US1748810A - Syringe - Google Patents

Description

Feb. 25, 1930. B, wANDEl 1,748,810

l SYRINGE i i Filed Feb. 9. 1928 INVENTOR` Patented Feb. 25, 1930 BARNEY WANDET., 0F BOSTON, MASSACHUSETTS sYRrNeE Appiication mea February 9,1928. serial No. 253,043.

- provision of a syringe having telescopically arranged cylinders'relatively rotatable, and having interlocking members to hold the two cylinders in'an assembled position, the outer of said cylinders being provided with a plurality of nozzles for the reception of tubes,

and the inner cylinder being providedr with a single port that is selectively alinedfwith said nozzles by relative rotation of the cylinders.

'Ihev invention will Ibe described in detail hereinafter and will be found illustrated in the accompanying drawings, in which Figure 1 is an elevational view of the improved syringe arranged for transfusion of blood, j

Figure 2 is a central longitudinal sectional view of the syringe cylinder showing the plunger in elevation, and y Figures 3 and 4 transverse sectional views on planes indicated by the lines 3-3 and 4 4, respectively, of Figure 2. y

In the drawings similar reference characters will be used to designate corresponding parts throughout the several views.`

In Figure 1 the syringe barrel or `cylinder 1 is shown arranged for transfusion operation witli the arm` A of the donor and the arm B of the recipient, and also with a receptacle C adapted tocontain a saline solution. The syringe barrel 1 comprises two concentric,l telescopically arranged cylinders 2 and 3, preferably made of glass or other transparent material. The outer cylinder 2 is provided Withalange 4 having an interrupted portion forming a recess 5, while theVV cylinder 3 is provided with a flange 6 having a returned projection 7 that engages the flange 4, the interrupted portion of the iange 4 formv ing the recess 5 permitting removal and replacement' of the inner cylinder 3 when the parts are alined, and by relative rotation of the cylinders 'when` assembled the returned projection 7 by engaging the flange holds the two cylinders in assembled position. 8 designates a plunger that is mounted for reciproj cation in the inner cylinder 3.

The outercylinder 1 has nozzles 9 extending laterally therefrom and communicating with the interior of saidV outer cylinder 2 to which are adapted to be'connected flexible tubing 10,11, and 12 respectively, the tube 10 having a cannula 13 connected therewith and adapted tobe used to enter the arm of the donor A, the tube 12 having anothercannula 14 that is adapted to be inserted in the arm of the recipient, while tube 11 is taining a saline solution. The flange 6 is formed with a plurality offlat faces 15 on its edge to permit securely gripping the flange for relative rotation of the cylinder 3 with cylinder 2. y

In using the device it will be apparent that by rotating the cylinders 2 and 3 so that the port 16 in the inner 'cylinder is alined with one or the other of the nozzles 9 that the barrel 1 may be charged with blood from the donor,` A or with saline solution from the receptacle C to the tube 11, or the blood or adapted to be inserted in the receptacle Cconsolution may be discharged to the recipient as may be desired. It will be furthermore understood that the cylinders 2 and 3 being formed of transparent material enables the operator to ascertain the amount of blood or saline solution in the barrel and that furthermore a gage may be used in connection with the syringe barrel and may be formed there- `IVhat is claimed is 1. A syringe, comprising relatively rotatj 2. A syringe, comprising relatively rotatable concentric cylinders telescopically arranged, said cylinders being closed at correspending endsand open at their other ends,

circumferential flanges on said cylinders, aV

returned projection on one of said flanges engaging the other flange to hold the cylinders assembled, the last mentioned flange having a recess to receive the projection, the. outer cylinder having a plurality of nozzles leading thereinto, the inner cylinder having a port adapted to selectively register with said nozzles by relative rotation of the cylinders, and a plunger in the inner cylinder.

In testimony whereof I aHiX my signature.

BARNEY WANDE'L, M. D.

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