Reaction mechanism of a hydraulic control valve

A reaction mechanism which comprises:

• at least one pump;
• a control valve for regulating hydraulic pressure by controlling hydraulic fluid disgorged from said pump;
• an input member mechanically connected to said control valve and operated by a driver, said input member having a smaller diameter portion and a larger diameter portion the larger diameter portion being located closest to the driver;
• an annular reaction regulating member in which said smaller diameter portion of said input member is slidably inserted;
• a first spool located adjacent said annular member;
• first biasing means for normally urging said annular member toward said larger portion of said input member;
• second biasing means for normally urging said first spool to said input member;
• and
• means for supplying said hydraulic pressure regulated by said control valve into an area between said annular member and said larger diameter portion of said input member to displace said annular member in a direction away from said larger diameter portion of said input member and in the same direction as the displacement of the input member against said biasing means;
• whereby the displacement of said annular member reduces the reaction of said input member to variations of said hydraulic pressure when said hydraulic pressure is below a predetermined value.