Patent ID: 7296758

Claim:
An automatic lift faucet, comprising: a hydraulic cylinder, said hydraulic cylinder being vertically mounted under a working top and having a lower end and an upper end and a through-hole axially penetrating both ends, and an inlet located proximate to said lower end; a lifting faucet having a top end, a closed bottom end and a middle portion therebetween, said lifting faucet being mounted inside said hydraulic cylinder in motion fitting connection and having an outlet located at said top end and an inlet located on said middle portion; a lifting piston being attached to said lifting faucet and surrounding said inlet thereof and having a pressure valve and a restoring spring for controlling fluid communication between said hydraulic cylinder and said lifting faucet inlet; an accumulator cylinder being horizontally mounted below said working top to said bottom end of said lifting faucet, said accumulator cylinder having a trunk defining a left end, a right end and a middle portion therebetween, said accumulator cylinder including a baffle-plate, a valve stem having left and right ends, and left and right tow pistons, wherein said baffle-plate is centrally attached within said middle portion of said trunk, said baffle plate having a central hole through which said valve stem passes, said left and right tow pistons being attached to said left and right ends of said valve stem respectively, thereby dividing the inside of said accumulator cylinder into a first accumulator sub-chamber between said left end of said trunk and said left tow piston, a second accumulator sub-chamber between said left tow piston and said baffle plate, and a third accumulator sub-chamber between said right tow piston and said right end of said trunk, said accumulator cylinder further including first, second and third through-holes, said first through-hole passing through said left end of said trunk and communicating with said first accumulator sub-chamber, said second through-hole passing through said middle portion of said trunk and communicating with said second accumulator sub-chamber, and said third through-hole passing through said right end of said trunk and communicating with said third accumulator sub-chamber; and an inlet pipe and pressure release valve, wherein said inlet pipe includes a first branch pipe and a second branch pipe, said first branch pipe being connected to said first through-hole, and said second branch pipe being indirectly connected to said second and third through-holes and said inlet of said hydraulic cylinder via said pressure release valve, respectively.