Positive Displacement Pump

Abstract

A rotating externally mounted positive displacement pump having at least two displacing bodies which are driven synchronously with respect to one another and are fastened on the end side on associated shafts, the shafts being mounted in each case by way of a first, radially acting bearing and a second, radially and axially acting bearing, and the shafts being coupled to one another by way of a synchronizing gear mechanism, is developed in that the bearings are fitted into seat bores of a housing which is manufactured in one piece, and in that the synchronizing gear mechanism is arranged between the respective bearings.

What is claimed is: 
     
         1 . A rotating externally mounted positive displacement pump having at least two displacing bodies which are driven synchronously with respect to one another and are fastened on an end side on associated shafts, the shafts being mounted in each case by way of a first, radially acting bearing and a second, radially and axially acting bearing, and the shafts being coupled to one another by way of a synchronizing gear mechanism, wherein the bearings are fitted into seat bores of a housing which is manufactured in one piece, and in that the synchronizing gear mechanism is arranged between the respective bearings. 
     
     
         2 . The pump according to  claim 1 , wherein the synchronizing gear mechanism has two pinions which mesh with one another and the diameter of which is greater than the axial spacing of the shafts. 
     
     
         3 . The pump according to  claim 2 , wherein the pinions in each case have a toothed rim which is fastened on a supporting body. 
     
     
         4 . The pump according to  claim 3 , wherein a greatest external diameter of the supporting bodies is smaller than the axial spacing of the shafts. 
     
     
         5 . The pump according to  claim 3 , wherein the supporting bodies are fastened on the shafts in a non-positive and/or positively locking manner. 
     
     
         6 . The pump according to  claim 4 , wherein the supporting bodies are fastened on the shafts in a non-positive and/or positively locking manner. 
     
     
         7 . The pump according to  claim 3 , wherein the toothed rims are fastened to the supporting bodies in a non-positive manner. 
     
     
         8 . The pump according to  claim 4 , wherein the toothed s are fastened to the supporting bodies in a non-positive manner. 
     
     
         9 . The pump according to  claim 5 , wherein the toothed rims are fastened to the supporting bodies in a non-positive manner. 
     
     
         10 . The pump according to  claim 6 , wherein the toothed rims are fastened to the supporting bodies in a non-positive manner. 
     
     
         11 . The pump according to  claim 7 , wherein the toothed rims are fastened on the supporting bodies by means of screwed clamping plates. 
     
     
         12 . The pump according to  claim 8 , wherein the toothed rims are fastened on the supporting, bodies by means of screwed clamping plates. 
     
     
         13 . The pump according to  claim 9 , wherein the toothed rims are fastened on the supporting bodies by means of screwed clamping plates. 
     
     
         14 . The pump according to  claim 10 , wherein the toothed rims are fastened on the supporting bodies by means of screwed clamping plates. 
     
     
         15 . The pump according to  claim 1 , wherein the pump is a single-flow screw-spindle pump. 
     
     
         16 . The pump according to  claim 2 , wherein the pump is a single-flow screw-spindle pump. 
     
     
         17 . The pump according to  claim 3 , wherein the pump is a single-flow screw-spindle pump. 
     
     
         18 . The pump according to  claim 4 , wherein the pump is a le-flow screw-spindle pump. 
     
     
         19 . The pump according to  claim 5 , wherein the pump is a single-flow screw-spindle pump. 
     
     
         20 . The pump according to  claim 7 , wherein the pump is a single-flow screw-spindle pump.