US1727081A - Oil-pump construction - Google Patents

Description

Sept. 3, 1929. c. L RAYFIELD 1,727,081

OIL. PUIIP CONSTRUCTION Filed Nov. 5, 1927 i In 30 1 5 55 l 1 12213 2235;

V 25 60 [56 i4 \\s 35 m 59 .7

Patented Sept. 3, 1929.

UNITED STATES PATENT OFFICE.

CHARLES L. RAYFIELD, OF CHICAGO, ILLINOIS, ASSIGNOR T0 RAYFIELD MANUFAC- TUBING COMPANY, A CORPORATION OF ILLINOIS.

OIL-PUMP CONSTRUCTION.

Application filed November 5, 1927. Serial No. 231,184.

My invention relates to pumps, and more particularly to a rotary pump of that type wherein a pivotally mounted ring member is actuated by an eccentric to force the fluid from the pump.

It has been the practice heretofore in a rotary pump of the above character to provide a link connection for the ring member of the pump adapted to prevent this member from rotating with the eccentric disposed therein and also adapted to permit of the ring member having an oscillatory motion. 1 have found that this link construction is not only relatively expensive to make, but also involves expensive machining opera- .tions in order to properly fit it to the cylinder of the pump, as well as to the oscillatory ring member. Then, too, this construction is not very satisfactory for the reason that it is exposed to considerable wear, and hence is detrimental to the efficiency and longevity of the pump.

It is, therefore, the object of my invention to provide an improved rotary pump, wherein the above mentioned linkage is eliminated and a novel and inexpensive pivotal mounting is provided for the ring member actuated by the eccentric.

Another object of the invention is to provide a relatively simple and inexpensive rotary pump construction capable of handling small quantities of fluid with relatively high efficiency, and especially adapted for use in connection with the pumping'of fuel for oil burners or the like.

In accordance with the general features of the present invention, I provide a rotary pump including a cylinder having inlet and outlet passageways, a rotary eccentric member disposed in the cylinder, a ring or pressure member fitted on the eccentric and adapted to be oscillated thereby, and a pin anchored in the cylinder and extending through an opening in the edge of the ring member, the ring member being adapted to pivot about the pin to force liquid from the inlet passageway into the outlet passageway. This pin construction is of a very simple and inexpensive nature and not only serves as a vmounting for the ring member, but also serves as a barrier between the inlet and outlet passageways to prevent leakage therebetween.

Other objects and advantages of my invention will more fully appear from the following detailed description taken in connection with the accompanying drawing,

. which illustrates a single embodiment thereof and in which:

Figure 1 1s a fragmentary vertical sectional View through the rotary pump of my invention; 7

Figure 2 is a cross-sectional view taken on substantially the line IL-II of Figure 1 looking in the direction indicated by the arrows;

Figure 3 is a cross-sectional view taken on showing the positions of the eccentric and ring member during the discharge stroke of the pump.

In the drawings:

Like reference characters designate similar parts throughout the several views.

The reference character 10 designates generally a pump block which includes an annular end member or plate 11. Extending through the block 10 is a shaft 12 which may be actuated by any suitable source of power. 2 V

This shaft extends through a bore 13 of a larger diameter than that of the shaft. Disposed in the bore 18 and surrounding the shaft 12 is a packing 14 which is held in place by means of a bearing box 15 and a packing box 16. It will be noted that an end of the shaft 12 projects outwardly beyond the annular member 11.

Surrounding the shaft 12 and positioned flush with the end member or plate 11 is a flat member 18 which comprises the cylinder of the pump. The cylinder 18 is secured to the plate or member 11 by an end plate 20 through the means of bolts 19 which extend through the plate 20, the cylinder 18, and to themember 11. The end plate 20 has formed integral with it a central hollow boss 21 in which the associated extreme end of shaft 12 is journaled,

The cylinder 18 has a central or concentric opening 22 which defines the pump chamber. Disposed within this opening 22 is what 1 term a ring member 23 which has a diameter slightly less than the diameter of the opening 22. Rotatably fitted in the ring member 23v eter that it is adapted to fill up substantially the entire groove 26, but yet at the same time permit of a pivotal movement of the ring member 23. One end of this pin 28, as best shown in Figure 1, is tightly fitted in an 29 in end member openin 11 of the pump block 10. The other end of the pin 28 is tightly fitted in an opening 30 formed in end plate 20. This pin 28 is tightly held in these two openings 29 and 30, against movement. Moreover, it will be noted. that the end plate is properly aligned with end member 11 through the means of dowel pins 30.

The ring member 23 also has formed in it a pair of oil openings 31 and 32, one being disposed on each side of groove 26. These oil openings permit of some of the oil being pumped reaching the eccentric 24;, whereby the pump is self-lubricating. Of course, it is to be understood that my novel pump may be used to pump other fluids besides oil without deviating from the features of my invention. Obviously if it is used to pump another fluid, the openings 31 and 32 should be omitted. The pump block 10 has formed integral with it a pair of lateral extensions 33 and 3a,

in each of which is a threaded opening 3536.

The opening 35 comprises the inlet of the pump, and the opening 36 comprises the outlet of the pump. shown) may be threaded into these openings 35 and 36. The inlet 35 is disposed in communication with a passageway 37 (Figure 2) formed in the block 10. This passageway is closed off at its lower end by a plug 38 threaded therein. The upper end of the passageway 37 intersects an opening 40 which extends clear through the plate 1].. It will, of course,

7 be understood that when the ring 23 is in either the position shown in Figures 3 or 5, the opening 40 will be disconnected from the pump chamber or opening 22.

The opening 36 is disposed in communication with a passageway 4-2 which has a closure plug 43 threaded into its lower end. The upper endof the passageway 42 communicates with an opening a3 which also eXtends clear through the member 11 and has its outer end in register with the pump chamber or opening 22. The opening 43 has anenlarged portion-41 (Figure 3) which communicates with the annularopening 22 in the cylinder 18; Of course it must be noted that when the ring Suitable pipelines (not substantially flush with the outer surface of member or plate 11. This box is held against rotation by means of a setscrew t5 threaded into the block 10, as shown in Figure 1.

The oieration of m novel rotar Quinn will now be briefly discussed in COllIlGQLlOIl with Figures 3, 4 and 5, which illustrate the various phases of the operation of the pump. When the eccentric 24 is in the position shown in Figure 3, it causes the ring member l 23 to assume a position whereinthe pin 28 is disposed entirely within the groove or slot 26. thus result 'ng in both of the openings {L0 and 43 being c sconnected from the chamber or opening 22. The rotation of the shaft 12 in 7 a clockwise direction will result in the eccentrie 24- traveling from the position shown in O L l gure o to the position shown in h igure 5. lVhen the ring member 22 is in this position, it will have been movedout of register with opening 40, whereby this opening is disposed in communication witl the pump chamber 22.

'Obviously this movement of the eccentric 24 will result in fluid being drawn into the pump through the opening 40 from the inlet 35.

Continued rotation of the eccentric 2 L will cause it to assume the position shown in Figure 4, wherein the chamber 22 is connected through the opening 43 with the outlet 36, thus allowing the fluid to be forced from the pump chamber. Thereafter the eccentric 24. travels through the two positions shown and described in connection with Figures 3 and 4, thus resulting in the entry of a fresh batch of liquid into the pump.

The ring-like member 23 is prevented from rotating with the eccentric 24: due to the fixed pin 28 extending into the slot 26. This arrangement is such that it permits of the ringlike member 23 having the oscillatory move-' ment previously described in connection with Figures 3, 4 and 5. Also it will be noted that the pin 28 (Figure is disposed between the openings 43 and 40 and has its periphery 111 contact with the wall of ring member 23 de-' fining the chamber Therefore, it necessarily follows that this pm ll will serve as a seal to prevent the l quid entering the pump from opening 40 from'lealring into opening 43. That is to say, the pin 28 serves as a par tition or barrier between the two openings 40 and 4-3. This means that the liquid entering the chamber from the inlet 35 must travel around with the ring 23 before it can be discharged into the opening 48 disposed in communication with the outlet 36.

Now, of course, it is to be understood that although I have illustrated and described in detail the preferred form of my invention, the invention is not to be thus limited, but only in so far as defined by the scope and spirit of the appended claims.

I claim as my invention:

1. In combination, in a rotary pump, a pump body including a cylinder having an annular opening comprising a pump chamber formed therein, an annular ring disposed in said chamber, an eccentric rotatable in said ring and adapted to impart an oscillatory motion to said ring, said ring having a slot formed in its periphery, and a pin fitted in said slot and rigidly connected to said cylinder, said ring being adapted to pivot on said pin during its movement by said eccentric.

2. In combination, in a rotary pump, a pump body including a cylinder having an annular opening comprising a pump chamber formed therein, an annular ring disposed in said chamber, an eccentric rotatable in said ring and adapted to impart an oscillatory motion to said ring, said ring having'a slot formed in its periphery, a pin fitted in said slot and rigidly connected to said cylinder, said ring being adapted to pivot on said pin during its movement by said eccentric, an inlet connected to said chamber on one side of said pin, and an outlet connected to said chamber on the other side of said pin, said pin serving as a sealing barrier between said lnlet'and outlet to prevent leakage of fluid from the inlet to the outlet.

3. In combination, in a rotary pump, a pump body including a cylinder having an annular opening comprising a pump chamber formed therein, an annular ring disposed in said chamber, an eccentric rotatable in said ring and adapted to impart an oscillatory motion to said ring, said ring having a slot formed in its periphery, and a cylindrical pin fitted in said slot and connected to said cylinder, said ring being adapted to pivot on said pin during its movement by said eccentric, said slotbeing slightly larger in width than the diameter of said pin, whereby said ring can move to and from said pin.

4:. In combination in a rotary pump, a pump body including a cylinder having an annular opening comprising a pump chamber formed therein, an annular ring dlsposed in said chamber, an eccentric rotatable in said ring and adapted to impart an oscillatory motion to said ring, said ring having a slot iormed in its periphery, and circular means fitted in said slot and connected to saidcylinder about which said ring is arranged to pivot during the movement of the ring by said eccentric without moving said means relative to said cylinder.

In testimony whereof I have hereunto subscribed my' name at Chicago, Cook County, Illinois.

oHiinLns L. RAYFIELD.

Images