US962518A - Pump. - Google Patents

Description

J. E. NAUGHTIN. PUMP.

APPLIGATION FILED AUG. 21, 1909. 962,5 1 Patented June 28, 1910.

3 SHEETS-SHEET 1.

I if "1' K J. E. NAUGHTIN.

PUMP.

APPLICATION FILED AUG.21, 1909.

Patented June 28, 1910.

3 SHEETS-SHEET 2.

lINI STA PTT FFQ PUMP.

Application filed August 21, 1909.

Specification of Letters Patent.

Patented June 28, 1910.

Serial No. 513,934.

To all whom it may concern:

Be it known that I, JAMES E. NAUGHTIN, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Pumps, of which the following is a specification.

My invention relates to pumps, and is particularly advantageous in connection with lubricating pumps for automobiles, locomotives and other power propelled vehicles.

The general object of the invention is to provide a simple and efficient valveless pump which will be reliable in operation in spite of the tossing and vibration due to the movement of the vehicle.

As contributing to the main or general object, it is my purpose to provide a mechanism in which the circulation is accomplished by means of a plunger which is both rotary and longitudinally reciprocable.

Another contributory object of the invention is to provide advantageous means for reciprocating and rotating the plunger, also to provide a keeper for yieldingly holding the parts in position after they are adjusted.

It is also my object to provide certain details of construction which will be hereinafter more particularly described and claimed.

I obtain my objects by the mechanism illustrated in the accompanying drawings, in which- Figure 1 is a side elevation of the assembled pump with the casing shown in section. The plane upon which the section is taken is indicated by the line 1-1, Fig. 2. Fig. 2 is a sectional elevation taken on the line 2-2, Fig. 1. V Fig. 3 is similar to Fig. 2, except that the plunger is shown at the top of the stroke instead of at the bottom thereof, as in Fig. 2. Fig. 4 is a plan section taken on the irregular line M, Fig. 1. Fig. 5 is a sectional elevation taken on the line 55, Fig. 4. Fig. 6 is a fragmentary sectional elevation showing the preferred means for causing the rotation of the plunger. Fig. 7 is a plan section taken on the line 77, Fig. 6. Fig. 8 is a fragmentary sectional elevation showing the yieldable keeper which prevents rotation of the stem of the driving sleeve. Fig. 9 is a fragmentary sectional elevation showing a modification of the means for rotating the plunger.

Fig. 10 is a plan section taken on the line 10-10 Fig. 9. Fig. 11 is a detail sectional view in elevation showing a modification of the cylinder and plunger.

Similar numerals refer to similar parts throughout the several views.

In the form of pump selected to illustrate the invention the working parts are mounted within a pump casing 1 which is adapted to contain the liquid to be pumped. For convenience the liquid will be referred to hereinafter as oil although it will be understood that any liquid or semi liquid sub stance may be operated upon. The casing may be fastened to the vehicle or other support by means of bolts 2 or other suitable devices. The working parts are driven by means of a shaft 3 journaled in the pump casing and geared to the crank shaft 4 by means of a worm 5 and gear 6 or any other suitable transmission mechanism. Connecting rods 7 connect the cranks 4 of shaft 4 to a driving bar 8, which in the present instance, reciprocates vertically and causes a vertical movement to the pumping mechan- 1sm proper.

Rigidly secured to the horizontal frame member 10 at the bottom of the pump casing is a pump cylinder 11 having an outlet or discharge port 12 at the side, as best shown in Figs. 2 and 3. For structural purposes and to admit of drainage and cleaning, the lower end of the cylinder is provided with a screw plug 13. The upper end of the cylinder opens into the casing above the cross member 10 and hence the oil tends to flow into it by gravity. The opening may be through the end of the cylinder or there may be an opening 11 in the side as shown in Fig. 11. The port 12 communicates with a chamber 14 whence the oil is led away by the distributing pipe 15. The plunger 17 fits into the cylinder 11 and is longitudinally bored to form a chamber 18 having at its upper end a port 19, which in the preferred form, consists of an elongated slot arranged vertically in the manner illustrated. This construction may be varied, however, and two ports 45 and 46 may be substituted for the single port 19, as shown in Fig. 11. At

its upper end the plunger 17 fits slidingly is nonrotatable but is vertically reciprocable. .A coiled compression spring 22 is interposed between the top of the plunger 17 and upper end of the driving sleeve 20. An anti-friction disk 23 is desirable between the upper end of the plunger and lower end of the spring. The upper end of the driving sleeve is connected to the driving bar 8 by means of a stem 25 which screws into an adjusting nut 26, screwing onto the upper end of said sleeve. The preferred manner of fastening the stem 25 to the driving bar is illustrated in detail in Fig. 8, where it will be seen that a hexagonal or other polygonal collar 28 is formed integral with said stem above said driving bar and a lock nut 29 on said stem screws against the lower edge of said bar. In the present construction the throw or vertical travel of the bar 8 is constant and the vertical position of the driving rod is adjustable through the medium of the nut 26. To make such adjustment re quires the rotation of the stem 25. To facilitate such rotation the upper end of the stem 25 has a notch 31 for receiving a screw driver or other tool. In order to admit of such rotation for adjustment and yet pre-- vent accidental rotation I have provided special means which consist of a keeper 32 fastened to guide rods 33 which are vertically slidable in the driving bar 8. Said guide rods are urged downward toward said driving bar by springs 34 which encircle said rods and are interposed between the lower edge of the bar and collars 35 fastened to said rods near the lower end thereof. The present design shows a triple pump and said keeper acts upon all three of the collars 28. Said keeper is formed in such manner as to engage the edges of the collars 28 and prevent them from accidental rotation. The ordinary jar due to the vibration of the vehicle will be insufficient to overcome the retaining action of said keeper and yet, as

said keeper is yieldable, it permits the rotation of the stems 25 when the user wishes to change the vertical adjustment of the sleeves 20. The stems 25, by preference, extend upward from the casing and thus act as guide stems to insure the proper alinement of the reciprocating parts. Stufling boxes 36 are provided to prevent leakage.

I have now described the means for causing the vertical reciprocation of the plunger but in my pump said plunger has in addition to its vertical movement a rotary movement centered to its own longitudinal axis which brings the port 19 into and out of communication with the discharge port 12. I will first describe the preferred means for producing such rotation of the plunger and will then return to the modification of said means, shown in Figs. 9 and 10. In the preferred form, shown-in detail in Figs. 6 and 7, the plunger 17 has helical grooves 38 into which project balls 39 which are contained in apertures 40 formed in the side of the driving sleeve 20 and are held captive by the guide member 21. Obviously relative movement between the parts 17 and 20 in a vertical direction will cause rotation of part 17. This rotation of the plunger may also be produced in the manner shown in Figs. 9 and 10 in which a pin 12 is placed horizontally in the plunger 17 and extends into helical slots 4-3 in the driving sleeve 20.

In operation, commencingwith the parts at the top of the stroke, as shown in Fig. 3, the port 19 will be above the upper end of the cylinder 11, thus permitting the oil to flow down and fill the cylinder and the chamber 18 in the plunger. The spring'22 will be extended and the position of the piston will be such that the port 19 will be angularly remote from the port 12. As the bar 8 descends under the action of the power mechanism the plunger will be forced downward until the port 19 is closed by entering the cylinder 11. As oil and other liquids are incompressible further descent of the plunger will be prevented until the plunger is rotated sufiiciently to bring the port 19 into communication with the discharge port 12. This rotation is effected by action of the balls 39 in the helical slots 38 or by the action of the pin 4C2 in the helical slots 43- hereinabove described. After the port 19 has come into communication with the port 12 the plunger is able to descend furtherand thus forces oil out through the port 12 and pipe 15. It is not necessary that the oil. enter and leave the chamber 18 through the same port for two separate ports may be substituted, as shown in Fig. 11. The pump will operate substantially in the same man ner as long as the upper port 45 is closed before the lower port 16 opens into discharge, port 12. The back pressure of the oil in the delivery duct 15 will keep the spring 22 compressed until the sleeve 20 has reached its lowest limit, but as soon as said sleeve commences to rise the spring will commence to extend with the result that the port 19 will be rotated away from port 12," thus cutting off said port 12 and preventing oil from flowing back into the cylinder. Then the apertures 10 have brought the balls 39 to the upper ends of the grooves 38 the rising sleeve 20 draws the plunger upward in spite of the vacuum thereby formed beneath the plunger; As soon as the upper end of the port 19 (or in the case of the modification shown in Fig. 11 the upper port 45) emerges from the top of the cylinder or communicates with the port 11 (Fig. 11) oil will flow down into the cylinder under the pressure due to the vacuum and also under the force of gravity.

It will be noted that as a result of my construction not only is the pump Valveless but the action is both positive and rapid, even though heavy semi-fluid oils be operated upon, for the suction in the cylinder operates with considerable force and insures the filling of the cylinder 11 and chamber 18 before the plunger has again descended far enough to cut off admission.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is:

1. In a pump, the combination with a cylinder having a discharge opening in its side, of two interfitting and relatively slidable members one of which fits slidingly in said cylinder and has a chamber therein opening into the cylinder and a port opening into said chamber from the side, one of said interfitting members being rotatable and the other being non rotatable, and a cam device operated by one of said interfitting members and operating upon the other of said inter-fitting members for the purposes described.

2. In a pump, the combination of a cylinder having an inlet opening and a discharge port, a plunger rotatable and longitudinally movable in the cylinder, said plunger having a chamber opening into the cylinder and a port in its side communicating with said chamber, and operating means for reciprocating and rotating said plunger, said operating means comprising a non rotatable sleeve wherein said plunger is rotatable and longitudinally slidable, and cam mechanism operated by said sleeve and op erating upon said plunger for rotating the plunger when there is relative sliding movement between said sleeve and plunger.

3. In a pump, the combination of a cylinder having an inlet opening and a discharge port, a plunger rotatable and longitudinally movable in the cylinder, said plunger having a chamber opening into the cylinder and a port in its side communicating with said chamber, and operating means for reciprocating and rotating said plunger, said operating means comprising a non rotatable sleeve wherein said plunger is rotatable and longitudinally slidable, cam mechanism operated by said sleeve and operating upon said plunger, and a yielding connection between said sleeve and plunger.

4. In a pump, the combination of a cylinder having an inlet opening and a discharge port, a plunger rotatable and longitudinally movable in the cylinder, said plunger having a chamber opening into the cylinder and a port in its side communicating with said chamber, and operating means for reciprocating and rotating said plunger, said operating means comprising a non rotatable sleeve wherein said plunger is rotatable and longitudinally slidable, said plunger having a helical cam groove, means eXtendin from said sleeve into said cam groove tor rotating said plunger, and a spring acted upon by said sleeve and acting upon said plunger for causing sliding movement of said plunger relatively to said sleeve.

5. In a pump, the combination with the casing and power mechanism of a sleeve reciprocated by said power mechanism, a guide for said sleeve adapted to prevent rotation thereof, a plunger which is rotatable and longitudinally slidable in said sleeve, a spring engaging both the sleeve and the plunger for causing the plunger to slide relatively to the sleeve, and cam mechanism part of which is upon the sleeve and part upon the plunger for causing the plunger to rotate when there is relative sliding movement between the sleeve and plunger, said cylinder having a port in the side thereof and said plunger having a chamber opening into the cylinder and having a port in the side communicating with said chamber and adapted to be brought into and out of register with the discharge port of the cylinder.

6. In a pump, the combination with the cylinder and plunger of a non rotatable, reciprocating sleeve for operating said plunger, a rotatable stem screw-connected to said sleeve for reciprocating and adjusting it, a polygonal collar upon said stem and a spring urged non rotatable keeper engaging said collar.

7. In a pump, the combination with the cylinder and plunger of a non rotatable, re ciprocating sleeve for operating said plunger, a rotatable stem screw-connected to said sleeve for reciprocating and adjusting it, a driving member for reciprocating said stem, a non circular projection on said stem, a keeper adapted to engage said projection, and a spring carried by said driving member and urging said keeper into engagement with said pro ection.

8. In a pump, in combination a plurality of cylinders, plungers working therein, non rotatable reciprocating sleeves for operating said plungers, rotatable stems for recipro cating said sleeves, said stems being screw connected to said sleeves whereby the position of said sleeves may be adjusted by rotating said stems, and a yielding non rotatable keeper engaging all of said stems for preventing accidental rotation thereof.

9. In combination, a pump casing, a cylinder arranged vertically at the bottom thereof, and having a port in the side thereof, a chambered plunger in said cylinder having a port in the side and communicating with the lower end of the cylinder, a non rotatable reciprocating sleeve wherein said plunger is both rotatable and longitudinally slidable, a spring interposed between said sleeve and said plunger for causing relative sliding movement, helical cam connections between said sleeve and plunger,

a guide for" said sleeve power mechanism and connections between said power mechanism and said sleeve.

10. In combination, a cylinder having a discharge port in' the side thereof, a piston having a chamber 18 therein opening into the cylinder, and an opening in the slde of said chamber, said plunger having a helical cam groove therein, a non rotatable recip rooating sleeve wherein said plunger is both slidable and rotatable, means extending from the sleeve into said cam groove for rotating the plunger, and a spring acting upon the sleeve and plunger to cause one to slide relatively to the other.

In witness whereof, I have hereunto subscribed my name in the presence of two witnesses.

JAMES E. NAUGHTIN. Witnesses:

L. G. STROH, HOWARD M.- Cox.

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