A - Human Necessities – 01 – C
Patent
A - Human Necessities
01
C
111/20
A01C 5/00 (2006.01) A01C 5/06 (2006.01) A01C 7/20 (2006.01)
Patent
CA 1244291
ABSTRACT Furrow Opener Operating Apparatus There is described a furrow opener apparatus capable of operating in a furrowing mode and a carrying mode. The apparatus consists of a double acting hydraulic cylinder (10) having one end (20) connected to a furrow opener drag arm and the other end (D) connectable to a drill rig. It incorporates a pressure cushioning system consisting of at least one pressure absorber and hydraulic lines communicating through a mode valve (12) with both the thrust draw sides (26, 28) of the double acting cylinder (10). It further communicates through a single or double acting hydraulic valve (16,18) to the hydraulic pump (17) and reservoir (19) of an associated prime mover such as a tractor. The mode valve (12) is hydraulically connected to both the thrust and draw sides (26,28) of the double acting cylinder (10). In a first mode the mode valve (12) is hydraulically connectable to the pressure cushioning system and in a second mode hydraulically connected through a double acting hydraulic valve (10) to the hydraulic pump (17) and hydraulic reservoir (19) of the prime mover. In use when the mode valve (12) is in the first mode the pressure absorber cushions forces transmitted hydraulically through the double acting hydraulic cylinder (10) from the openers and maintains a substantially constant pressure on both the draw and thrust sides (26, 28) of the double acting cylinder (10) to thereby create a net downward force from the ram (22) onto the furrow opener arm. In the second mode the double acting hydraulic cylinder (10) is operable by the double acting hydraulic valve (18) to thrust or draw its ram (22) to respectively lower or raise the furrow opener drag arm.
483731
Baker Christopher J.
Kernohan Craig D.
Fetherstonhaugh & Co.
Massey University
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