Patent ID: 9267263
Filing Date: 2016-02-23
CPC Classification: A01B,B62D,E02F,F15B

Claim Text:
1. In a front loader arrangement ( 12 ) including a mounting frame ( 16 ) and a mounting mast ( 18 ), wherein the mounting mast ( 18 ) can be coupled to the mounting frame ( 16 ) and can be decoupled therefrom, a front loader arm ( 20 ) having a rear end connected to the mounting mast ( 18 ) for pivoting vertically relative to the mounting mast ( 18 ), and a hydraulic system ( 85 ), adapted for being coupled to a hydraulic fluid supply and associated control valve, incorporating a double-acting hydraulic cylinder ( 24 ) extending between the front loader arm ( 20 ) and the mounting mast ( 18 ) and including a head end chamber ( 94 ) and a rod end chamber ( 96 ), and further incorporating a device for the hydraulic spring suspension of the front loader arm ( 20 ) defined in part by a hydraulic accumulator ( 82 ) in conjunction with a load-pressure-controllable control valve ( 84 ), the improvement comprising: said hydraulic system ( 85 ) further incorporating an adjusting means, by means of which the hydraulic cylinder ( 24 ) can be brought into a floating position when the hydraulic fluid supply is decoupled from the hydraulic system ( 85 ); said adjusting means comprising a shut-off valve ( 90 ) coupled between the head end and rod end chambers ( 94 ) which has a first switching position ( 108 ) blocking fluid communication between the head end and rod end chambers ( 94 , 96 ) and a second switching position ( 110 ) establishing a fluid connection between the head end and rod end chambers ( 94 , 96 ).