E - Fixed Constructions – 02 – F
Patent
E - Fixed Constructions
02
F
E02F 3/43 (2006.01) E02F 9/22 (2006.01) F15B 1/02 (2006.01) F15B 11/00 (2006.01) F15B 20/00 (2006.01)
Patent
CA 2433120
A tractor-mounted front end loader includes lift boom having a tool, disclosed as a bucket, pivotally mounted to one end of the boom for selected movement by one or more hydraulic adjustment cylinders. A safety valve is associated with one of the pressure chambers of each adjustment cylinder to prevent unintended lowering of the tool in the event a supply-return hose extending between a direction control valve and the adjustment cylinder should rupture. Also connected to this pressure chamber of each adjustment cylinder is an accumulator for providing a damping action. The connection between the pressure chamber and the accumulator is made by rigid tubing, and in one disclosed embodiment, includes a remotely operable on/off valve for selectively coupling the accumulator to the pressure chamber.
Berthod Emmanuel
Ostermann Philippe
Borden Ladner Gervais Llp
Deere & Company
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