US1418741A

US1418741A - Rotary pump or compressor

Info

Publication number: US1418741A
Application number: US431339A
Authority: US
Inventors: Granville H Stallman
Original assignee: Individual
Current assignee: Individual
Priority date: 1920-12-17
Filing date: 1920-12-17
Publication date: 1922-06-06
Anticipated expiration: 1939-06-06

Description

e. H. STALLMAN.

ROTARY PUMP 0R COMPRESSOR.

APPLICATION FILED DEC. 17, 1920- 1,418,741 tented June 6, 1922.

GRANVILLE H. STALLMAN, OF CHICAGO, ILLINOIS.

ROTARY PUMP OR COMPRESSOR.

Specification of Letters Patent. Patented June 6, 1922,

Application filed December 17, 1920. Serial No. 431,339.

To a w]: om it may concern:

Be it known that I, GRANVILLE H. STALL- MAN, a citizen of the United States, residing at Chicago,- in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Rotary Pumps or Compressors, of which the following is a specification.

This invention relates to improvements in a rotary pump or compressor, particularly adapted though not necessarily limited in its use for moving or handling fluids or plastic materials, and one of the objects of the invention is to provide an improved apparatus of this character which will be simple in construction, effective and eflicient in operation. and economical in power.

A further object is to provide an improved apparatus of this character embodying two co-operating and inter-meshing rotary elements so shaped as to alternately form closed pockets in the elementsand in which pockets portions of the material are first trapped, then subjected to a gradually increasing pressure while in the pocket and finally ejected from the respective pockets as the pockets assume predetermined positions with relation to a discharge outlet passage.

To the attainment of these ends and the accomplishment of other new and useful objects as will appear, the invention consists in the features of novelty in substantially the con truction, combination and arrangement of the several parts hereinafter more fully described and claimed and shown in the accompanying drawing illustrating this invention, and in which Figure 1 is a vertical sectional view as taken on line 1- Figure 2, of a machine adapted to pump compressible materials.

Figure 2 is a horizontal view as taken on line 22, Figure 1.

Figure 3 is a view of the machine for handling incompressible materials.

In the specification and claims the invention will be described in connection with the moving or compressing of a fluid, but it is to be understood that this invention and the same principle thereof is well adapted for use in moving or handling plastic materials, as for instance the apparatus may be effectively employed as a stufiing machine, and it is therefore to be understood that the term fluid as used throughout the specification and claims, for the sake of uniformity, is not to be construed to be a term of limitaing 12.

hlS casing 10, may be of any desired size and configuration.

Rotatably mounted within the casing are elements l3-14, and these elements are respectively provided with a series of circumferentially spaced teeth or projections 15-46, and the elements are so arranged that these teeth or projections will mesh. The teeth or projections are formed preferably with substantially circular shaped extremi ties 17, the throats 18, of the teeth being reduced so as to form pockets or chambers 19, intermediate adjacent teeth or projections and at the base thereof. The ends 17 of the teeth or projections 16, are of a size and configuration so as to conform to the contour of the pockets 19, so that when they enter the respective pockets they will fill the pockets for a purpose to be hereinafter set forth. Y

The elements are respectively mounted for rotation upon hollow shafts 20-21, which project through one end 22, of the casing 10, suitable packing 23, being provided to prevent the escape of fluid. These hollow shafts 20-21 are preferably connected at their free extremities by means of a manifold 24, having a common discharge outlet 25, suitable couplings 26, being employed in connecting the manifold with the shafts. These shafts 2021 project into the respective elements 1314 for any desired distancebut preferably terminate short of one end of the respective elements so that a portion of the elements will form closures 2728 for the ends of the shafts, and the shafts are respectively provided with openings 2930 extending radially therethrough and in directions lengthwise of the shaft The elements 1314 may be of any desired length and are arranged within a chamber 29 formed within the casing 10, by means of a wall- 31, which co-operates with the end 22, of the casing. The outer wall of the casing is projected beyond the wall 31, and is closed by another wall 32, to form a chamber 33. The elements 13-14 are respectively provided with trunnions' 34 -35, which pass through the wall 31 and are journaled in suitable bearings 36-37 arranged within the chamber 33, and connected with these trunions 3435, are intermeshing gears 38-39, which are given rotation through the medium of a shaft 40, from any suitable source of power. The pinions when thus rotated will impart a rotary movement to the elements 13-14. A suitable packing 41, may be provided for the shaft 40.

Each of the pockets 19, is provided with a discharge opening 42, leading therefrom and as the elements 13-14 are rotated the discharge openings 42, from the pockets will be successivel brought into and out of engagement with the respective openings 29- 30, in the

shafts

20, 21 to establish communication between the pocket and the discharge outlet 25.

In use the fluid is supplied to the casing 10, through the inlet opening 12, and as the elements 13-14 are rotated the teeth or projections 15-16 on the respective elements 13-14, will be successively pro ected into the pockets 19, of the other element w1th the result that these projections or teeth 15-16, will first close the pockets to trap portions of the fluid in the pockets and a continued rotation of the elements will cause a gradually increasing pressure to be exerted upon the trapped fluid in the pocket while the projection on one element is entering the pocket in the other element. This gradually increasing pressure which has thus been exerted u on the trapped fluid will continue until t e respective elements 13-14 are moved to a positlon that the discharge outlet 42, thereof is brought into register or in communication with the discharge outlet 25, through the medium of the respective openings 29-30, in the shafts 20-21, at which time the tooth or projection will continue to enter the pocket and fill the pocket while at the same time the trapped fluid in the pocket will be ejected through the discharge outlet 42.

It will thus be seen that as the elements 13-14 are rotated the operation above described will continue and the fluid will be compressed and ejected alternately from the pockets in the two elements.

Obviously the various ports of this apparatus will be correspondingly arranged according to the material which isbeing handled thereby, so as to compensate the different natures of the material.

In Figure 3, the ports 29 and 30' in the

respective pipes

20 and 21 are enlarged so as to avoid compression in the pockets 19 before the material is dischar ed therefrom.

While the preferred form 0 the invention has been herein shown and described it is to be understood that various changes may be made in the details of construction and in the combination and arrangement of the several parts, within the scope of the claims, without departing from the spirit of this invention.

What is claimed as new is:

.1. An apparatus of the character described embodying a fluid receiving casing having an inlet and a discharge outlet, a rotary element in the casing provided with recesses formin chambers, said chambers each having a dlscharge outlet movable into ,and out of communication with the first said discharge outlet, and means co-operating with the said chambers for closing them, the said means operating to compress the fluid within the chambers when the discharge outlet thereof is out of communication with the first said outlet, and also operating to force the fluid from the chamber when the said outlets are brought into communication.

2. An apparatus of the character described embodying a casing, having an inlet and a discharge outlet for the fluid to be operated upon, a rotary element in the casing provided with independent chambers or spaces for receiving the fluid, said chambers each having a discharge outlet, the last recited outlets being movable into and out of communication with the first recited outlet as the element is rotated, and means operating to first successively close the chambers to trap the fluid therein and then compress the fluid within the chamber when the outlet therefrom is closed, the said means moving with the chamber to eject the fluid therefrom when the outlet of the chamber moves into communication with the first recited outlet.

3. An apparatus of the character described embodying a casing, having an inlet and a discharge outlet for the fluid to be operated upon, a rotary element in the casing provided with independent chambers or spaces for receiving the fluid, said chambers each having a discharge outlet, the last recited outlets being movable into and out of communication with the first recited outlet as the element is rotated, and means operating to first successively close the chambers to trap the fluid therein and then compress the fluid within the chamber when the outlet therefrom is closed, the said means moving with the chamber to eject the fluid therefrom when the outlet of the chamber moves into communication with the first recited outlet, the said means embodying a rotary element having spaced peripheral teeth or projections conforming to the contour of the chambers and adapted to enter and fill the said chambers.

4. An apparatus of the character described embodying a casing, having an inlet and a discharge outlet for the fluid to be operated upon, a rotary element in the casing provided with independent chambers or spaces for receiving the fluid, said chambers each having a discharge outlet, the last recited outlets being movable into and out of communication with the first recited outlet as the element is rotated, means operating to first successively close the chambers to trap the fluid therein and then compress the fluid within the chamber when the outlet there from is closed, the said means moving with the chamber to eject the fluid therefrom when the outlet of the chamber moves into communication with the first recited outlet, the said means embodying a rotary element having spaced peripheral teeth or projections conforming to the contour of the chambers and adapted to enter and fill the said chambers, means for rotating one of the elements and means operatively connecting the said elements.

- 5. An apparatus of the character described embodying a fluid receiving casing having an inlet and a discharge outlet,-complementary rotatable elements each being provided with circumferentially spaced projections to form chambers therebetwecn, each of the chambers having a discharge outlet opening movable into and out of communication with [the first recited discharge outlet, and means for causing rotation of the elements. the said projections on each of the elements co-opcrating with the chambers on the other element to first close the respective chambers to trap the fluid therein, then compress the fluid during that portion of the operation of the respective elements that the. discharge outlet from the respective chambers is out of communication with the first recited outlet, and then discharge the fluid from the respective chambers when the respective outlets move into communication with the first recited outlet.

6. An apparatus of the character described embodying a fluid receiving casing having an inlet and a discharge outlet. con1plementary rotatable elements each being provided with circumferentially spaced projections to form chambers therebetween, each of the chambers having a discharge outlet opening movable into and out of communication with the first recited discharge outlet, and means for causing rotation of the elements, the said projections on each of the elements co-opcrating with the chambers on the other element to first (close the respective chambers to trap the H lid therein, then compress the fluid during that portion of the operation of the respective elements that the discharge outlet from the respective chambers is out of communication with the first recited outlet, and then discharge the fluid from the respective chambers when the respective outlets move into communication with the first recited outlet, the first recited discharge outlet embodying hollow shafts individual to 7 An apparatus of the character describedembodying a fluid receiving casing having an inlet and a discharge outlet, complementary rotatable elements each being provided with circumferentially spaced projections to form chambers therebetween, each of the chambers having a discharge outlet opening movable into and out of communication with the first recited discharge-outlet, and means for causing rotation of the elements, the said projections on each of the elements cooperating with the chambers on the other element to first close the respective chambers to trap the fluid therein, then compress the fluid during that portion of the operation of the respective elements that the discharge outlet from the respective chambers is out of communication with the first recited outlet, and then discharge the fluid from the respective chambers when the re spective outlets move into communication with the first recited outlet, the first recited discharge outlet embodying hollow shafts lndlvidual to the elements and upon which the respective elements rotate, there being an opening through each of the shafts and extending in directions lengthwise thereof, the last recited openings of the said shafts being so disposed with relation to each other that the pocket outlet openings of the two members will be alternately brought into communication with the first recited outlet.

8. An apparatus of the character described embodying a fluid receiving casing having an inlet and a discharge outlet, a pair of toothed rotary elements in the casing, said elements meshing with each other, the spaces between adjacent teeth of each of the members forming fluid pockets, there being a discharge outlet leading from each pocket and movable into and out of communication with the first recited outlet, the teeth of each element co-operating with the pockets of the other element to first close the pockets to trap the fluid therein, then compress the fluid when the discharge outlets of the respective pockets are closed, and then veject the fluid from the pocket when the outlet therefrom is in communication with the first recited discharge outlet, and means for rotating the elements.

9. An apparatus of the character described embodying a fluid receiving casing having an inlet and an outlet, a pair of toothed meshing rotary elements in the casing, portion of each element between adjacent teeth being shaped to form fluid pockets, there being a discharge outlet from each pocket movable into and out of communication with the first recited outlet, said teeth of each member being shaped to'conform to the contour of and fill the respective pockets of the other member whereb when the members are rotated the teeth will 'rst close the respective pockets to trap the fluid therein. then exert a gradually increasing pressure upon the fluid as the tooth enters the pocket during the period that the outlet from the pocket is out of conmmnication with the first recited outlet. and then eject the fluid from the pocket when the outlet therefrom is in communication with the first recited outlet, and when the tooth completely fills the pocket.

10. An apparatus of the character described embodying a fluid receiving casing having an inlet, a toothed like rotatable element having pockets intermediate the teeth, said pockets each having a discharge outlet, means co-operating with the pockets for closing them to trap liquid therein and exert a gradually increasing pressure upon the liquid. and means adjacent the axis of rotation of the element whereby the said discharge outlets from the pockets are closed during a predetermined portion of the rotation of the element and are opened during another predetermined portion of the rota tion of the element to permit the discharge of the fluid from the pocket.

11. An apparatus of the character described embodying a fluid receiving casing having an inlet. a rotatable element having pockets intermediate the teeth, said pockets each having a discharge outlet, means cooperating with the pockets for closing them to trap liquid therein and exert a gradually increasing pressure upon the liquid. and means adjacent the axis of rotation of the element whereby the said discharge outlets from the pockets are closed during a predetermined portion of the rotation of the element and are opened during another prede termined portion of the rotation of the element to permit the discharge of the fluid from the pocket, the second recited means embodying a passageway for receiving the fluid from the discharge outlets of the pockets.

12. An apparatus of the character described embodying a casing for receiving fluid, and having an inlet, a pair of toothed like rotatable intermeshing elements each having pockets intermediate adjacent teeth, each of the pockets having a discharge outlet therefrom, the teeth of each element cooperating with the pockets of the other element to close them to trap fluid therein and exert a gradually increasing pressure upon the fluid, and means adjacent the axes of rotation of the elements whereb said discharge outlets from the pockets will be closed during a predetermined portion of the rotation of each element and will be open during another predetermined portion of rotation of each element to permit the discharge of the fluid from the respective pockets.

13. An apparatus of the character described embodying a casing for receiving fluid, and having an inlet, a 'pair of toothed like rotatable intermeshing elements each having pockets intermediate adjacent teeth, each of the pockets having a discharge outlet therefrom. the teeth of each element cooperating with the pockets of the other element to close them to trap fluid therein and exert a gradually increasing pressure upon the fluid, and means adjacent the axes of rotation of the elements whereby said discharge outlets from the pockets will be closed during a predetermined portion of the rotation of each element and will be open during another predetermined portion of rotation of each element to permit the discharge of the fluid from the respective pockets. the said means embodying passageways for receiving the fluid alternately from the discharge outlets of the pockets, the said passageways having a common delivery outlet.

14. An apparatus of the character described embodying a fluid receiving casing having an inlet and a discharge outlet. a rotary element in the casing provided with recesses forming chambers, said chambers each havin a discharge outlet movable into and out of communication with the first said discharge outlet, and means co-operating with the said chambers for closing them, the said means operating to force the liquid from the chamber when the outlets are brought into communication.

In testimony whereof I have signed my name to this s ecification on this 11th day of December, D. 1920.

GRANVILLLE H. STALLMAN.