Telescoping mast with zero clearance for refueling machine

Details Telescoping mast with zero clearance for refueling machine Telescoping mast with zero clearance for refueling machine

1995-04-24

1997-04-29

Brahan, Thomas J.

Traversing hoists

Boom or mast

Extensible by sliding sections

267158, 384 35, F16C 2502

Patent

active

056240473

ABSTRACT:
A telescoping mast with zero clearance which can be used in a fully automatic, relative positioning refueling machine. The telescoping mast consists of a series of nested tubes separated by spacers of unique design. Each spacer consists of an upper spacer assembly attached to the upper end of an inner tube segment nested in an outer tube segment and slidable inside the outer tube segment; and a lower spacer assembly attached to the lower end of the outer tube segment and slidable outside the inner tube segment. The spacer assemblies are preferably made of molded plastic, for example, polyethylene. Each spacer assembly is formed by a spacer ring and a plurality of corrugated members connected at one end to the spacer ring. The distal ends of the corrugated members of the upper spacer assembly contact the distal ends of respective ones of the corrugated members of the lower spacer assembly when the inner tube segment is in an extended position relative to the outer tube segment. Each of the corrugated members comprises a multiplicity of spacer blocks connected in series by a multiplicity of flexible beams. Bending of the flexible beams during compression of the spacer assemblies provides damping of the force produced upon impact when the inner tube segment drops relative to the outer tube segment, for instance, after the inner tube segment has been stuck and then slips relative to the outer tube segment.

REFERENCES:
patent: 3719403 (1973-03-01), Sung
patent: 4016688 (1977-04-01), Tiffin et al.
patent: 4168008 (1979-09-01), Granryd
patent: 5465854 (1995-11-01), Sturm et al.

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