Untitled record

Application filed March 8,1881.

(No model.)

To all whom may concern:

Be it known that I, Joseph Thatcher Woods, a citizen of the United. States, residing at Toledo, in the county of Lucas and State 5 of Ohio, have invented certain new and useful Improvements in Bulbs and Valves for Stomach-Pumps, Syringes, Aspirators, &c.; and I do hereby declare the.following to be a full, clear, and exact description of the invention, io such as will enable others skilled in the art to which it appertains to make and use the same, reference beinghad to the accompanying drawings, and to the letters or figures of reference “ marked thereon,which form a partof thisspeci15 fication.

This invention relates to the rubber bulbs which are employed in syringes, stomachpumps, and aspirators. The rubber bulb or elastic globe commonly used in such devices 20 is provided with an inlet and an outlet tube, through which the fluid is admitted into and I discharged from the bulb by the alternate contraction and expansion of the bulb, as will be readily understood by those skilled iu the art. 25 The invention consists in an improvement in the construction of the extremities of the . bulb by the provision of inlet and outlet ballL . valves to admit of the use of the bulb in the peculiar manner hereinafter specified, and in 30 the mode of securing the valve-seats in place, all as more fully described in the following specification, and particularly pointed out in the claim.

In the drawings, Figure 1 is a side eleva35 tion of a bulb embodying my improvement; and Fig. 2 is a longitudinal central section, taken on the line 11, Fig. 1.

The letter H indicates the body of the bulb, which is of the construction ordinarily em40 ployed in this class of syringes, stomachpumps, and aspirators, excepting, however, that the bulb is made a little thicker than usual, to increase its strength, and that it is formed with the ends C C extended sufficiently 45 to inclose the valve-seats and valves. As both, ends of this bulb are constructed alike, a description of one w’ill serve for both.

At one end of the valve-chamber D is arranged the valve-seat G, and at the opposite 50 end of said chamber is arranged the valveseat A, both of these said valve-seats being firmly secured in place by the extended end of the bulb. The bulb is formed with a bulge, a', at its end, said bulge forming a recess, » 55 which receives the enlarged portion a² of the valve-seat G, thereby effectively securing said seat in place. This recess forms an annular seat or shoulder, a, against which the seat G fits.

The outer valve-seat, A, is formed with a 60 depression, B, and the end 0 of the bulb is contracted, as at h', so as to fit into said depression of the outer seat, and thus retain the same firmly in place. The outer valve-seat is extended into a screw-nozzle, g, which pro- 65 jects out from the bulb end, and it is also formed with a flange, g', which rests against the tip of the bulb end.

E' designates the ball-valve which is employed, the seats being formed with conical 70 recesses to receive the same when seated.

p p designate, in outline, sections of flexible tubing connected with the nozzles g g.

In use the operator will hold this bulb perpendicularly, so that the valves will drop into 75 their proper places, as illustrated in Fig. 2. By now compressing the bulb and then releasing the pressure thereon the fluid will flow therein through the lower inlet as the bulb expands. A repetition of the pressure upon the 80 bulb causes the fluid to be ejected through the upper outlet. By now reversing the position of the bulb and repeating the above operation there will be a reversal of the flow of the liquid,the ball-valvesdroppinginstantlybygrav- 85 ity, in order to admit of such flow; hence the device can be operated without disturbing the tubes, and tbe fluid ejected in the first instance be readily withdrawn from the place where it was first caused to flow into. By holding the 90 bulb in a horizontal position the valves will drop from their seats, so that the device can be used as a siphon.