Mobile crane

Details Mobile crane Mobile crane

1992-02-28

1993-05-18

Werner, Frank E.

Material or article handling

Self-loading or unloading vehicles

Loading or unloading by other carrier or mover means, and...

414462, 414543, 414718, 224273, 212238, 212242, 212244, 212189, 2804151, B60P 154

Patent

active

052115267

ABSTRACT:
A modular, readily assembled crane for mounting on a vehicle trailer hitch drawbar and reconfigurable for stand alone, rollabout operation. A receptacle rotatably supports a vertical column, boom arm, and lifting device, which may be a hydraulic jack or a winch. The receptacle has a lateral projection cooperating with the drawbar and two lateral projections to engage outriggers to steady the device and to support weight. The outriggers may be omitted. The same three projections, when reconfiguring the crane to rollabout operation, cooperate with a readily built up frame riding just above a floor, supported on casters. Rollabout frame length, boom arm angle, boom arm length, and outrigger height are adjustable. A non-lubricated PTFE washer serves as a rotating bearing. Optional parts include a receiving unit mountable to a vehicle in the absence of a trailer hitch, and a similar unit mountable to a wall surface.

REFERENCES:
patent: 3784035 (1974-01-01), Dunbar
patent: 4069922 (1978-01-01), Hawkins
patent: 4508233 (1985-04-01), Helms
patent: 4527935 (1985-07-01), Fortenberry
patent: 4710090 (1987-12-01), DeLuca et al.
patent: 4881864 (1989-11-01), Amato
patent: 5029740 (1991-07-01), Cox
Clip-on Loader-Mechanical Handling-Apr. 1970-p. 197.

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