US954313A - Inlet-valve and water-screen for pumps. - Google Patents

Description

0. H. LILLYMAN.

INLET VALVE AND WATER SCREEN FOR PUMPS.

APPLICATION FILED APR. 19, 1909.

954;, 3 1 3. Patented Apr. 5, 1910.

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INVENI'OR WITNESSES 0Z01 .E Za'ZZymm ATTORNEYS /JM W150 ANuRSW a. GRAHAM c0 WOTO-UTNOORAPHERS. wAsmNqvcn, M;

UN 11E OLOF HENRICK LILLYMAN,

OF POTLATCI-I, IDAHO.

INLET-VALVE AND WATER-SCREEN FOR PUMPS.

Specification of Letters Patent.

Patented Apr. 5, 1910.

Application filed April 19, 1909. Serial No. 490,660.

To all whom it may concern:

Be it known that I, OLOF HnNnLoK LILLY- MAN, a citizen of the United States, and a resident of Potlatch, in the county of Latah and State of Idaho, have invented a new and Improved Inlet-Valve and ater-Screen for Pumps, of which the following is a full, clear, and exact description.

The invention relates to check valves or strainer inlets. for water pumps in boats, and for other purposes, and the object of my invention is to provide novel details of construction for a foot valve for pumps and for a strainer attachment therefor, that enables the instant cleansing of dirt from the inlet strainer while the valve is in service, and permits the convenient detachment of the foot valve from its casing when repair of the valve requires it.

The invention consists in the novel construction and combination of parts, as is hereinafter described and defined in the claims.

Reference is to be had to the accompanying drawings forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a side elevation of the improved foot valve, and of the novel cleaning attachment mounted thereon; Fig. 2 is a sectional side elevation of the same; Fig. 3 is a side view of the novel cleaning device, the stem thereof being broken away; Fig. 1 is an edge view of the cleaning device seen in direction of the arrow :12 in Fig. 3; and Fig. 5 is a reversed plan view of the cleaning device in engagement with a strainer forming the bottom wall of the improved foot valve.

In the drawing that illustrates the construction of a novel bottom check or foot valve for an ordinary suction pump, not shown, 10 indicates the upper portion of a foot valve body, in which a chamber 10 is formed, that is laterally extended through a branch 10 which projects at one side of said body. At a suitable point below the branch 10", there is a diametrically enlarged valve cage 11, integrally formed on the lower portion of the body 10, said circularly-walled valve cage having its exterior surface threaded, as shown at a in Fig. 2. On the cage 11 an interiorly-threaded annular extension shell 12 is adjustably screwed, the thread in the shell terminating at an annular shoulder Z), that is produced by a reduction of the diameter of the bore in said shell below the thread therein. In the extension shell 1.2 a circularly-edged valve seat plate 13 is neatly fitted, which is seated upon the shoulder Z), said valve seat plate having parallel sides and a plurality of perforations c therein, which are located between a central hub (Z that depends from the valve seat plate, and a point properly spaced from the periphery of the valve seat. Above the branch 10 the body 10 is diametrically reduced and is centrally and longitudinally perforated, the bore thus produced in the body receiving a cylindrical stem l l which has a sullicient length to permit it to extend down through the body and extension of the valve cage.

A disk valve 15 is provided for an engagement with the valve seat plate 13, said valve consisting of a plate-like circularly-cdged disk having a lat-bottomed recess in its normally lower side, that is defined in area by a circular marginal flange c. In the recessed disk is seated and secured a flat circularlyedged washer 0, formed of leather or rubher, and as shown in Fig. 2, the disk valve and the hub (Z on the valve seat are centrally perforated for the passage of the stem 14: thercthrough. The cylindrical body of the hub (Z is exteriorly threaded and on it is screwed a cupped gland d which forms a packing box in which a packing f is held, the compression of which produces necessary friction on the stem 1 1 to prevent it from rotating too freely. In the upper wall of the chamber above the disk valve 15, studs 9 are secured, that are spaced apart and project downward an equal distance, said studs which have contact with the disk valve, serving to limit the upward movement of the disk valve when lifted by the operation of a pump attached to the branch 10. In this construction of the strainer attachment, the bottom wall 12 of the extension shell 12 is coniform and foraminated, the numerous perforations h in said bottom wall being spaced apart so as to form a strainer, which in service prevents mud and floating impurities from clogging the pump of which the foot valve is an adjunct. The lower end of the stem 14 passes through a central perforation in the coniform bottom wall 12, and upon said end of the stem at scraper blade is formed or secured.

The scraper blade consists of two members lt that are oppositely and equally diverged from the axis of the stem 14:, the degree of divergence adapting their upper edges 2' to have scraping contact throughout their length, with the coniform surface of the bottom wall l2 on the extension shell 12. The

stem let extends above the upper end of the body 10 and on the latter a packing boX 10" is provided through which the stem passes, the upper end of said stem having rectangular form for an engagement therewith of a suitable implement which will enable the rotation of the stem and scraper blade.

It will be seen that when the strainer 12 is obstructed by mud or other foreign matter, such clogging obstructions to the free passage of water into the body of the foot valve, may be quickly removed by turning the stem 14 and scraper blade 14;, while the pump and strainer are in use. To cause the scraping edges of the scraper blade 1 F to have proper contact with the coniform wall 12, a coiled spring m is placed 011 the stem near its junction with the blade 14 and seats upon the inner side of the bottom wall 12, the spring at its upper end having enforced engagement with a washer n that is mounted upon the stem and is held in place by a cross key a, as shown in Fig. 2. In some cases the foot valve may be dispensed with and the strainer device alone be used, which change may be readily effected by removing the disk valve 15.

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

l. A strainer for pumps, comprising a hollow body having a lateral outlet and provided with a valve seat and a perforated bottom forming a screen, a stem extending through both ends of the body, a scraper on one end of the stem outside of the perforated bottom and in engagement therewith, and a disk valve slidably mounted on the stem within the said body.

2. A strainer for pumps, comprising a hollow body having a lateral outlet and provided with a valve seat and a conical perforated bottom forming a screen, a stem extending through the ends of the body, oppositely arranged and upwardly inclined scraper blades on one end of the stem, a spring on the stem for holding the scraper blades in engagement with the said bottom,

and a valve slidably mounted'on the stem within the casing.

3. A strainer for pumps, comprising a hollow body, an outlet branch on one side of the body, a coniform foraminated bottom wall on the body, a stem centrally rotatable in the body and in the bottom wall, one end of the stem projecting beyond the body, a scraper blade on the stem having opposite divergent members that engage the outer surface of the bottom wall, an expansible spring mounted on the stem and pressing on the foraminated bottom wall, a washer on the stem seated on the spring, a cross pin in the stem bearing on the washer, and means for rotating the stem.

4. An inlet valve comprising a hollow body, having a valve cage on its lower end, an extension shell screwed on the cage, an apertured valve seat clamped between the cage and shell, a coniform foraminated bottom wall on the shell, a stem centrally rotatable in the shell and body, a scraper blade shaped to engage the outer surface of the foraminated bottom wall, a disk valve slidable on the stem and seating on the apertured valve seat, a spring on the stem adapted to draw the scraper blade toward the forai'ninated bottom wall and means for rotating the stem.

5. A11 inlet valve comprising a hollow body having a lateral outlet and provided with a valve seat below the outlet and a conical perforated bottom forming a screen, a stem mounted to turn in the body with its ends projecting through the ends of the body, upwardly inclined scraper blades on the lower end of the stem outside of the bottom and engaging said bottom, a spring on the stem for holding the scraper blades in engagement with the perforated bottom, a disk valve slidably mounted on the stem within the casing, and projections on the upper wall of the chamber in which the valve works and serving to limit the upward movement of said valve.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

OLOF HENRICK LILLYMAN.

Witnesses G. E. ARKWITH, R. S. SMITH.

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