US2789513A

US2789513A - Fluid pump

Info

Publication number: US2789513A
Application number: US554759A
Authority: US
Inventors: Chester W Johnson; Clarence T Keogh
Original assignee: Individual
Current assignee: Individual
Priority date: 1955-12-22
Filing date: 1955-12-22
Publication date: 1957-04-23
Anticipated expiration: 1974-04-23

Description

c. w. JOHNSON ET AL 2,789,513

FLUID PUMP April 23, 1957 2 She'ets-Sheet 2 Filed Dec. 22, 1955 III/I/Illlll II II:

mm EZIEUTLTLJT INVENTORS Cf/EJfEB Ml/fl/M/SO/l w m K .M F e 0 E A e a United States Patent "ice FLUH) PUMP Chester W. Johnson, Butte, and Clarence T. Keogh,

Whitehall, Mont.

Application December 22, 1955, Serial No. 554,759

3 Claims. (Cl. 103-136) The present invention relates to fluid pumps.

An object of the present invention is to providea fluid pump which is double acting and reversible, and one which may be used as a fluid motor.

Another object of the present invention is to provide a fluid pump of the rotor and vane type which has means for preventing the wear on the ends of the vanes normally encountered in rotor and vane pumps.

A further object of the present invention is to provide a fluid pump of simple structure, one sturdy in construction, one economical to manufacture and assemble, and one which is highly eflicient in action.

These and other objects and advantages of the present invention will be fully apparent from the following description when taken in connection with the annexed drawings, in which:

Figure 1 is an elevational view of the fluid pump of the present invention, with the front cover partially broken away and with a portion in section,

Figure 2 is a sectional view taken on the line 2-2 of Figure 1,

Figure 3 is a sectional view, on an enlarged'scale, taken on the line 3--3 of Figure 2,

Figure 4 is a sectional view taken on the line 4-4 of Figure 3,

Figure 5 is a sectional view, on an enlarged scale, taken on the line 55 of Figure 2, and

Figure 6 is an exploded view of the components of the fluid pump of the present invention.

Referring in greater detail to the drawings in which like numerals indicate like parts throughout the several views, the fluid pump of the present invention comprises a closed cylindrical housing 10 having diametrically opposed abutments 11 and 12 on the inner surface of the wall of the housing 10. The housing has a front wall 13 and a rear wall 14. A shaft 15 is journaled in the rear wall 14 and has an end portion 16 axially disposed in the housing 10. A rotor 17 provided with a hollowedout end face is circumposed about the shaft end portion 16 and is fixedly secured thereon for rotation with the shaft 15. The rotor 17 is fixed to the shaft end portion by means of a key 18, shown in dotted lines in Figure 2, and by means of a nut 19, the shaft end portion 16 having suitable threads thereon for receiving the nut 19. The rotor 17 wipingly contacts the abutments 11 and 12 successively as it rotates. The rotor 17 is provided with a plurality of slots 20 which extend in radial spaced relation about the rotor 17.

A fixed shaft 21 projects perpendicularly from the inner surface of the front wall 13 of the housing 10 and extends into the rotor 17. A tubular member 22 is supported on the fixed shaft 21 for rotation about the latter as an axis.

A plurality of sleeves 23 are disposed in side by side relation along the tubular member 22. Eccentric means is provided on the tubular member 22 connecting each of the sleeves 23 to the tubular member 22 so as to provide eccentric bearing portions on the tubular memher for independent rotational movement therearound' The eccentric means embodies a plurality of circular bearing surfaces 24, six in number, each disposed eccentrically with respect to the shaft end portion 16 and with respect to each other.

A vane 25 projects radially from each sleeve 23 and is pivotally connected thereto by means of a socket 26 on the inner end of the Ivane 25 and a ball formation 27 received in the socket 26. The ball formation 27 is on the outer end of an arm 2'8 which projects from the associated sleeve 23. The socket 26 .and the ball formation 27 permit pivotal movement of the vane relative to the arm 28 and therefore relative to the sleeve 231 Each of the vanes 25 is slidably mounted in one of the slots 20 of the rotor 17. 1

Means is provided operatively connected to the tubular member 22 for effecting the rotation of the tubular member 22 in a direction opposite to the direction of rotation of the shaft 15. Specifically, such means comprises a spur gear 29 secured to or formed integrally with the base portion 30- of the tubular member 22. A pair of stub shafts 31, each provided with a threaded end .por-n tion and a slotted head, are th-readedly secured to the front Wall 13 of the housing 10 and each supports a pair gears 32 is in mesh with the spur gear 29 and the spur gears 33 are in mesh with a ring'gear 34 which is provided on the adjacent portion of the rotor 17.

An inlet 35 and an outlet 36 arearranged in spaced relation in the portion of the wall of the housing 10 on each side of and between the abutments 11' and 12. The part of the housing wall between the adjacentinlet 35 and the outlet 36 and the adjacent portion of the rotor 17 defines a pump chamber. The inlets 35 and 36 are shown in dotted lines in Figure 1.

In operation, the shaft 15 is connected to a sourceof rotative power, theinlets 35 are connected to a fluid source, and the outlets 36 are connected to a point of discharge for the fluid. Upon rotation of the shaft 15 in one direction, the

gears

29, 32, 33, and 34 cause thetubular member 22 to rotate in the other direction and at the same rotational speed as the rotor17. The vanes 25 are carried by the rotor as the latter rotates and each successively extends into the pump chambers closing the latter and effecting a pumping action therein. The dimensions of the sleeves and the vanes and the connecting arms are such that the vanes do not bear against the inner surface of the housing 10 but have a close tolerance therewith. Due to the fact that the sleeves 23 are carried about the tubular member 22 and rotate about axes which are eccentric with respect to the rotor 17 and with respect to each other, the pivotal connection of the ball formation on the end of each arm 28 and the socket 26 on the vanes 25 permits a limited swinging movement, as shown in Figure 5 and indicated in the dotted lines, of the vanes with respect to their associated sleeves. The pump chambers are designated by the reference numerals 37 and 38 on the right and left sides of Figure 1, respectively. Flat-headed bolts 39 secure the rear wall 14 and the front wall 13 to the housing 10.

What is claimed is:

1. A fluid pump comprising a closed cylindrical housing having diametrically opposed a'butments on the inner surface of the wall thereof, a shaft rotatable in one direction and having an end portion axially disposed in said housing, a hollow rotor circumposed about said shaft end portion and connected to the latter for rotation therewith, said rotor in its rotational travel successively wipingly contacting said housing abutments, there being a plurality of slots in said rotor extending in radial spaced relation therearound, a fixed shaft car- Patented Apr. 23, 1957 outlets ried by said housing and extending into said rotor, a tubular member supported on said fixed shaft for rotation about the latter as an axis, a plurality of sleeves disposed in side by side relation along said tubular member. and connected to said tubular member so as to provide eccentric bearing portions on said tubular member, .11 vane projecting radially from each of said sleeves and slidable in a slot of said rotor, means operatively connected to said tubular member for effecting the rotation of the latter in a direction opposite to the direction of rotation of said rotatable shaft, and an inlet and an outlet arranged in spaced relation in the portion of the wall of said housing on each side of and between said abutments, the parts of the inner surface of the housing wall between the adjacent inlet and outlet being spaced from the adjacent portion of said rotor defining a pump chamber, said vanes successively extending into and closing each of said pump chambers in turn upon execution of the rotational travel of said rotor.

2. A fluid pump comprising a closed cylindrical housing having diametrically opposed abutments on the inner surface of the wall thereof, a shaft rotatable in one direction and having an end portion axially disposed in said housing, a hollow rotor circumposed about said shaft end portion and connected to the latter for rotation therewith, said rotor in its rotational travel successively wipingly contacting said housing abutments, there being a plurality of slots in said rotor extending in radial spaced relation therearound, a fixed shaft carried by said housing and extending into said rotor, a tubular member supported on said fixed shaft for rotation about the'latter as an axis, a-plurality of sleeves disposed in side by side relation along said tubular member, an eccentric means on said tubular member connecting each of said sleeves to said tubular member so as to provide eccentric bearing portions for independent rotational movement therearound, a vane projecting radially from each of, said sleeves and slidable in a slot of said rotor, means operatively connected to said tubular member for effecting the rotation of the latter in a direction opposite to the direction of rotation of said rotatable shaft, and an, inlet and an-outlet arranged in spaced relation in theportion of the wall of said housing on each side of and between said abutments, the parts of the inner surface of the housing wall between the adjacent inlet and outletbeing spaced from the adjacent portion of said 4 rotor defining a pump chamber, said vanes successively extending into and closing each of said pump chambers in turn upon execution of the rotational travel of said rotor.

3. A fluid pump comprising a closed cylindrical housing having diametrically opposed abutments on the inner surface of the wall thereof, a shaft rotatable in one direction and having an end portion axially disposed in said housing, a hollow rotor circumposed about said shaft end portion and connected to the latter for rotation therewith, said rotor in its rotational travel successively wipingly contacting said housing abutments, there being a plurality of slots in said rotor extending in radial spaced relation therearound, a fixed shaft carried by said housing and extending into said rotor, a tubular member supported on said fixed shaft for rotation about the latter as an axis, a plurality of sleeves disposed in side by side relation along said tubular member and connected to said tubular member so as to provide eccentric bearing portions on said tubular member, a vane projecting radially from each of said sleeves and pivotally connected thereto and slidable in a slot of said rotor, means operatively connected to said tubular member for effecting the rotation of the latter in a direction opposite to the, direction of rotation of said rotatable shaft and at the same rotational speed as said rotatable shaft, and an inlet and an outlet arranged in spaced relation in the portion ofthe wall of said housing on each side of and between said abutments, the parts of the inner surface of the housing wall between the adjacent inlet and outlet being spaced from the adjacent portion of said rotor defining a pump chamber, said vanes successively extend-. ing into and closing each of said pump chambers in turn upon execution of the rotational travel of said rotor.

References Cited in the file of this patent UNITED STATES PATENTS 461,612 Nichols Jan. 26,1892 1,104,331 Tree July 21, 1914 1,852,503 Campbell Apr. 5, 1932 1,922,797 Eyston Aug. 15, 1933 23 11,139 Ballard Aug. 13, 1935 2,071,258 Haydock et al. Feb. 16, 1937 2,124,918 Hanson July 26, 1938