Small-size grease gun

Abstract

A small-size grease gun includes a hollow main body, a grease nipple connected to a front end of the main body, a push rod elastically movably disposed in the main body, and a cylindrical grease container screwed to a sleeve vertically extended from a top of the main body. A rear section of the push rod is projected from a rear open end of the main body to connect to a knob. The grease container has a hold-down disc positioned therein and being normally pushed downward by a spring fixed to a lower side of a top cover of the grease container. An amount of grease filled in the grease container is forced into the main body by the hold-down disc. By pushing the rear section of the push rod into the main body, the grease is compressed to inject into a small-size pneumatic tool via the grease nipple.

What is claimed is:  
     
         1 . A small-size grease gun, comprising: 
 a hollow main body having a conical grease nipple connected to a front end thereof, a sleeve vertically extended from a top of said main body, and a push rod movably associated with said main body; said push rod including a front section that is received in a hollow space defined by said main body with a first spring put thereon, and a rear section that is projected from a rear open end of said main body to connect at a rear end to a knob; and    a cylindrical grease container having a locking neck portion provided at a lower end thereof for screwing onto said sleeve of said main body; a hold-down disc having an O-ring mounted around an outer peripheral edge thereof being positioned in said grease container, and a top cover having a second spring fixed to a lower side thereof being closed onto an upper open end of said grease container, such that said second spring normally pushes said hold-down disc downward;    Whereby when said hold-down disc is positioned into and said top cover is closed onto said grease container after the latter is filled with an amount of grease, said second spring pushes said hold-down disc downward to force said grease into said main body via said sleeve; and when said rear section of said push rod is pushed into said main body, said grease in said main body is compressed to inject into a small-size pneumatic tool via said grease nipple.