US2533252A - Pump - Google Patents

Description

fiecq 12, 11956 J. N. HINCKLEY PUMP 2 Sheets-Sheet 1 Filed April 20, 1945 30 INVENTOR Joy/WV. H/Nc/Q EY BY WWMQW ATTORNEYS Patented Dec. 12, 195% UNITED STATES PATENT OFFICE 6 Claims.

The invention relates to pumps and more particularly to pumps of the rotary type.

It is an object of the invention to provide a pump which is small, compact and simple in construction which can handle different liquids and gases of widely varying viscosity and fluidity, which has high output per unit of weight, and which can develop high pressure and handle large volume at low speeds.

According to a preferred form of the invention, the pump comprises a cylindrical casing having inlet and outlet ports closely related. A cam-shaped rotor is journaled within the casing and so shaped as to sweep a charge of fluid from the inlet port to the outlet port. Cooperating with the rotor is a special shaped arm riding on the cam surface of the rotor and having a partition Wall for separating the closely positioned inlet and outlet openings. The inlet port may be sufliciently large to accommodate a good part of the arm to provide a clearance for its movement and the arm may have an opening therein to permit inflow of the fiuid. The rotor arm and ports are so related as to prevent any direct leak between the inlet and outlet ports and the rotor is shaped to permit a smooth movement of the arm and to efficiently convey the fluid from inlet opening to outlet opening with a minimum of disturbance.

The invention also consists in certain new and original features of construction and combinations of parts hereinafter set forth and claimed.

Although the novel features which are b lieved to be characteristic of this invention will be particularly pointed out in the claims appended hereto, the invention itself, as to its objects and advantages, and the manner in which it may be carried out, may be better understood by referring to the following description taken in connection with the accompanying drawings forming a part hereof, in which:

Fig. 1 is a front elevation of the pump according to the invention;

Fig. 2 is a side elevation thereof;

Fig. 3 is a section through the pump with one of its end plates removed;

Fig. 4 is a section on the line 4 3 of Fig. 3;

Fig. 5 is an enlarged vertical section through the pump; and

Fig. 6 is a detail taken on the line 6--6 of Fig. 5 and illustrating the oscillating arm.

In the following description and in the claims, various details will be identified by specific names for convenience, but they are intended to be as generic in their application as the art will permit.

Like reference characters denote like parts in the several figures of the drawings.

In the drawings accompanying and forming part of this specification, certain specific disclosure of the invention is made for purposes of explanation, but it will be understood that the details may be modified in various respects without departure from the broad aspect of the invention.

Referring now to the drawings, the pump comprises, in general, a casing l0 having a multiple inlet H, a multiple outlet l2, a rotor is and an arm I4. As the rotor 13 rotates in the direction of the arrow X in Figure 5, it sweeps fluid from the inlet l i into outlet I2, as will be explained more in detail hereinafter.

Casing 10 comprises a body l5 having side plates I E and I 1 removably secured thereto by bolts IS. The body has base flanges IS with holes 20 for hold-down bolts to fasten the pump to a support, as will be understood by those skilled in the art.

The multiple inlet I 1 comprises four bosses and passages, an upper boss 24, an end boss 23, and side bosses 25, all passages communicating with inlet chamber 2! and the inlet port M. The multiple outlet I2 comprises four similar bosses and passages, an upper boss 21, an end boss 26,

and two side bosses 28, all passages communicating with outlet chamber 22 and outlet port 42.

These multiple bosses are for the purpose of giving great facility in connecting up the supply and discharge pipes (not shown), minimizing the need for angles and elbows, so that no matter from which direction the connecting pipes lead, there is always a connecting opening directly available. The unused openings will be closed by suitable plugs, as will be understood. If desired, in certain cases either a plurality of intake feed pipes or a plurality of discharge pipes, or both together, may be connected to the multiple openings to pump fluid from or to a plurality of different points simultaneously.

The inlet port 4! is in the form of a sectorshaped chamber extending all the Way across the body l5, having a cylindrical wall 35 laid out with the center of pivot shaft 38 as a center and a flat wall 34. Flat wall 34 bounds inlet chamber 21.

The outlet port 42 is relatively shallow but extends all the way across the body 15 and has a cylindrical edge wall as laid out with the center of pivot shaft 38 as a center. Outlet port 42 has a generally flat seat (if! for arm flange 56 as will appear hereinafter. Seat so may or may not 3 be laid out with the center of shaft 32 as a center. Outlet port 52 communicates with outlet chamber 22 through slot 6|.

The cover plates 56 and l! have shaft bearings 29 and 3D to house a shaft 32 suitably keyed to rotor i3 by key 46. The shaft 32 passes through a gland Si which may be of any conventional construction to seal the shaft against leakage. The screw threads 33 for holding the gland cap may be appropriately right hand or left hand,

depending upon the direction of rotation of shaft 32, but in such direction as to prevent any loosening of the gland by rotation of the shaft.

The cover plates i3 and i1 also contain bear minimum radius indicated by it and a point of maximum radius indicated by ll. The point of maximum radius 4". is adapted to closely engage, with a sealing fit, cylindrical wall 49 of the main chamber. Extending from minimum radius 48 to maximum radius i! is the front face 49 of the rotor. Th s face represents a cam rise in that it causes tn: arm M to ride up on the cam from position 48 to position ll. The front face also acts to sweep everything before it and to discharge this substance into outlet port 22. ilarly, the rear face 58 of the cam surface extends from minimum radius 48 to maximum radius 4'! and acts as a cam fall in that it permits the arm [4 to ride downwardly as the rotor rotates. Rear surface 58 acts to suck, or draw, a load in behind it from inlet port ll.

The arm It comprises a partition wall 53 whose outer surface is laid out on a radius having as its center the center of pivot shaft 38, this cylindrical surface having a sealing fit with the 1 adjacent wall 35 of the casing. The arm also has side walls 5a through which the pivot shaft 33 passes. Side walls 54 have a space M therebetween to permit passage of fluid. These side walls 54 have a sealing fit with the walls of covers l5 and IT. The arm hi also has a projecting flange 56 having a rounded tip 51.

The sides of flange 56 have sealing fit with the side walls of covers it and i7 and the end of flange 56 cooperates with curved surface 43 53 of outlet port 42 which surface is laid out with shaft 38 as a center; the rounded tip 5'! engages the cam surface of rotor IS with sealing contact, as explained more in detail hereinafter. A spring 59 is wrapped around pivot shaft 38 and has a part 5| engaging the flat wall 34 of inlet I i and another part engaging in notch 55 of arm [4 for the purpose of continually urging the arm against the cam surface of the rotor. A sleeve 52 may surround shaft 38 to separate the convolutions of spring 59. The sleeve 52 may be a separate element as shown or may be formed integral with the main casing body l5.

In operation, the rotor it is driven by a suitable gear or other drivin device (not shown) on the end of shaft 32 in the direction indicated by the arrow X. A number of successive positions of the rotor are indicated in Figs. 3 and 5 by A. B, C and D, the latter two positions in dotted lines. In general, as the rotor is rotates, it draws Simin fluid through inlet H and discharges it out through outlet [2. The rotor it pushes everything in front of it and sucks everything behind it, and gradually raises and lowers the arm M to maintain sealing conditions between inlet and outlet.

Considering, first, the discharge cycle, this starts when the rotor is somewhat past position B (Fig. 5) just as outlet port 62 begins to be opened by dropping of arm [4 causing tip El to discontinue sealing engagement with surface 43. The chamber 39 being filled with fluid from the previous suction cycle explained below, this fluid will be pushed ahead of rotor i3 as it rotates, driving the fluid out through discharge port 12 until just before the position A in Fig. 3 is reached, when discharge stops as soon as the edge of tip 5'! approaches the lower end of surface as.

Considering now the suction cycle, suction starts just after the rotor leaves position B in Fig. 5. By the time it reaches position C (Fig. 5), it has drawn in a small amount of fluid through inlet II. By the time the rotor gets to position D (Fig. 3), it has drawn in more fluid and continues to draw in fluid until rotor reaches approximately position A (Fig. 3), in which position it has substantially filled the entire chamber 39 and this material is ready to be discharged by the front face 69 of the rotor, as explained above.

The lower surface 58 of arm Ill may be or may not be shaped to fit the cam surface of the rotor as the rotor moves from, approximately, positions B to C, but some part of arm I l between rounded tip 5'? and the arm opening 44 must be in engagement with the cam surface of the rotor at all times.

Thus a pump is provided which has only two moving parts. It permits placing inlet and outlet ports close together so as to min mize the dead point or critical zone at which no pumping action takes place. The pivoting of the arm I l positively controls its position so as to maintain the proper sealing pressure at all times between the arm and the casing. The arm is effectively held against the rotor cam surface both by the spring 59 and the difference in pressure acting on opposite sides of the arm.

The rotor surface is so shaped as to impart a smooth, gradually accelerating and decelerating oscillating motion to the arm, which may be of a harmonic nature. The rotor should be of as small a volume (distance between front face 49 and rear face 50) as is consistent with the proper shape of cam rotor surface. If desired, the strength of spring 59 and the mass of the arm may be adjusted so that the oscillating assembly will be in tune at some preferred main shaft speed, although this is not necessary.

The multiple inlet and outlet holes provide for convenient hook-up of connect ng piping and the close relationship of inlet and outlet permits location of all of these holes close together.

The pump has no valves, there is nothing to get stuck or out of order and it can handle both liquids and gases of various viscosity and fluidity. The casing, arm and rotor may be made of different materials for different uses. The pump has high volumetric emciency at low speed resulting in minimizing wear and lubrication problems. Friction surfaces are reduced to a minimum. making for long wear.

If desired, a plurality of pumps may be mounted side by side on the same shaft and if desired, the rotors of the several pump sections may have different phase relationships so that the dead center positions of various pump units will be angularly spaced from each other.

While certain novel features of the invention have been disclosed herein, and are pointed out in the annexed claims, it will be understood that various omissions, substitutions and changes may be made by those skilled in the art without departing from the spirit of the invention.

What is claimed is:

1. In a pump, a casing having a generally cylindrical chamber provided with closely associated first and second openin s, said first opening having a first cylindrical surface, said second opening having a second cylindrical surface disposed on the opposite side of said second opening from said first cylindrical surface, a rotor having a drum cam surface in said chamber and whose maximum radius has sealing contact with the cylindrical wall of said chamber, an arm bearing on said cam surface, said arm having a separating wall with a cylindrical surface contacting the adjoining first cylindrical surface and a part cooperating with the adjoining second cylindrical surface, and a pivot for mounting said arm in said casing, the axis of said pivot being the axis of said first and second cylindrical surfaces.

2. In a pump, a casing comprising a body and removable cover plates, said body having a substantially cylindrical main chamber and a sector-shaped port connecting therewith, said port having a cylindrical surface extending close to and whose continuation intersects the continuation of the cylindrical surface of said main chamber generally perpendicular thereto, said casing having substantially aligned first and second flow passages, one of which constitutes the pump inlet and the other of which constitutes the pump outlet, said fiow passages being formed wholly in said body and separated by the wall on which said port cylindrical surface is located, the line of said fiow passages being offset from the cylindrical wall of said main chamber, said first flow passage communicating with said sector-shaped port substantially tangentially thereof, a drum-shaped rotor having a cam drum surface located in said main chamber, a main shaft journaled in said cover plates and secured to said rotor, a pivot shaft located in said sector-shaped port and supported by said cover plates, an arm having a separating wall and side walls disposed in said sector-shaped port, said separating wall bearing on said cam surface and having a cylindrical surface, said wall cylindrical surface extending substantially the entire height of the separating wall and having sliding engagement with the cooperating cylindrical sector wall, the side walls of said arm being disposed close to said cover plates, said second flow passage communicating with said main chamber on the other side of said arm from said first flow passage, and spring means urging said arm against said rotor.

3. In a pump, a casing comprising a body and removable cover plates, said body having a substantially cylindrical main chamber and a sectorshaped port connectin therewith, port having a cylindrical surface whose continuation intersects the continuation of the cylindrical surface of said main chamber generally perpendicular thereto, said casing having substantially aligned first and second flow passages, one of which constitutes the pump inlet and the other of which constitutes the pump outlet, said flow passages being formed wholly in said body and being separated by the wall on which said cylindrical port surface is located, the line of said flow passages being offset from the cylindrical wall of said main chamber, said first flow passage communicating with said sector-shaped port substantially tangentially thereof, a drum-shaped rotor having a cam drum surface located in said main chamber, a main shaft journaled in said cover plates and secured to said rotor, a pivot shaft located in said sector-shaped port and supported by said cover plates, an arm havin a separating wall and side walls disposed in said sector-shaped port, said separating wall bearing on said cam surface and having a cylindrical surface having sliding engagement with the cooperating cylindrical sector wall, the side walls of said arm being disposed close to said cover plates, said second flow passage communicating with said main chamber on the other side of said arm from said first flow passage, a helical spring disposed around said pivot shaft and having legs projecting therefrom, one of said legs being disposed against an end wall of said arm, the other of said legs being disposed against an adjacent shoulder on said casing.

4. In apparatus of the class described, a casing having a substantially cylindri al chamber and first and second flow passages connecting therewith, one of said flow passages constituting an inlet and the other constituting an outlet for the apparatus, a rotor having a cam surface in said.

chamber, a pivot shaft mounted in said casing, an arm having side members mounted on said pivot shaft and a separating wall bearing against said cam surface for separating said first and second flow passages, a helical spring surrounding said pivot shaft, said spring having less projecting in the same general direction and hearing against the adjacent wall of said casing and against said separating wall.

5. In a device for handling fluids, a case having a base, a top face, opposite side faces and opposite end faces, a shaft for said rotor whose axis intersects said end faces, first and second flow passages, one of which constitutes an inlet and the other of which constitutes an outlet, said flow passages being located at the top of the case and cooperating with the rotor to operate upon the fluid, each flow passage presenting closely related multiple openings for connection to connecting pipes, the multiple openings of each flow passage having presentations on four adjacent faces of the case, one multiple opening of each flow passage being aligned with the other and facing out from an opposite side face from the other, one multiple opening of each flow passage facing out from the top face, each flow passage having aligned axially extending openings facing out from opposite end faces.

6. In a pump, a casing comprising body with a substantially cylindrical main chamber, removable cover plates closing said main chamber, a drum rotor having a cam drum surface in said main chamber, a main shaft journaled in said cover plates and secured to said rotor for driving the game, said casing having closely associated first and second flow passages communicating with said main chamber, said casing having a sector-shaped port having a cylindrical sector wall merging with said first flow passage, said second flow passage terminating in a relatively shallow port having a second cylindrical surface disposed on the opposite side of its port from said sector wall, a pivot shaft xtending across said sector port and supported by said cover plates, said pivot shaft bein located at the center on which said cylindrical sector wall is laid out, an arm having a separating wall and. side Walls disposed in said sector port, said separating wall having a cylindrical surface having sealing relationship with the cooperating cylindrical sector wall, said arm having an opening between its side Walls to allow passage of fluid therethrough, said arm being mounted on said pivot shaft and having a projecting flange, said flange ridin on said cam surface and cooperating with said second cylindrical surface to periodically close said shallow port.

JOHN N. HINCKLEY;

REFERENCES CITED The following references are of record in the file of this patent:

Number Number 8 UNITED STATES PATENTS Name Date Hodges July 28, 1885 Morris Dec. 4, 1900 Essington Dec. 15, 1903 Pratt May 18, 1909 Paine Sept. 21, 1909 Kinney Mar. 8, 1910 Dickie Dec. 6, 1910 Kinney July 2, 1912 Rasck Jan. 10, 1928 Heckert Oct. 11, 1932 FOREIGN PATENTS Country Date France Nov. 5, 1915

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