E - Fixed Constructions – 02 – F
Patent
E - Fixed Constructions
02
F
138/72.11
E02F 3/70 (1980.01)
Patent
CA 1131100
Abstract A hydraulic linkage which is usable as a front loader on an agricultural or other tractor comprises at least one jib, and usually two interconnected jibs which jibs are upwardly and downwardly turnable about an axis relative to frame means. Each jib comprises telescopic first and second portions and the second portions are extendible from the first portions during raising of the jibs so that a load/apparatus carried at the outer end of each second portion is raised substantially vertically, rather than arcuately about said axis. Spring operated lost-motion mechanism prevents such extension during a lower arc of movement of the jibs about said axis. Raising and lowering is effected by hydraulic rams which preferably have chambers constantly linked by ducts to chambers of second hydraulic rams in such a way that any load/apparatus can automatically be maintained in a chosen attitude to the horizontal during raising or lowering of the jibs. The linkage provides improved stability, a substantially constant length of forward reach, improved vertical reach and the facility for automatic self-levelling of loads/apparatuses which are carried thereby.
340041
Hayward John A.d.
Mccarthy Tetrault Llp
LandOfFree
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