Extension and retraction means for the telescopic boom assembly

Details Extension and retraction means for the telescopic boom assembly Extension and retraction means for the telescopic boom assembly

1975-12-15

1977-07-19

Spar, Robert J.

Traversing hoists

With haul-in line

52118, 212 46B, 212 55, B66C 2370

Patent

active

040363724

ABSTRACT:
Means for extending and retracting the telescoping boom assembly of a rotatable mobile crane wherein the boom assembly comprises a plurality of telescoping parts, slidably received one into the other. The boom extension and retraction means is operable at any angular displacement of the boom assembly, the operating angle of the boom assembly being maintained during the extension or retraction thereof. Means for extending and retracting the boom assembly include a single fluid driven linear motor or hydraulic cylinder suitably attached at one end portion of the motor to a base portion of the boom assembly. An opposite end portion of the linear motor is selectively securable to the telescoping sections of the boom assembly to permit extension thereof. A cylinder guide is mounted on the fluid driven linear motor, both the cylinder guide and motor contained within the boom assembly, the cylinder guide providing support for the linear motor and maintaining the alignment of the extension and retraction means. The extension and retraction means also includes a single latch mechanism comprising first latching means for extension and retraction of the telescoping boom sections of the boom assembly, and second latching means for locking the boom assembly in position.

REFERENCES:
patent: 3361456 (1968-01-01), Durand
patent: 3631988 (1972-01-01), Noly
patent: 3670465 (1972-06-01), Cheze
patent: 3688455 (1972-09-01), Zebuhr
patent: 3738075 (1973-06-01), Nansel

Affiliated with

Also associated with

Rating

Extension and retraction means for the telescopic boom assembly does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2289393