Hydraulic secateur or pruning shears having a device for continuously controlling the separation of its cutting blades

A hydraulic-assisted secateur adapted for cutting or harvesting in arboriculture, viticulture and horticulture, said secateur comprising a body having a front end, a rear end, and two cutting blades attached to said body adjacent to said front end, at least one of said blades being a pivoting blade which is adapted to be driven by a hydraulic device, a drive piston having a shaft secured to said pivoting blade, said shaft being slidable within an opening in said body and said piston comprising opposed work faces, said work faces defining a portion of enclosed first and second chambers, respectively, said first chamber being in constant fluidic communication with an inlet for pressurized hydraulic fluid which is adapted to be attached to said body, a distributor drawer, and fluidic distribution means adapted to control the movement of said piston within said body opening, said distributor drawer being slidably positioned within said piston and within said shaft and being indirectly connected to a trigger, said secateur including means for setting and maintaining said blades in a predetermined position, which position may comprise any position between an entirely open position of said blades and an entirely closed position of said blades.