US1154348A - Pump-head. - Google Patents

Description

H. F. STORY.

PUMP HEAD.

APPLICATION FILED JULY 16. I913.

1, 1 54,348. Patented Sept. 21, 1915.

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COLUMBIA PLANOURAPN IO-,WASHINOTON. n. c.

H. F. STORY.

PUMP HEAD.

APPLICATION FILED JULY 16. I913.

1,154,348. PatentedSept. 21, 1915. v

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ameters of the camsand-that to get -a longer' UNITED v sra'rns PA omen.

HUDSON F; STORY, OF'I-I'IGI-ILAND', CALIFORNIA; AssIeNoRor ONE-HALF To JOHN D.

BOLEY, OF HIGHLAND, CALIFORNIA.

PUMEI-IEAD.

Specification of Letters Patent.

Patented Sept. 21, 1915."

Application filed July 16, 1913. Serial No. 779,395. r 7

To all whom it may concern p I 4 Be it 'known'that I, HUnsoN F. STORY, a citizen of the United States, residing at Highland, in the county of San Bernardine and State of California, have invented taken up by the other piston smoothly and;

without jar while the column of fluid is moving upward, and w thout any pulsation and variation in force of the stream that issues from the pump.

In contradistinction to said former invention,an-object is to flow. I t

Another-object is to effect the-foregoing results by a simpler device than that shown in said previous patent. a

Insaid former invention I provide two cams of similar construction arranged re versely ona common shaft, the working faces of the cams beingarranged horizontally so as to act directly on the sucker rod frames to reciprocate them; By this construction the length of the strokes, of the sucker rods depehdedyupon the thrust of the cams and it is evident that such stroke would begoverned' more or less by the distroke a larger cam would'be necessary.

Generally stated, this invention differs from said former invention in the provision of a single cam-arrangedto act upon diametrically opposite cross headsworking at right angles to the sucker rods andconnected to the sucker rods by bell-cranklevers.'- By this constructionand arrangement Iain enabled to obtain a largernurnber; of strokes per minute and a greater-length of piston stroke without materially increasing the diameter of the cam over the diameter of" the cam in said former patent.

Insaidformer patent the superior cusps effect a more copious of the cams were diametrically opposite one;

another andbisected by a common axial plane, and the inferior cusps were also diametrically opposite one another and loisected'by said common plane, whereas in this present invention the superior and inf ferior cusps are not diametrically opposite one another but are offsetand bisected by different a-Xial planes of the camsf During one complete cycle, in which the cam turns once, the lower against the weight of the upwardly moving column of fluid while the upper pistonis making a slower movement at the end of its upstroke. Then the lower piston con reverses and gradually increases in speed until it'reaches approximately the middle of its down stroke and from there decreases piston will be lifted quickly tinues on its upstroke at substantially the same rate. of speed and the upper piston;

in speed to the endof 'its down' stroke, at

which time thelower piston. has still some movement to make at the end of its up stroke. Then the upper piston reverses and makes its lifting stroke the same as just described for the lowe-rpistonl The novel constructionof the cam and other parts effects other advantages i will appear from inspection of the drawings and subjoined detail description. The accompanying drawings illustrate the invention. v Figure 1 is a perspective view of a pumphead built in accordance with this invention.- The upper sucker rod cross-head is shown at the end of its upstroke and the lowersucker rod cross-head before reaching the end of its downstroke Fig. 2 'is aplan view of Fig.1 with theaddition of adriving pulley, the cam being-turned through 180 and \the other operating parts being shown to correspond. Fig. 3 is an elevation mainly in section on line indicated by a Fig. 2. Fig. 4 is a vertical cross section on line indicated by 00, Fig. 3. Fig.5 is an enlarged sectional detail on line cated by 00 Fig. 2. Fig. 6 an enlarged sectional plan detail on line indicated by a, Fig. 3. Fig. 7 is an enlarged sectional: plan detail on line indicated by 00 Fig. 3. Fig. 8 is an analytical, diagrammatic view of the cam andsucker rods. p p I An'inner sucker rod 1 and an outer tubular sucker rod '2 surrounding the inner sucker rod are provided for attachment to Cir stufling box forming a slide 3 through which the inner sucker rod 1 extends and to which is pivoted a pairof connecting links 4 that are pivoted at 5 to a lower bell-crank lever 6 journaled at 7 to a suitable support as a frame 8; and the inner sucker rod is fixed to an upper slide 9 to which is pivoted a pair of connecting links 10 that are pivoted at 11 to an upper bell-crank lever 12 journaled at 13 to the frame 8, The bell-crank levers 6, 12 are superposed and work in a common plane.

The-sucker-rod slides 3 and 9'are superposed and reciprocatably engage a pair of verticalslide rods. 14 which are supported below by any suitable means, not shown, andwhich are supported above by a bracket 15 carried by thefraine ,8.

The lower bell-crank lever 6 is pivoted at 16 to 'a lower connecting rod 17 which is pivotedl at' 18 to a front, lower, horizontally working cross-head vl9 thatis provided at its centerwith a beveled roller-2Q and that is adjustably connected by shouldered bolts 21 to a rear fc'ross head 22 provided at its center with a beveled roller 23; and the upper bell-crank lever 12 is pivoted at 24 to an upper connecting rod25 which is pivoted at 26 to an upper, front, horizontally working cross-head27 thatis provided at its center with a beveled roller- 28 and thatis adjustably connected by shouldered bolts 29 to an upper 're'ar cross-headjgOprovided at its centerfwith a beveled roller-31.

The shouldered bolts 21, 29 are provided with washers32 'andafford means to adjust the cross-head's 19, 22and 28, 30, respec tively, toward one another to compensate for wear.

"The ends" of the lower cross-heads 19, 22

, reciprocatably engage apair of lower, slotted, horizontal,complementary guides 33,

V 34 of'the frame fl and the ends of the upper cross-heads 2'1 reciprocatably engage apair of upper, slotted, horizontal, compleinentaryguldes 35,36 of the frame 8, the

guide" 35in this instance being detachably fastenedby boltsB'i ortlie like, I

The' pair of spaced apart rollers 20, 23 are diametrically{opposite one another and the pairof spaced apart rollers 28, 31 are diametrically opposite one another: and all are in the working plane of the bell-crank levers 6, 12 and I the rollers ofseach pair reg ceive llbetwe'en theirlbeveled faces the revers el y beveled front and rear faces of a cam 38 wlii'c'h'is fa'stened byfa key 39 and set screws 40 to a longitudinallyextending shaft 41 that is iiournaled in front and rear boxes 42, 43 of thefiameS 1 From the foregoing "construction it is .the sucker rods 14 is in said vertical axial plane, and that such construction effects great strength and simplicity of the working parts and provides for the application of power so as to get the full benefit of said power without liability of straining and breaking said parts.

The cam shaft 41 may be driven by any suitable means and in this instance I have shown a pulley 44 for this purpose as there is little, if any, variation-in the load and the operation is so smooth that a belt and pulley may be used where other devices of this kind employ gear wheels which of course are more expensive.

Particular attention is called to the unique construction of the cam 38 which is provided with superior and inferior cusps 45, 4G that engage the rollers of the lower and upper cross-heads 19, 22 and 27, 30 respec-- tively at different periods of time, said cusps being bisected by different axial planes of the'cam. i

The'cam 38 is provided between the superiorand inferior cusps 45, 46 for 180 of its diameter with an upstroke, constant speed, load-lifting limb 47 and for less than lSOTof its diameter with a rdownstroke returning limb extending from the superior cusp substantially halfway to the inferior cusp in an accelerating limb'48 and-extending from thence to the inferior 'cuspin a:

slowing limb 49; and the cam is provided at the inferior cusp adjacent the slowing limb with a rest face 50'; and the camis provided i with an upstroke valve-closing limb 51 extending from the rest face to the lifting limb 47;. It is thus seen that 'the entire downstroke limb, rest face and-upstroke valve-closing limb 48, 49-, 50', 51 take up 180 of the cam diameter. 4

' The-rim ofthe cam for the greaterpart of its circumference is much narrower than the space between the rollers 20, 23 and rollers 20, 31 respectively so that the front ro1lers 20, 28 ordinarily act as idlers only but the rim is thickened at the superior cusp to substantially the widths'of said space to form a reversing face 52 and the rim is also thickened to the same extent at-the inferior'cusp 46 to form a node 53 which preventsany upward movement of the crossheads while the rest face engagesthe rear roller 23or 31 as the case may be. i i

From the foregoing it: is clear that :in

practical operation as clearly shown in Fig: 9, considering the lower suckerrod Slld8i3' 1n the bottomposition a of'itsdownstroke with-the cam 3S turned to bring the rollers 20, 28 in the position designated a when the cam is turned in' the direction. of the feathered arrows thereon, the lower roller 23 will traverse the upstroke valve-closing limb 51 from a to a to lift the lower slide 3 from a to a while the upper roller 31 traverses the upstroke lifting limb 47 from b to b to lift the upper slide 9 from b to 6 and the lower and upper rollers and lower and upper slides will continue in operation through successive positions designated a a and Z2 b to a and b, by the end of which movements the cam will have made one complete revolution and both the lower and upper slides will have been operated on an upstroke and a down stroke.

l. The combination with two sucker rods, of a shaft provided with a cam having a superior cusp and an inferior cusp and having a load-lifting limb between the superior and inferior cusps for 180 of its diameter, said cam being provided with a returning limb extending from the superior cusp substantially half way to the inferior cusp in an accelerating limb and extending from thence to the inferior cusp in a slowing limb, said cam being provided at the inferior cusp adjacent the slowing limb with a rest face, and said cam being provided with an up stroke valve-closing limb extending from the Copies of this patent may be obtained for five cents each, by addressing the superior cusp and an inferior cusp and having a load-lifting limb between the superior and inferior cusps for 180 of its diameter, said cam being provided with a returning limb extending from the superior cusp substantially half way to the inferior cusp in an accelerating limb and extending from thence to the inferior cusp in a slowing limb, said cam being provided at the inferior cusp adj acent the slowing limb with a rest face and with an upstroke valve-closing limb extending from the rest face to the lifting limb, and said cam being thickened at the superior cusp to form a reversing face and thickened at the inferior cusp to form a node; and means operatably connecting the cam to said sucker rods.

In testimony whereof, I have hereunto set my hand at Los Angeles, California this 10th day of July, 1913.

HUDSON F. STORY.

In presence of JAMES R. TOWNSEND, GEORGE H. HILES. a

Commissioner of Patentsl Washington, D. C.

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