Fire escape – ladder – or scaffold – Means maintaining platform level on angularly movable support – Swingable support
Patent
1987-04-08
1991-05-21
Chin-Shue, Alvin C.
Fire escape, ladder, or scaffold
Means maintaining platform level on angularly movable support
Swingable support
254228, B66F 1104
Patent
active
050167316
ABSTRACT:
An aerial lift comprising a frame, an articulated boom including a first and second boom portions, a workman support structure mounted on the upper end of the second boom portion for pivotal movement relative thereto about a generally horizontal axis, and a mechanism for leveling the workman support structure throughout the range of movement of the first and second boom portions, the leveling mechanism including first and second sections of elongate material extending through the boom portions, a hydraulic assembly connected to the second section and including a hydraulic cylinder, a piston dividing the cylinder into first and second chambers, and a piston rod having one end fixedly connected to the piston, and a hydraulic accumulator communicating with one of the chambers.
REFERENCES:
patent: 2063802 (1936-12-01), Geary
patent: 2323352 (1943-07-01), Pitts
patent: 3023475 (1962-03-01), Yerby et al.
patent: 3049194 (1962-08-01), Brendel
patent: 3298663 (1967-01-01), Hextell
patent: 3302480 (1967-02-01), Puryear et al.
patent: 3326524 (1967-06-01), Taylor
patent: 4081055 (1978-03-01), Johnson
patent: 4360187 (1982-11-01), Chapman
patent: 4429763 (1984-02-01), Houck
patent: 4484732 (1984-11-01), Gould
patent: 4512436 (1985-04-01), Freudenthal et al.
Chin-Shue Alvin C.
Hi-Ranger, Inc.
LandOfFree
Articulated boom including tensioning apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Articulated boom including tensioning apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Articulated boom including tensioning apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-231050