Traversing hoists – Having vertically swinging boom
Patent
1992-07-21
1995-04-04
Huppert, Michael S.
Traversing hoists
Having vertically swinging boom
212175, 212229, 212232, 212261, B66C 2306, B66C 2362
Patent
active
054028981
ABSTRACT:
A truck mounted crane assembly includes a turntable lock, a boom rest which interacts with the piston and cylinder device, and a swing away hoist mount. The turntable lock includes a pin which is manually retractable upon rotation of a handle from a position preventing relative rotation between a turntable and a pedestal to a position allowing such relative rotation and which can be secured in the first and second positions. The boom rest is mounted on the boom and rests on the cylinder of the piston and cylinder device when the boom is lowered to a predetermined position, thus taking much of the pressure off the piston. The boom rest is movable from a position in which it is capable of supporting the boom to a position in which it is incapable of supporting the boom and in which the boom is thus lowerable below the predetermined position. The provision of the turntable lock and boom rest obviates the need for a cradle rest for the boom. Finally, the hoist mount receives the hoist, is connected to the boom, and is movable under actuation of the hoist or telescoping of the end of the boom from a first, working position to a second position allowing access to the interior of the front end of the boom.
REFERENCES:
patent: 1751794 (1930-03-01), Crandall
patent: 1800379 (1931-04-01), Davis
patent: 3545628 (1970-12-01), Dechanstsreker
patent: 3648956 (1972-03-01), Paulson et al.
patent: 3664515 (1972-05-01), Orendorff et al.
patent: 3792778 (1974-02-01), Sholl et al.
patent: 3964614 (1976-06-01), Welch
patent: 4039093 (1977-08-01), Schmitz, Jr. et al.
patent: 4189278 (1980-02-01), Dewey
patent: 4411070 (1983-10-01), Boyum et al.
patent: 4579235 (1986-04-01), Orwig
patent: 4856662 (1989-08-01), Marvin et al.
patent: 4982853 (1991-01-01), Kishi
patent: 5054990 (1991-10-01), Schaeff
patent: 5211297 (1993-05-01), Vandervalk
Huppert Michael S.
JLG Industries Inc.
Johnson R. B.
LandOfFree
Crane having boom rest does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Crane having boom rest, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Crane having boom rest will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2375798