Positive-displacement reciprocating compressor

Abstract

A positive-displacement reciprocating compressor, comprising a plunger slidingly coupled inside a cylinder, in which a compression chamber is obtained, and operatively connected to driving means which put it in motion inside the cylinder. The driving means comprise a motor having the rotation shaft coupled with eccentric means mechanically connected to the plunger and able to impose longitudinal displacements to the plunger according to an orthogonal direction with respect to the rotation axis of the shaft.

1 . A positive-displacement reciprocating compressor, comprising at least a plunger slidingly coupled inside a cylinder, in which a compression chamber is obtained, and operatively connected to driving means able to put it in motion in said cylinder, wherein said driving means comprise a motor having the rotation shaft coupled with eccentric means mechanically connected to said plunger and able to impose longitudinal displacements to said plunger according to an orthogonal direction with respect to the rotation axis of said shaft.  
   
   
       2 . The compressor according to  claim 1 , wherein said eccentric means consist of a substantially longitudinally developed rotating body, in which a tubular portion coupling to said shaft, on one side, and an eccentric pin, on the other side, are obtained.  
   
   
       3 . The compressor according to  claim 2 , wherein said eccentric pin is provided with contrast means able to cooperate with a profile obtained in a bracket which supports said plunger.  
   
   
       4 . The compressor according to  claim 2 , wherein said eccentric pin is coupled with contrast means able to cooperate with a connecting rod, fastened to a lower bracket, and an upper bracket, which support said plunger.  
   
   
       5 . The compressor according to  claim 2 , wherein said rotating body is externally provided with a shaped sleeve, coaxial with said tubular portion, able to balance the weight of said tubular portion with respect to said eccentric pin during the rotation of said rotating body.  
   
   
       6 . The compressor according to  claim 3 , wherein it comprises a plunger supported by said bracket.  
   
   
       7 . The compressor according to  claim 3 , wherein it comprises a pair of mutually opposed and coaxial plungers supported by said bracket.  
   
   
       8 . The compressor according to  claim 2 , wherein it comprises a first pair of mutually opposed and coaxial plungers, supported by a first bracket, and a second pair of mutually opposed and coaxial plungers, supported by a second bracket, said brackets being mutually orthogonally disposed and sliding one above the other.  
   
   
       9 . The compressor according to  claim 8 , wherein the longitudinal axis, defined by each of said plungers, lies on the sliding plane between said first bracket and said second bracket to dispose the centre of each of said plungers on the same virtual circumference.  
   
   
       10 . The compressor according to  claim 9 , wherein said contrast means comprise a pair of cams mounted one above the other, coaxial to each other and to said eccentric pin, the first cam cooperating with said profile obtained in said first bracket, and the second cam cooperating with said profile obtained in said second bracket.  
   
   
       11 . The compressor according to  claim 3 , wherein said profile consists of an opening able to house said contrast means.  
   
   
       12 . The compressor according to  claim 4 , wherein the head of said connecting rod is engaged with an opening obtained on said lower bracket, and the small end of said connecting rod is coupled with a pin through the interposition of a ball bearing.  
   
   
       13 . The compressor according to  claim 11 , wherein said opening is a through opening.  
   
   
       14 . The compressor according to  claim 3 , wherein said profile has a pair of mutually facing wearproof inserts applied to the lateral edge of said profile.  
   
   
       15 . The compressor according to  claim 4 , wherein it comprises a pair of mutually opposed and coaxial plungers, supported by said lower bracket and said upper bracket, said brackets being mutually parallel and spaced and coupled with said plunger at the peripheral edge of said plunger.  
   
   
       16 . The compressor according to  claim 1 , wherein said plunger is provided with a perimetral sealing element, protruding from the lateral edge of said plunger and maintained steady in position by a covering disk mounted in a depression obtained on the outer wall of said plunger.  
   
   
       17 . The compressor according to  claim 16 , wherein said covering disk is made integral with said plunger through first fastening means.  
   
   
       18 . The compressor according to  claim 1 , wherein it comprises a shaped basement which supports said plunger.  
   
   
       19 . The compressor according to  claim 18 , wherein it comprises a collection chamber for the compressed air, provided with at least an inlet for said compressed air in communication with said compression chamber of said cylinder and with at least an outlet for said compressed air in communication with the outside.  
   
   
       20 . The compressor according to  claim 19 , wherein said collection chamber is obtained in said shaped basement.  
   
   
       21 . The compressor according to  claim 19 , wherein said collection chamber consists of a tubular structure which externally limits said driving means and said shaped basement.  
   
   
       22 . The compressor according to  claim 19 , wherein said inlet is provided with a valve opened during the compression stroke and closed during the induction stroke.  
   
   
       23 . The compressor according to  claim 20 , wherein said collection chamber has an annular shaped profile.  
   
   
       24 . The compressor according to  claim 20 , wherein said shaped basement is provided with a closure cap of said collection chamber.  
   
   
       25 . The compressor according to  claim 22 , wherein said valve is an annular foil.  
   
   
       26 . The compressor according to  claim 18 , wherein it comprises at least a head, externally applied to said basement through second fastening means, to be disposed to cover said cylinder.  
   
   
       27 . The compressor according to  claim 26 , wherein said head has at least a through hole for sucking said air to be compressed in said cylinder.  
   
   
       28 . The compressor according to  claim 27 , wherein it comprises a flexible thin blade, coupled with the inner wall of said head, said inner wall being turned toward said cylinder and said flexible thin blade being blocked at the ends by placing the peripheral edge of said cylinder close to said head.  
   
   
       29 . The compressor according to  claim 28 , wherein said thin blade is disposed near said through hole, to close it during the compression stroke and to open it during the induction stroke.  
   
   
       30 . The compressor according to  claim 14 , wherein said wearproof inserts are made of lapped steel.  
   
   
       31 . The compressor according to  claim 14 , wherein said wearproof inserts are made of Teflon.  
   
   
       32 . The compressor according to  claim 1 , wherein it comprises at least two wheels for its handling, joined to said shaped basement.  
   
   
       33 . The compressor according to  claim 1 , wherein it comprises comprising handle means available to the user, joined to said shaped basement.  
   
   
       34 . The compressor according to what substantially described and shown.