Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support
Patent
1982-05-24
1984-12-04
Rolla, Joseph J.
Elevator, industrial lift truck, or stationary lift for vehicle
Stationary lift for roadway vehicle or required component...
Having specific drive means for support
254386, B66B 920
Patent
active
044858949
ABSTRACT:
A power-up and power-down mast and carriage assembly for a lift truck of the type having a stationary mast section fixed to the truck, a movable inner mast section reciprocable within the stationary mast, a fork carriage movably associated with the inner mast section, a double-acting hydraulic ram having an extensible and retractable cylinder and piston rod assembly operatively connected between said mast sections for extending and retracting the inner mast section relative to the stationary mast section. Lost-motion couplings interconnect both power-up and power-down chains with the stationary mast and carriage in a closed loop chain rigging system. The lost-motion couplings each have a rod slidably through the interconnection with the carriage and stationary mast, and spaced stops operable to limit travel of the rod to a predetermined distance. Coil springs connected to the rod yieldably bias the chains so as to exert tension thereon in a direction opposite to the load forces imposed on the chains by the ram. The lost-motion predetermined travel distance preferably is equal to the sum of the travel of the lost-motion coupling of the powered chains during initial application of ram-applied forces thereto plus the maximum elongation of the powered chains under maximum rated load so that the non-powered chains are always maintained in taut condition in both power-up and power-down modes of operation of said mast.
REFERENCES:
patent: 1964273 (1934-06-01), Remde
patent: 1991576 (1935-02-01), Remde
patent: 2261930 (1941-11-01), Abbe
patent: 2569126 (1951-09-01), Daniels
patent: 2787338 (1957-04-01), Quayle
patent: 3042149 (1962-07-01), Comfort
patent: 3225867 (1965-12-01), Inghram
patent: 3302810 (1967-02-01), Heidrick
patent: 3390797 (1968-07-01), Goodacre et al.
patent: 3407950 (1968-10-01), Ward et al.
patent: 3561621 (1978-02-01), Rivers, Jr.
patent: 3563341 (1971-02-01), Bultman
patent: 3710424 (1973-01-01), Smejkal et al.
patent: 3710965 (1973-01-01), Joosten
patent: 3799379 (1974-03-01), Grether et al.
patent: 3826393 (1974-07-01), Carroll
patent: 3908849 (1975-09-01), Carroll
patent: 3972388 (1976-08-01), McVeen
patent: 4061237 (1977-12-01), Austin et al.
"On-Board Lift Truck Adds Value to Beer Distribution", by Wolfgang Nordhorn.
Modern Materials Handling/Jun. 1977-373-376.
Soule Eugene A.
Taylor William L.
Walker Robert H.
Rolla Joseph J.
Shaver Kevin P.
The Knickerbocker Company
LandOfFree
Lift truck mast and carriage 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 Lift truck mast and carriage assembly, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lift truck mast and carriage assembly will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1578307