Clamping attachment for a lift truck having two pivoting arms

Details Clamping attachment for a lift truck having two pivoting arms Clamping attachment for a lift truck having two pivoting arms

1984-02-16

1986-03-04

Spar, Robert J.

Material or article handling

Elevator or hoist and loading or unloading means therefor

Grab

91189R, 294 88, 414621, 414911, B66C 142

Patent

active

045738580

ABSTRACT:
A clamping attachment with a hydraulically actuated pivoting long arm and a pivoting short arm. The hydraulic actuators are connected in parallel where both arms move simultaneously inwardly until one arm contacts a load and stops and the second arm will continue inwardly. A biasing valve insures that the long arm opens first before the short arm opens. The long arm is actuated by first and second crank links to provide maximum force at the open position. The short arm is pivotally connected closer to the center line of the frame than the long arm allowing the long arm to be positioned in the maximum force position, allows positioning of the load close to the frame center line and reduces travel of the long arm. A swivel connection in the hydraulic control system prevents operation of any arm in the down position. The frame of the clamp is asymmetrical.

REFERENCES:
patent: Re23694 (1953-08-01), Ehmann
patent: Re26369 (1968-04-01), Ellis
patent: 2475367 (1949-07-01), Avery
patent: 2560438 (1951-07-01), Guinn, Jr.
patent: 2815878 (1957-12-01), Vance
patent: 2874862 (1959-02-01), Farmer et al.
patent: 3407951 (1968-10-01), Faust et al.
patent: 3604745 (1971-09-01), Sinclair
patent: 3878769 (1975-04-01), Farmer
patent: 3896957 (1975-07-01), Sinclair
patent: 4127205 (1978-11-01), Farmer et al.
patent: 4177000 (1979-12-01), Weinert et al.
patent: 4227850 (1980-10-01), Farmer et al.
patent: 4248471 (1981-02-01), LaBounty
patent: 4349305 (1982-09-01), Wynn et al.
patent: 4435119 (1984-03-01), House

Affiliated with

Also associated with

Rating

Clamping attachment for a lift truck having two pivoting arms does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Clamping attachment for a lift truck having two pivoting arms, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Clamping attachment for a lift truck having two pivoting arms will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1592850