Air compressor having a smooth and stable structure

Abstract

An air compressor includes a bearing engaged in a base, a weight having a pivot axle rotatably and stably secured to the casing with the bearing and having a shaft offset or eccentric relative to the pivot axle. A cylinder includes a piston rod rotatably coupling to the shaft of the weight. A gear is engaged on the weight and rotated in concert with the weight relative to the base about the pivot axle. A motor is secured to the base and has a pinion engaged with the gear for rotating the weight and for moving the piston rod relative to the cylinder in a reciprocating action.

I claim:  
     
         1 . An air compressor comprising: 
 a) a base including an aperture formed therein,    b) a bearing engaged in said aperture of said base,    c) a weight including a pivot axle extended outward therefrom and engaged in said bearing and thus rotatably secured to said casing with said bearing, said weight including a shaft extended therefrom and eccentric relative to said pivot axle,    d) a cylinder including a piston rod rotatably coupling to said shaft of said weight,    e) a gear engaged on said weight and rotated in concert with said weight relative to said base about said pivot axle of said weight, and    f) a motor secured to said base and having a pinion provided thereon and engaged with said gear for rotating said gear and said weight and for moving said piston rod relative to said cylinder in a reciprocating action.    
     
     
         2 . The air compressor according to  claim 1 , wherein said base includes a peripheral flange extended radially inward of said aperture of said base for forming an orifice in said base and for receiving said axle of said weight.