Material or article handling – Vertically swinging load support – Shovel or fork type
Patent
1992-02-19
1993-08-10
Huppert, Michael S.
Material or article handling
Vertically swinging load support
Shovel or fork type
91182, 91189A, 91513, 91534, F02F 300
Patent
active
052343120
ABSTRACT:
A loading vehicle has a boom pivotally mounted thereon for movement in a vertical plane, the boom supporting a loading unit at its distal end. A fluid control system includes a boom cylinder for raising and lowering the boom, a loading unit cylinder for tilting the loading unit relative to the boom, a tank for holding fluid and a pump for selectively pumping fluid to the cylinders through manually controlled selector valves. The loading unit attitude is controlled by a system including a bypass valve, a flow splitting valve and a boom position detector for actuating the bypass valve. Fluid forced from a lowering chamber of the boom cylinder as the boom is raised is applied to the bypass valve. As long as the boom is in a position falling within a lower range of positions the boom position detector does not actuate the bypass valve and all fluid from the lowering chamber is diverted to the tank. When the boom moves out of the lower range of positions the detector actuates the bypass valve and it diverts all fluid from the lowering chamber to the flow splitting valve which splits the flow. A first split flow is returned to the tank and a second split flow is applied to a lowering chamber of the loading unit cylinder to tilt the loading unit relative to the boom as the boom is raised.
REFERENCES:
patent: 3032215 (1962-05-01), French et al.
patent: 3133653 (1964-05-01), Anderson
patent: 3251277 (1966-05-01), Stacey
patent: 3872990 (1975-03-01), York
Huppert Michael S.
Toyo Umpanki Co., Ltd.
Underwood Donald W.
LandOfFree
Loading unit attitude control system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Loading unit attitude control system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Loading unit attitude control system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1721315