04H 1234, F16C 1700
Patent
active
042088470
ABSTRACT:
A structure is provided for adjusting the lateral displacement of an outer second boom relative to a first, or base boom which receives and supports the second boom for telescoping movement relative thereto. A box-like retainer structure is provided to receive a pair of wear blocks which project from the retainer structure on each side of the second boom and are adapted to slidingly engage the inner surface of the sides of the base boom. A pair of threaded adjustment blocks are provided, one block inwardly of and adjacent each wear block for retaining the wear blocks against the base boom. Each adjustment block is threadingly engaged with a separate bolt and the distal end of each bolt opposite the adjustment block is retained within a bore of an upstanding wall to prevent each bolt from moving laterally relative to the second boom but to permit rotation of the bolts. The box-like retainer structure prevents rotation and vertical displacement of the wear blocks and adjustment blocks so that when a bolt is rotated, the engaged adjustment block is moved longitudinally relative thereto to vary the lateral displacement of the adjacent wear block and hence the lateral displacement of the second boom relative to the first or base boom.
REFERENCES:
patent: 3171545 (1965-03-01), Knight
patent: 3398492 (1968-08-01), Nansel
patent: 3952466 (1976-04-01), Spain
patent: 4134236 (1979-01-01), Ott
patent: 4148531 (1979-04-01), Hornagold
Cramlet Charles
Gaura Charles F.
Volkman John C.
J. I. Case Company
Murtagh John E.
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