Self-leveling linkage assembly for material handling equipment

Details Self-leveling linkage assembly for material handling equipment Self-leveling linkage assembly for material handling equipment

1982-06-21

1984-02-14

Spar, Robert J.

Material or article handling

Vertically swinging load support

Shovel or fork type

414706, B66C 2300

Patent

active

044313640

ABSTRACT:
A self-leveling linkage assembly for maintaining a bucket in a level condition and for preventing the bucket from being rolled rearwardly beyond a predetermined maximum rollback position as the lift arm for the bucket is moved to an extreme raised position. The self-leveling linkage assembly includes a control arm rotatably mounted to a tractor frame at a location forwardly of the lift arm pivot, a position link connected between the control arm and bucket, a control valve for actuating a bucket cylinder, and a linkage connected between the control valve and a manually operable control handle. If the bucket rolls back beyond a predetermined position, the position link causes the control arm to rotate which in turn actuates the control valve for the bucket cylinder thereby rolling the bucket to a level position. When the hydraulic system is inoperative and the lift arm is left in an extreme raised position, a portion of the control arm is adapted for engagement with the lift arm pivot to resist movement of the bucket rearwardly thereby preventing damage to the self-leveling linkage elements. Further, a spring relief assembly is provided in the control valve linkage to prevent the operator from interfering with the operation of the self-leveling linkage assembly.

REFERENCES:
patent: 2811265 (1957-10-01), Wagner
patent: 3180504 (1965-04-01), Gruben et al.
patent: 3730362 (1973-05-01), Hurlburt et al.

Affiliated with

Also associated with

Rating

Self-leveling linkage assembly for material handling equipment does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Self-leveling linkage assembly for material handling equipment, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Self-leveling linkage assembly for material handling equipment will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2372747