US872501A - Self-measuring oil-pump. - Google Patents

Description

J. B. DAVIS. SELF MEASURING OIL PUMP.

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BAT'ENTED 112d. 3, 1907.

No. 872,501: PATENTED DEC. 3, 1907.

J. B. DAVIS.

I SELF MEASURING OIL PUMP.

APPLICATION FILED JUNE 8 1906 2 SHEETS-$113111 2.

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JOHN B. DAVIS, OF DAYTON, OHIO.

OFFICE.

SE LIP-MEASURING- OIL-PUMP.

Specification of Letters Patent. Application filed June 8, 1906. Serial No. 320.787.

Patented Dec. 3, 1907.

To all whom it may concern:

Be it known that I, J OHN B. DAVIS, a citizen of the United States, residing at Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Improvements in Self-Measuring Oil-Pumps; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make. and use the same, reference being had to the accompany-- ing drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

This invention relates to new and useful improvements in self-measuring oil pumps, and comprises a single cylinder and piston. The oil is discharged during both movements of the piston, in pints, quarts or gallon quantities, or any specific quantity.

The object of the invention is to provide a single cylinder pump for dispensing oil, the same having the structural features hereinafter described and claimed. Access to the valves may be had without disturbing any of the parts of the pump.

In the accompanying drawings,Figure 1, is a front elevation of the pump, the middle portion of the cylinder being broken away. Fig. 2, is a view at right angles to Fig. 1 with the middle portion broken away. Fig. 3, is a sectional view through the length of the cylinder on the lines w-ac of Fig. 2, and cc:x; of Fig. 4. Fig. 4, is a top plan view of the cylinder head, the upper frame being removed. Fig. 5, is a bottom plan view of the base of the pump. Fig. 6, is a cross sectional view of the cylinder head on the line y/y of Fig. 3. Fig. 7, is a sectional view on the line V-V of Fig. 8, and VV of Fig. 5. Fig. 8, is a sectional view of the cylinder base on the line WW of Fig. 3, and W W of Fig. 7.

In a detail description of the invention, similar reference characters indicate corresponding parts.

The ump cylinder 9 is secured between the cylinder head 19 and the cylinder base 1 by a suitable number of tie rods 29. The base 1 has projected from its lower side a pipe nozzle 3 which is screw-threaded to receive a supply pipe (not shown) which discharges into the main chamber 8 in said base.

On opposite sides of said base there are extensions 22, one of which provides a bychamber 8 which communicates with the chamber 8, and the other of which provides a chamber 7 which is separated from the chamber 8 by a division wall 6. In the wall above the by-chamber 8 there is a suction port 4 which will be again referred to. Above the chamber 8 and on one side of the by-chamber 8 there is an upper auxiliary chamber 14 inclosed by an integral wall 12, said chamber 14 communicating with the cylinder 9 below the piston 18. The bychamber 8 communicates with the pump cylinder 9 above the piston 18 through the suction port 4 and pipe 5- to be again referred to. The chamber 7 forms an outlet from the pum cylinderbelow the piston through an out et pipe 5 and ports 10 and 11. The suction pipe 5 and the outlet pipe 5 are secured between the head 19 and the base 1 and located at the upper ends'of said pipes 5-5 a are valves 28-28. These valves 28-28 are located in by-chambers 21 formed by extensions 20 on opposite sides of the head 19; one of said chambers communicating with the main chamber 22 in said head and the other of said by-chambers communicating with a chamber 23 which is separated from the main chamber 22 by a partition wall 24, the converging ends of which provide a centrally-disposed hub 25 through which the piston rod 26 passes. Located in the main chamber 22 is an outlet charge pipe 34 through the chamber 22 to be again referredto. The suction valve 28 supplies the chamber 23, and said chamber 23 ,communicates with the upper end of the pump cylinder 9 through a port 30. The main chamber 22 is supplied through the valve 28 at the upper end of the pipe 5. The various valves are easy of access for removal and repairs without detaching any portion of the pump, said valves being inclosed by screw caps or covers 35 which fit into openings in the base 1 and the head 19 respectively.

The piston rod passes through a stuffing box 27 above the cylinder head and has connected to its upper end a vertical rack 36, the lower end of which has a laterally projected head 37; this rack is guided in a frame 38 39, the latter beingmounted on plate 19 above the cylinder head 19. The rack 36 is driven from a pinion 40 having its journals valve 33 which communicates with the diswhich is supported at the top of standards 2 mounted in the frame 38, and the said pinion is driven from a crank 41 having a suitable handle.

One side of the standards or uprights 39 is provided with indications denoting the different quantities of oil measured from the pump according to the throw of the piston through the rack 36. In the present instance these indications denote quarts and gallons, but it will be understood that the indications may be arranged to denote pints, quarts and gallons in excess of one gallon. Adjacent to each of such indications there is an aperture 42 extending through the standard and adapted to receive a pin 43 which forms a stop limiting the upward movement of the piston by engaging the stop 37 on the lower end of the rack. As the indications are now shown upon the standards, this pin 43 is in a position to limit the movementof the piston to the discharge of two quarts of oil, and it will be clearly seen that the pin may be placed in any of the apertures and thus the movement of the piston be regulated to discharge any of the measures of oil indicated. The discharge pipe 34 which as before indicated communicates with the outlet chamber 22 in the head, through the valve 33 and 28-, and the upper end of this pipe has a discharge nozzle-34 with a hook 44 thereon to support the vessel into which the oil is discharged.

The operation of the pump is briefly described as follows: Assuming that the piston as it appears in Fi 3 is descending, the oil previouslyadmitteiI to the cylinder 9 below the piston under suction created by the previous up-movement of said piston, and through the valve 15, auxiliary chamber 14, and port 17 is forced under pressure into chamber 7 through port 10, and into the outlet pipe 5 through port 11 and into the chamber 22 in the head 19 through valve 28. The same pressure opens the discharge valves 28 and 33, and forces the oil through the discharge pipe 34. During this movement of the piston the suction valve 15 is closed and the piston creates a vacuum or partial vacuum above it within the cylinder which is immediately filled with oil which is supplied thereto under suction through the port 4, valve 28 and the port 30, which as before stated, forms a communication between the chamber 23 in the head and the upper end of the cylinder above the piston. Upon the reverse or upward movement of the piston, the oil so admitted above the piston is dis charged to the chamber 22 through the valve 33 under pressure, and from the chamber 22 to the pipe 34.

An important feature of the improvements, and which alone enable a single cylinder pump to discharge continuously inaccurate measures, during its operation, is referred to. It will be seen that at all times the piston rod displaces a certain proportion of the oil above the piston, said portion of oil so displaced being equal to the length of the submerged portion of said rod multiplied by its cross sectional area. Assuming for example, that it is desired to discharge from the pump a half gallon measure, the piston in its upward movement would discharge a fraction less than half of that amount, or a fraction less than one quart owing to the displacement of oil by the piston rod; in the downward movement of said piston, it will discharge a fraction more than half that quantity or a fraction more than a quart, owing to there being no displacement of oil below the piston, and thus the amount of oil displaced above the piston is compensated for.

I claim:

In a pump of the type specified, a cylinder, a piston therein, a base joining the cylinder and having a main inlet chamber fed through an axial opening, and an auxiliary inlet chamber above the main inlet chamber, the inlet to the auxiliary chamber from the main chamber being controlled by a valve which is located out of the plane of the cylinder, the said auxiliary inlet chamber communicating with the cylinder below the piston, an exterior cover inserted in the base above the valve which controls the communication between the main and auxiliary inlet chambers. and by means of which access is had to said valve, the said base having a third chamber communicating with the cylinder through a valveless port and forming the outlet from the cylinder below the piston, a cylinder head having a main outlet chamber which communicates with both ends of the cylinder, a valve-controlled pipe parallel with the cylinder and through which is established a communication between the third chamber ,in the base and the outlet chamber in the head, said cylinder head having an inlet chamber to the upper end of the cylinder, and a valve-controlled pipe establishing a communication between thelower end of the cylinder and the inlet'chamber in the head, all arranged substantially as specified.

In testimony whereof I affix my signature, in presence of two witnesses.

' JOHN B. DAVIS.

Witnesses R. J. MoCARTY,

C. M. THEOBALD

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