US1586307A - Pump - Google Patents

Description

May 25 1926. v

R. HILDEBRAND PUMP Filed August 16, 1924 4 fro/ways Patented May 25, 1926. 1

UNITED smiles PATENT QFFICEQ,

REINHARD HILDEBRAND, or 'wniasrnn onovns, MISSOURI, Assienon IO FULTON mogv wonxs COMPANY, or sit. LOUIS, ivirssoimnn CORPORATION or DELAWARE.

PUMP.

This invention relates to improvements in puinps,and the novel features may be used in a pump adapted to deliver fuel'to an internal combustion engine. To illustrate the invention, I have shown a fuelfeeding pump adapted to supply liquid fuel to an engine of the Diesel type, but it parts hereinafter more specifically described and illustrated in the accompanying draw= ings, wherein is shown the preferred em--.

However, it is bodiment of the invention. to be understood that the invention comprehends changes, variations and modifications which come within thescope of the claims hereunto appended. j

The preferred form of the invention comprises a socket joint through which motion is transmitted in one direction from an oscillatory thrust member to a slidable memher, and a spring whereby the slidable mem-' her is returned, the spring being adapted to maintain the contactiug faces of the joint in firm engagement with each other. The slidable member herein shown is provided with a striking face adapted to strike an abutment through which motion is transmitted to the pump plunger, and anadditional spring is shown to return said plunger. As an illustration of a suitable lubricating system I have shown a groove formed in the periphery of said slidable member and'passageways leading from said groove to said striking face and also to the contacting faces of the socket joint. The slidable member is mounted in a guide provided with. an oil passageway leading,

to said groove. The socket joint is lubri- :ated to avoid undue friction and the str king face is supplied with oilto provide a' cushion which reduces the noise at this point.

Fig.

Iis a vertical section illustrating Application filed August 16, 1924. Serial No. 732,491.

a. portion of an engine provided with a pump embodying the featuresof this invention. N

Fig. II is'a horizontal section on the line ll--II in Fig. I.

The pump herein shown comprises a cylindrical pump chamber 1 confined between a guide 2 and a cover 3, the latter having a discharge port" 4- leading to a discharge pipe 0. p V T he pump plunger 6. is in the form of a tube provided with a longitudinal passage I for the'admissionof liquid fuel to the pump chamber '1 and having an inlet valve 8 at its upper end ,to prevent return flow of the liquid. 9 designates a spring tending to retain the inlet valve on its seat. A discharge valve 10 is located in the discharge passage 4t to prevent return of the liquid to'thepuinp chamber. The liquid to be pumped is supplied through a pipe 11 leading to an annular recess 12 formed around the. tubular plunger 6, the latterhavingports 13 communicating with said recess to admit the liquid to the inlet passage 7 in the plunger. i l f -To illustrate a suitable means for recipro-v eating the pump'plungei', I have shown an eccentric 17 on a rotary shaft 18, an oscil. latory thrust rod 19 with a forked lower end straddling and contacting with the Po riphery of s'ai d eccentric and having a curved upper end 20 seated in asoeket :21 formed in a crossl'iead 22, the latterv having a striking linger 23 adapted to engage an abutment member 24extending from a collar 2-4: at the lower end of the plunger A spring 25 is interposed between the abutment collar 24 and ashoulder 26 to serve as means for restoring the plunger. To restore the crosshead a spring '27 is interposed between a shoulder'2S on thecrosshead and a threadedtube 30 which serves as a stop to limit the downward motion of the plunger. The

V threaded tube is adjustable vertically to vary, the stroke of the plunger, thereby varyingthe quantity of liquid to be discharged from the pump. v The socket 21in the crosshead 22 has an arcuate face contacting with and conforming to the curved face at the upper end of thrust rod 19, and the restoring spring 27 retains these faces in contact with each other. This spring also retains the forked lower end of the rod 19 in contact with the eccentric 17, so it is not necessary to attach said rod 19 to the crosshead nor to the eccentric.

At the beginning of each upward stroke of the eccentric, the crosshead 22slides upwardly in a guide 31 and the striking finger 23 moves toward the abutment 24. During the middle portion of this stroke, the top face of finger 23 strikes said abutment to actuate the pump plunger and force the liquid through the discharge port 4 Thereafter, the crosshead 22 and thrust rod 19 are restored by the spring 27, while the spring moves the plunger downwardly until the collar 2i engages the adjustable tube 80.

During each upward stroke of the plunger, the inlet valve 8 is closed and liquid is drawn from the pipe 11 to the interior of the plunger, and during each downward stroke the discharge valve 10 is closed while the inlet valve 8 is open to admit the liquid to the pump chamber 1.

Lubricating oil is supplied to the periphery of the crosshead 22 and also to the arcuate faces of the socket joint, as well as to the top face of the striking linger 23 where it serves as a cushion or silencer. The crosshead is provided with a peripheral groove 32 and an internal passageway 33 having a branch 34; extending downwardly to the arcuate faces of the socket joint, and a branch 34 extending upwardly to the top face of the strik ingfinger 23. The oil is supplied through a passageway 35 formed in the guide 31 and having an enlarged discharge end 36 at the groove 32 in the periphery of the cross-- head. Oil is thus supplied to the outer face of the slidable crosshead which contacts with the guide, and at the same time a stream of the oil passes through the passageway 38 to lubricate the socket joint and the striking face at the top of finger A3. The upper end of the thrust member 19 is provided with three passageways as shown at 37 in Figs. I and II diverging from each other and leading to the contacting faces of the socket joint, so as to distribute the oil, said passageways being adapted to communicate with the passageway 34, as shown in Fig. I.

I claim:

1. A pump provided with operating means including a slidable member, a guide in which said slidable member is mounted, an oscillatory thrust member, said slidable member being provided with a socket having an'arcuate face, one end of said thrust member being provided with a convex face contacting with and conforming to said arcuate face, said slidable member having a groove in its peripheral face and an internal passageway leading from said groove to said contacting faces, said thrust member having diverging pasagcways leading to said contacting faces and adaptedto communicate with said internal passageway, and said guide being provided with alubricant passageway leading to said groove.

2. A pump provided with operating means including a driven member, a driving member adapted to strike said driven member to transmit motion thereto, said driving member being movable toward and away from said driven member, and means whereby lubricant is supplied to the striking face of said driving member.

3. A pump provided with a plunger having an abutment, a slidable member having striking face adapted to strike said abutment to actuate said plunger, and a guide in which said sl'dable member is mounted, said slidable member having a passageway leading from said guide to said striking face, and said guide being provided with a lubricant passageway leading to the first mentioned passageway.

A pump provided with a plunger hav ing an abutment, a spring adapted to move said plunger in one direction, a crosshead adapted to move said plunger in the opposite direction, a guide in which said crosshead is slidably mounted, said crosshead having an extended striking member movable toward and away from said abutment and provided with a striking face adapted to strike said abutment to acuate the plunger, said crossl-ead having an internal. passageway leading from said guide tosaid striking face, and said guide being provided with a lubricant passageway leading to said internal passageway.

5. A pump provided with a plunger having an abutment, a slidable member having a strikin face adauted to strike said abut-- ment to actuate said plunger, a guide in which said slidable member is mounted, and an oscillatory thrust member adapted to actuate said slidable member, said thrust member and slidable member having concentric faces contactingwith each other, said slidable member being provided with a peripheral groove and internal passageways leading from said groove to concentric facesand also to said striking face, and said guide being provided with a lubricant passageway leading to said groove.

In testimony that I claim the foregoing I hereunto aflix my signature.

REINHARD HILDEBRAND.

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