Patent ID: 7484251

Claim:
A lavatory jet assembly for a lavatory having an upper rim and defining a top opening therewithin, comprising: a mounting base, which is adapted for securely mounting to said lavatory, having an inner end positioning closed to said upper rim of said lavatory and an outer end extended towards a center of said top opening; a jet unit comprising a water inlet for guiding a predetermined volume of water flowing from said lavatory, and a jet nozzle communicatively connecting to said water inlet for upwardly ejecting said water therefrom towards said top opening of said lavatory, said water inlet is an elongated water guider having one end defining said water inlet and opposed end connecting to said jet nozzle; a jet adjusting arrangement comprises a power unit supported by said mounting base and an adjustment slider powered by said power unit to adjustably move said jet nozzle along said mounting base between said inner and outer ends thereof such that said jet nozzle is selectively moved to a desired cleaning position for ejecting said water within said upper rim of said lavatory, wherein said adjustment slider comprises a belt gear system comprises a main belt gear connected to said axle of said power unit, a driven belt gear connected to said outer end of said base, and a transmission belt provided for tying around said main belt gear and said driven belt gear, wherein said water guider is connected to said transmission belt, such that when said power unit is switched on, said power unit rotates said main belt gear, driving said transmission belt such that said water guider is moved along with said transmission belt, such that said jet unit is slid along said mounting base to adjust cleaning position of said jet nozzle; a center axel having a first end connecting to a protruding board that attached to a coupling stand of said mounting base, and an opposite second end connecting to said driven belt gear, wherein said mounting base further has a first contacting portion extended toward said transmission belt in a direction opposite to said water inlet, a second contacting portion extends from said center axel toward said first contacting portion and a resilient element disposed between said first contacting portion and said second contacting portion, said resilient element exerting a biasing force to move apart said first and said second contacting portions so as to automatically maintain the predetermined amount of tension of said belt gear system.