US773316A - Rotary pump. - Google Patents

Description

N9. 773,316. PATENTED OCT. 25, 1904. E. W. EVANS.

ROTARY PUMP. APPLIOATION FILED FEED, 1:904.

K0 MODEL.

UNITED STATES Patented October 25, 1904.

PATENT @EETQE.

EDVIN IV. EVANS, OF PHILADELPHIA, PENNSYLVANIA. ASSIGNOR OF ONE-HALF TO SPENCER K. LEWIS, OF PHILADELPHIA, PENN-' SYLVANIA.

ROTARY PUMP.

SPECIFICATION forming part of Letters Patent No. 773,316, dated October 25, 1904. Application filed February 9, 1904. Serial No. 192,754. (No model.)

To all whom, it 777,04 (lo/worn:

Be it known thatI, EDWIN l/V. EVANS, a citi- Zen of the United States, residing in Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented a new and useful Improvement in Rotary Pumps, of which the followingis a specification.

My invention relates to rotary pumps. It comprises a novel pump by which water or other liquid may be raised or air or other gas compressed.

It further consists of novel features of construction, all as will be hereinafter fully set forth.

Figure 1 represents, chiefly in longitudinal section, a pump embodying my invention. Fig. 2 is afragmentary section of the device, showing a different arrangement. Fig. 3 is an elevation of one of the lifting-sections of the pump detached. Fig. trepresents, chiefly in vertical section, a modification of the portion of the device shown in Fig. 2.

Similar numerals of reference indicate corresponding parts in the figures.

Referring to the drawings, 1 designates a casing which may be of cylindric or rectangular section and which is divided by a par- -tition 2 intochambers 3 and 4. A shaft 5 passes horizontally through thechamber 3 and has hearings in stuffing-boxes 6 and 7 at the ends thereof. On the shaft 5 is mounted a plurality of pump-sections 8, 9, and 10, the peripheries of which are hollow, forming a connected spiral conduit. As shown, thesection 8 has an open mouth 11. Thesection 10 has a lateral discharge-opening 12, the function of which will hereinafter appear. The intermediate sections 9 are bent at theirends 13, and preferably provided therein with check-valves M, as shown. The end of the shaft 5, which passes through the stuffingbox 6, is made tubular, as shown, and is connected by asleeve 16 within the portion 4: of thecasing 1 with the discharge-pipe 17, which extends out of the casing. The tubular por-.tion 15 of the shaft 5 is connected at its inner end by means of aradial portion 18 with the outlet 12 of thesection 10, a check-valve 19 being interposed at or near the connection of these parts. Thechambers 3 and A of thecasing 1 are also connected by apipe 20, provided with a valve-seat 21, in which isa valve 22, connected by a lever 23 with a float-ball 24. Thechambers 3 and 4 of the casing l are,

also provided withsuitable ports 25 26, respectively.

The operation is as follows: Fig. 1 represents my device as connected for the raising ofwater, which may be admitted through the opening 25. of thechamber 3 of thecasing 1 or through a bottom opening. (Not shown.) Assuming that the lower portion of thechamber 3 is half-full of water, it is evident that each rotation of the shaft 5' in the direction of the arrow (shown adjacent the pulley 27) will cause the mouth 11 of the hollow section 8 to dip up a portion of the water. Each subsequent rotation will cause the water so dipped up to pass one of the check-valves 14 in one of the sections 9 successively from right to left of the drawings. When this first volume of water passes through thesection 10. it is discharged through the check-valve 19 andpassage 18 into the tubular portion of the shaft 5, thence through the discharge-pipe 17, in which it may be raised to a height corresponding to the number of convolutions in theconduit system 8, 9, and 10. It is evident that a fairly rapid rotation of the shaft 5 will result in an intermittent stream of water and air being forced out through the pipe 17.

When it is desired to use the pump for compressing air, the pipe 17 is removed, and the aperture through whichit enters the pump 4: filled by aplug 28, as shown in Fig. 2. The water-inlet is cut off from the opening 25, which is opened to the atmosphere, and thechamber 3 filled less than one-half full of water.

It is evident that the rotation of the .sections will in this case discharge water and air under pressure out of the open mouth of thetubular portion 15. A suitable pipe being connected to the outlet 26 the air is led away to a storage-tank or place where it is to be used. When the water discharged from thetube 15 rises to a sufficient height in the chamber 4., it will raise the float 2a and valve 252, so that the water will pass back through thepipe 20 into thechamber 3. In this it will be assisted by the pressure of air in the upper part of the chamber at. If desired, a check-valve 29 (shown in Fig. 4 of the drawings) may be placed at the open end of thetubular portion 15 of the the shaft 5.

It is evident that various changes may be made by those skilled in the art which will come within the scope of my invention. Thus, except for economy of construction, it might be advantageous to make thesections 8, 9, and 10 in a continuous spiral instead of in the form shown, and I do not, therefore, desire to be limited in every instance to the exact construction herein shown and described.

Having thus described my invention, what 1 claim as new, and desire to secure by Letters Patent, is

1. A rotary pump comprising a plurality of convoluted conduit-sections, a mouth on one of said sections, check-valves between said sections, an axial discharge and means connecting the convoluted portion farthest from said mouth with said axial discharge.

2. A pump comprising a rotary shaft, a plurality of convoluted conduit sections mounted on said shaft and connected together, check-valves intermediate said sections, one of said sections having a mouth and the one farthest therefrom an axial discharge and a casing in which said convoluted sections are mounted.

A rotary pump adapted alternatively to the lifting of liquid and the compression of an aeriform fluid comprising a plurality of convoluted sections, a mouth on one of said sections, check-valves between said sections, a tube providing an axial discharge-orifice for said sections, a chamber in which said tube enters, and means on said chamber for detachably connecting a discharge-pipe with said tube.

4. A rotary pump adapted alternatively to the lifting of liquid and the compression of aeriform fluid comprising a hollow convolution having a mouth, an axial discharge-orilice, a valve intermediate said mouth and said orifice, a chamber in which the tube comprising said discharge-orifice enters, means for detachably connecting a discharge'pipe with said tube within said chamber and separate means for the emission of liquid and aeriform fluid from said chamber.

5. A rotary pump adapted alternatively to the lifting of liquid and the compression of aeriform fluid comprising a rotary hollow convolution having a mouth, an axial dischargeorifice, a valve intermediate said mouth and said orifice, a chamber in which the tube comprising said discharge-orifice enters, means for detachably connecting a discharge-pipe with said tube within said chamber, means for the emission of aeriform fluid from said chamber, a discharge-orifice for liquid from such chamher and an automatic valve controlling said last-named orifice.

6. A rotary pump comprising a casing provided with a plurality of chambers, a rotary shaft passing through one of said chambers and having a tubular end portion opening into the other of said chambers, a plurality of hollow convoluted sections in said. firstnamed chamber, one of said convolutions having an open mouth and another of said convolutions having a tube connecting it with the tubular portion of said shaft, check-valves intermediate said mouth and said connectingtube, means in said casing for detachably conneoting a discharge-pipe with said tubular shaft portion and separate apertures for the emission of aeriform fluid and of a liquid from said second chamber.

EDWIN l V. EVANS.

\Vitn ess es:

JOHN A. W I'EDERSHEIM, (ino. L. Goornn.

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