Patent ID: 6122903
Filing Date: 2000-09-26
Classification: A01D,Y10S

Abstract:
An apparatus for raising and lowering a mower unit vertically movably connected to a lawn mower, comprising:a control lever;a connecting mechanism for connecting said control lever and said mower unit; said connecting mechanism including a pivotal link mechanism interlocked to said control lever; and a raising and lowering link mechanism for raising and lowering said mower unit in response to movement of said pivotal link mechanism; andassist means for applying an upward assisting force when said control lever is operated to raise said mower unit through said connecting mechanism, thereby to reduce an operating force required to operate said control lever in a raising direction, wherein said assist means includes a first assist mechanism for constantly applying a first upward assisting force to said raising and lowering link mechanism to raise said mower unit; and a second assist mechanism for applying a second upward assisting force to said pivotal link mechanism to raise said mower unit only when said control lever is operated in said raising direction.