US1645834A - Valveless pump - Google Patents

Description

2 Sheets-Sheet 1 P. VOREAUX VALVELESS PUMP Filed March 192- Oct. 18,1927.

Oct. 18,1927. P VOREAUX f 1,645,834

VALVELE-SS PUMP Filed March 11. 51924 2 Sheets-$119M 2 t... s. 1s, 921.

-UNITED STATES I 1,645,834 PATENT OFFICE.

PAUL VOBIAUX, OF PARIS, FRANCE, ASSIGNOB TO E'IAIBLISSEMENTS SAMGA ET BAVOX REUNIS, 0] PARIS, FRANCE.

VALVELESS PUMP.

Application fled latch 11, 1824, Serial No. 888,479,.and in France July 13, 1828.

The present invention has for its object a ump adapted to revolve at a great speed ich has the minimum of wei ht, occulies as little space as possible an is easily grivenby the modern-style high rate motors. The characteristic feature of this pump consists in the way in which the pistons are connected with the crank-shaft by means of ivot-bearings allowing the piston to effect, liesidestheir reciprocating motion, a revolving motion about themselves around their axis, so that the piston'will execute a resulting helical or tacking motion withlnnts c linder, which motion is used for securing lie delivery and the normal sucking and forcing or exhausting operation of the pump.

The following description made with reference to the accompanying drawing, given by way of example, will allow to easily understand the way in which the invention is carried out.

' Fig. 1 is a 'lon 'tudinal section of the pump made throng X-X of Fig. 2.

Fig. 2 is a section made through YY of Fig. 1.

Fig. 3 is a detail view of a piston.

Fig. 4 is a sectional view through Z-'Z of Fig. 3.

Fig. 5 is a plan view of Fig. 4.

Fig. 6 is a modified form of Fig. 3.

Fig. 7 is a front view of the pivot-bearin A I Fig. 8 is a section thro h V-V of Fig. 7. 9 is a horizonta section through U- of Fig. 8. A

The apparatus essentially comprises a fixed frame 0i formed by two cy indrical map barrels which are arranged crosswise, at the one with reference to-the other, and acting as support for the crank-shaft b with two elbows whose axis is normal to those of the pump barrels.

In the barrel a are provided ports or' orifices c and d for the admission and exhaust of air. Pistons e which are rigidly connected together two by two, are mounted on the crank-shaft through the medium of pivot-bearings f, shown in Figs. 7, 8 and 9. Phese bearings can be formed of two parts and compr se an internal cylindrical cavity f into which one of the cylindrical bearings of the crank-shaft b is adapted to enter as shown in Fig. 1. On the other hand, the ends f, acting as pivots, freely enter into cylindrical recesses g, see Fig.

' pump barrel.

4, which are arranged parallel but eccentric to the axis H of the piston c. It will be noted that I use 'no connecting rods between pistons and cranks, the pivot pins being all that is required. Bottoms or heads G close the pump barrel and secure tightness.

Accordingly, it will be understood that a revolution ofthe crank-shaft b will impart to a group of two diametrally opposed pistons a. tacking or helical motion, which means that every piston, while having a reciprocating motion within its cylinder, will rotate about its own axis m-w.

The motion of each of the crank-pins may be considered as resolved into two components, one parallel to the axis of the pistons it actuates, and the other at right angles to it. The first of these motions communicated to the pistons through members 7 f? will reciprocate the pistons, while the second motionat right angles to the axis and at a distance from it oscillates thepistons. As the member f oscillates with the piston it slides back and forth on the crank pin, the

' crank pin being made longer than the member f to provide for this motion. -This helical motion is utilized for insuring, on

the one hand, the volumetric variation causing the suction and the exhaust and,' on the other hand, the delivery. To this purpose, every piston is provided with two opposite holes h, i which are adapted to sucessively uncover the ports a d, of the Referring to Figs: 1 and 2, it will be seen that the up r iston e is at the end of its up stroke.v n or these conditions, its orifice It will uncover, at the down stroke of the iston e, the port a in movin in the direction of the arrow shown in p 1 lines at Fig. 2. On the contrary, the port a will move away from the port (1, whereas, in virtue or the revolution of the iston about its axis :v-w, the said port 11 wil come to the position which is indicated in mixed lines at z, the port or hole 'h being above the port 0; this moment. will correspond to the full suction.

When the piston has achieved its suction stroke and is at the end of its down stroke,

of the piston, that is to sa the piston, in rising again, will revolve about its axis in, the opposite direction to that in which it has been revolving during the down motion and consequently it is the port i which comes opposite the exhaust or forcing port d, thereby allowing the air contained between the piston and the head of the cylinder to escape through the said exhaust pipe (1 as shown in Fig. 1.

It will be understood that the degree of compression of the pump can be varied according to the position and the form of the ports or orifices c, d, h, i. More particularly, it is possible touse ports or .ori fices havin an oval or flattened action, as shown in ig. 6.

In the construction which is shown in Figs. 1 and 2, the pump sucks and forces without compressing that is to say that the forcing or exhausting ports 0 n as soon as the suction ports are close The pump which is thus constructed forms a compact mas, which is well balanced, has light moving members and a reduced number of parts,

tors. I v g Of course, some modifications can be made in the construction of the pump which has just been described without departing from the principle of the invention.

What I ciaim is:

In a pump a casing having two opposite cylinders and pistons, a crank shaft mounted in the casing, means forming a sole connection between the crank of sald shaft and eccentrically with the opposed ends of the pistons, each of said means having slid' movement longitudinally of the crank, an said casing and pistons having cooperating ports.

In testimony that I claim the foregoing as my invention, I have signed my name hereto.

PAUL VOBEAUX.

the pistons acting by themselves as distribu;

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