Extensible boom for cranes

Details Extensible boom for cranes Extensible boom for cranes

1978-04-24

1981-03-31

Kunin, Stephen G.

Traversing hoists

Having vertically swinging boom

Extensible by movement of boom or boom segment along...

212231, 212265, 212268, 52118, 52115, B66C 2306, B66C 2362

Patent

active

042588537

ABSTRACT:
A telescopic boom is pivotally mounted on a frame of a vehicle and comprises telescopically disposed first, second, third and fourth sections. A double-acting cylinder has a rod thereof connected to the first section and a housing thereof connected to the second section. A first pulley is rotatably mounted on a forward end of the cylinder housing and a second pulley, having a larger diameter than the first pulley, is rotatably mounted on a rearward end of the cylinder housing. A first end of a cable is secured to the first section and is sequentially entrained over the first pulley, secured to the third section, entrained over the second pulley and has a second end thereof secured to a forward end of the first section. Thus, extension of the cylinder will function to extend the second section relative to the first section and simultaneously extend the third section at twice the linear speed as that of the second section. The fourth section of the boom is adapted to have a rearward end thereof connected to a forward end of the third section to substantially increase the overall working length thereof.

REFERENCES:
patent: 3462023 (1969-08-01), Grove
patent: 3752327 (1973-08-01), Olson
patent: 4098172 (1978-07-01), Wright et al.
patent: 4132040 (1979-01-01), Grove
patent: 4133411 (1979-01-01), Curb

Affiliated with

Also associated with

Rating

Extensible boom for cranes does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Extensible boom for cranes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Extensible boom for cranes will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2239180