Patent ID: 7392882

Claim:
A lubricant gun, comprising: a housing including a discharge spout, and a longitudinal slide channel arranged for fluidly communicating with said discharge spout; a lubricant reservoir connected to said housing for providing a supply of lubricant into said longitudinal slide channel; a motor mounted within said housing; a final driver rotatably mounted within said housing and arranged to be driven by said motor; an elongate eccentric seat mounted within said housing, and including a first portion connected eccentrically to said final driver, and a second portion opposite to said first portion; a guiding shroud disposed between said elongate eccentric seat and said slide channel within said housing, and defining a guide passage aligned longitudinally with said slide channel; and a plunger having a guiding portion pivotally mounted to said second portion of said elongate eccentric seat and slidably received in and supported by said guide passage of said guiding shroud, and a pushing portion received slidably in said slide channel, said guiding portion of said plunger being arranged to be guided by said guide passage of said guiding shroud when said plunger is driven by said elongate eccentric seat to reciprocate said guiding portion and said pushing portion of said plunger, said guiding portion of said plunger overlapping said second portion of said elongate eccentric seat and being pivoted to said second portion of said elongate eccentric seat where said guiding portion of said plunger and said second portion of said elongate eccentric seat overlap each other, said guide passage having first and second passage parts which are superimposed one upon the other, said first passage part being arranged for receiving said guiding portion of said plunger, said second passage part being arranged for receiving said second portion of said elongate eccentric seat, said second passage part being wider than said first passage part.