Patent ID: 7178700
Filing Date: 2007-02-20
Classification: F16N

Abstract:
1. A grease gun plunger for a grease gun having an oil injection channel, comprising: a motor driving unit, having a driving shaft extending eccentrically, adapted for connecting to a power motor of said grease gun to drive said driving shaft to rotate; and a grease pumping arrangement; which comprises: a plunger unit comprising a bracket having a bracket cavity and an elongated slot longitudinally formed on a rear wall of said bracket to communicate with said bracket cavity, and a plunger pin downwardly extended from said bracket for slidably inserting into said oil injection channel; and a yoke, which is substantially held in said bracket cavity of said bracket, having a sliding channel aligning with said elongated slot of said bracket, wherein said driving shaft is slidably inserted into said sliding channel through said elongated slot in such a manner that when said driving shaft is rotated to slide along said sliding channel, said yoke is driven to move in a reciprocating manner along a transverse direction, such that said plunger pin is reciprocatingly driven by said bracket for injecting oil in said oil injection channel.