US1079560A

US1079560A - Rotary pump.

Info

Publication number: US1079560A
Application number: US73620312A
Authority: US
Inventors: Justus R Kinney
Original assignee: Individual
Current assignee: Individual
Priority date: 1912-12-09
Filing date: 1912-12-09
Publication date: 1913-11-25
Anticipated expiration: 1930-11-25

Description

2 SHEETS-*SHEET 1 Patented Nov. 25, 1913. Y

J. a, KIHNEY.

v ROTARY PUMP.

' ilPPLIflATIDH I'ILED'DEO. 9, 1912.

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J. R. KINNEY.

ROTARY PUMP.

APPLICATION FILED DEC. 9, 1912.

1,079,560. Patented Nov. 25, 1913.

2 SHVEETSSHBET 2 Wbwsscs: J hgzijenjnr:

5% us s? 62mg @444", I 8 i i JUSTUS R. KINNEY, OF "DORCHESTER, MASSACHUSETTS.

ROTARY PUMP.

Specification of Letters Patent. Application filed December 9, 1912.

Patented Nov. 25, 1913. Serial No. 736.203.

To all whom it may concern Be it known that I, JUsTUs R. KINNEY, a citizen of the United States of America, and a resident of Dorchester, in the countyof Suffolk and State of Massachusetts, have invented certain new and useful Improve ments in Rotary Pumps, of which the following is a specification.-

This invention relates to rotary umps and has for its object the provision 0 a de-' vice of this character that will operate smoothly and effectively, and at the same time be simple in construction, having comparatively few operating parts, the particular object of the invention being to provide a means for lubricating the operating parts by means of the fluid being pumped.

This invention is an improvement on pumps shown and described in two other applications of mine filed 17, 1913, and numbered761,560.

The invention consists in a rotary eccentric piston having mounted thereon an an- The invention further consists in providing the oscillating slotted member with grooves communicating with its slot thereby of the guide brackets upon their supporting therein.

The invention further consists in providing said annular member with passages extending from end to end thereof, thus permitting an equal pressure on the side of said annular member.

The invention further consists of means for obviating all end thrust on the piston shaft.

The invention consists also in providing the bearing surfaces for said oscillating slotted member with lubricating grooves adapted to contain fluid under pressure.

The invention consists further in certain novel features of construction and arrangestood by reference to the description of the respectively July 18, 1912, and numbered 710,255,v and April one point in its in said figure.

readily nnderdrawings and to the claims hereinafter given.

Of the drawings: Figure 1 represents a vertical section of a pump embodying the principles of the present invention. Fig. 2 represents a longitudinal vertical section of the same, the cutting plane being on line 2-2 on Fig. 1, and Fig. 3 represents a partial section, the cutting plane being on line 33 on Fig. 1.

Similar characters designate like parts throughout the several figures of the drawlngs.

In the drawings, 10 represents a casing supported by the feet 11 and having a cylindrical piston chamber .12 and the inlet and outlet compartments 13 and 1&1 respectively. A passage 15 forms a means of communication between the inlet compartment 13 and the piston chamber 12 while a similar passage 16 forms a means of communication between the piston chamber and theoutlet compartment. Extending through the piston chamber 12 is a shaft 17 revoluble in bearings 18 in the end plates 19 secured tothe casing 10. The shaft 17 has secured thereto within the piston chamber 12 two eccentrics 20, these two eccentrics being separated by the divisional wali 21. The eccentrics 20 are keyed to the shaft 17 and revolve therewith. Upon each of the eccentrics, is mounted an annular piston member 22 which is adapted to always contact at periphery with the cylindrical wall of said piston chamber during the rotation of the shaft 17.

Between the inlet and outlet compartments 13 and 14 is an. abutment 23 the inner end 23 of which is slightly outside of the cylindrical wall of the piston chamber 12. In this; abutment 22 is formed a cylindrical chamber 24 in which are mounted the oscillating members 25, the outer ends of which are positioned in recesses 26 in the end plates 19 as shown in Fig. 2, while their inner ends abut each other as shown Each of the oscillating members 25 has a diametrical slot 27 therethrough to which is accurately fitted "the blade 28 rigidly secured to the piston member 22. The periphery of each oscillating member 25 contacts 'with the cylindrical wall of thepiston chamber 12 so that the piston member 22 just clears said-member 25 as the former rotates in the cham- 7 her 12. During the rotation of the piston member 22 the blade 2S-Will reciprocate in the slot 27 and at the same time oscillate about the axis of the member 25.

The walls of the chamber 24 extend downwardly to a point that the outer faces of said blade 28 will reach in-eitherdirection during the oscillation thereof. The space between the piston chamber 12 and the end 23 =of the abutment 23 provides a means for preventing the pocketing of any of the material in the chamber 12 as the piston 22 revolves. The cylindrical opening 24 opens at the top into the fluid compartment 29 communicating .by means of the passage 30 with the outlet compartment 14, this passage 30 being shown only in dotted lines in Fig. 1 of the drawings. It is obvious that as a result of this opening between the outlet compartment 14: and the fluid compartment 29 the fluid contained within this compartment 29 will be at all. times under the same pressure as that contained in the outlet compartment 14.

Each bearing wall for the oscillating member 25 has cut therein a groove 31, the one on the inlet side of the pump extending only part Way down the wall, as indicated in Fig. 1 of the drawings, while the other opens into the piston chamber 12. As a result of these passages 31 the fluid under pressure is admitted thereto and is forced by means of the continued pressure thereon longitudinally of said oscillating member 25 .to thoroughly lubricate the same, and thereby permit. it to oscillate with more freedom, the tendency being to cause said oscillating member to be supported by a thin film of 'fluid under pressure. In a like manner, each side wall of the slot 27 is provided with a groove 32 extendin trans- 've'rsely thereof, the slot on the discharge side extending from end to end of said slotwhile the one on the inlet side extends only part way thereof, as shown in Fig. 1 of the drawings. By this construction fluid under pressure is admitted to either side of the blade 28, thereby thoroughly lubricating the blade, the fluid in the slots 32 bein forced laterally therefrom between the b ade 28 and the side walls of said slot 27, so that the blade will reciprocate between two thin films of fluid under pressure.

To prevent fluid from leaking by one end of the annular member 22 and creating an undue pressure on one face thereof, each annular member is provided with a plurality of openings 33 extending from end to end and communicating with annular grooves 34 in either end thereof. By this construction in case any liquid is forced between the end of an annular member and its abutting side wall, it is free to pass through the openings 33 into the opposite annular groove 34: and thus equalize the pressure on the opposite ends of said annular member. It is quite obvious that by means of this construction more freedom of movement is possible for said annular member during the rotation of the shaft 17 and its eccentric 20. ,The inner wall of each annular member- 22 is provided with the annular groove 35 which communicates by means of a passage 36, extending through said annular member adjacent to the blade '28, with the outlet compartment 14. This provides a means whereby the fluid under pressure is permitted to pass through said passage 36 into the annular groove 35, and this fluid will be forced by means of the continued pressure thereon between the periphery of the eccentric 20 and the inner wall of said annular member so that in the rotation of said eccentric 20 the annular member 22 surrounding the same will be sustained bya thin film of fluid, thus reducing the friction to a minimum. In a similar manner, oppositely opposed grooves 36* are cut longitudinally of the inner walls of the bearings 18, thereby permitting the fluid entering the said grooves to thoroughly lubricate the shaft 17 revoluble therein. In order to take care of anyend thrust upon said shaft 17 a passage 37 is provided in the periphery of the right hand bearing 18, this passage 37 communicating with the radial passage 38 cut into the inner wall of the right hand end plate 19 so that any fluid entering the passage 36 will be given an opportunity to be discharged therefrom into the inlet portion of the piston chamber 12 in an. obvious manner.

By means of the various grooves provided in connection with the operating parts of the device, all of said operating arts are thoroughly lubricated by the fluid being pumped, and as this fluid is forced into the various grooves and passages under pressure the tendency is to cause the various workin parts to operate between thin films of said fluid, thus giving much more freedom of action than could possibly be secured where the solid bearing surfaces move in contact with one another.

It is believed that the operation and many advantages of a pump as herein shown and described will be fully apparent without further description.

Having thus described my invention, I claim:

1. In a device of the class described, the combination of a casing provided with an inlet compartment, an outlet compartment, a cylindrical chamber between said compartments, and a cylindrical piston chamber lating member.

. grooves in the ed to contain fluid under pressure the grooves in one wall extending the full diameter of said member and in the other .wall a lesser distance; a rotary shaft centrally disposed in said piston chamber; an eccentrio thereon; adapted to contact at one point thereof with the wall of said piston chamber; and asolid blade rigidly secured to said piston member and extending through the slot in said oscil- 2. In'a device of the class described, the combination of a casing provided with a cylindrical piston chamber having an inlet passage and an outlet passage communicating therewith, said casing being also provided with. a cylindrical recess interposed between said passages and having two wall thereof adapted to contain fluid under pressure, one of said grooves being open at both ends While the other is open at one end only; an oscillating slotted member in said recess having two grooves in the opposite walls of said slot, one of said grooves being open at both ends .while the other is open at one end only; and a rotary eccentric piston in said piston chamber provided with a blade rigidly secured thereto extending through and accurately fitting the slot in said oscillating member.

3. In a device of the class described, the combination'of a casing provided with a cylindrical piston chamber having inlet and outlet passages communicating therewith; a rotary eccentric piston in said chamber provided with a radial blade rigidly secured thereto; and a slotted oscillating member through the slot of which said blade extends, said member having grooves in the bearing walls of its slot the one on the discharge side extending to the piston chamber and the other extending from the upper end of said slot to a point removed from said piston chamber.

4. In a device of the class described, the combination of a casingprovided with a cylindrical piston chamber having an inlet passage and an outlet passage communicating therewith, a rotary eccentric piston in said piston chamber pro-vided with a blade interposed between said inlet and outlet passages and preventing the flow of fluid from one to the other; a rotary shaft for said pis-' ton; and a bearing for the end of said shaft provided with a groove extending longitudinally of its inner wall and a groove communicating therewith extending longitudinally of its periphery and communicating with the piston chamber.

an annular piston member' chamber;

5. In a device of the class described, the combination of a casing provided with a cylindrical piston chamberhaving an inlet passage and an outlet passage communicating therewith; a rotary sha t centrally disposed in said piston chamber; an eccentric thereon; and an annular member having a radial blade interposed between said passages, said annular member being provided with an annular groove in its inner cylindrical wall communicating with the discharge passage whereby fluid under pressure may be admitted to the space and annular memberand confined therein.

6. In a device'of the class described, the combination of a casing-provided with a cylindrical piston chamber having an inlet passage and an outlet passage communicating therewith, a fluid compartment communicating withsaid outlet passage, and a cylindrical chamber interposed between said compartment and. piston chamber and combetween said eccentric municatingwith both; an oscillating slotted member in said cylindrical chamber; a rotary shaft centrally disposed 1n said piston an eccentric thereon; and an annular -member on said eccentric provided with a blade integral therewith extending through the slot in said oscillating member. 7. In a device of the class described, the combination of a casing provided with a cy lindrical piston chamber having an inlet 1 passage and an outlet-passage communicating therewith, a fluid compartment communicating with said outlet passage, and a cylindrical chamber interposed between said compartment and piston chamber, said chamber having an open groove in the wall thereof on the discharge side extending to said piston chamber and a closed groove in the opposite wall thereof extending from said fluid compartment; an oscillating slotted member in said cylindrical chamber having an open roove in the discharge side of its slot extending to said piston chamber and a closed groove in the opposite wall of said slot extending from said fluid compartment; a rotary shaft centrally disposed in said piston chamber; an. eccentric thereon; and an annular member on said eccentric provided with a blade integral therewith ex= tending through the slot in said oscillating member. 1

Signed by me at Boylston St, Boston. Mass, this 26thday of August, 1912. Y JUSTUS R. KINNEY. Witnesses: A

WALTER E. LOMBARD, NATHAN C. LOMBARD.