US2300952A - Pump foot valve screen - Google Patents

Description

Nov. 3, 1 942. R. MAY 2,300,952

PUMP FooT VALVE SCREEN Filed April 20, 1959 www 11m@ IYNVENTOR ATTORNEYS Patented Nov. 3, 1942 UNITED STATES PATENT OFFICE PUMP FOOT VALVE SCREEN Richard T. May, Duthie, Idaho- Application April 20, 1939, iSerial No. 2693015 1 Claim.

This invention relates to pump foot valve screens and has for an object to provide a sscreen mounted in a pan to keep sand and small rocks from being drawn into the pump and causing undue wear and damage to the pump.

A further object is to provide a device of this character which will be formed of a few simple strong and durable parts, which will be inexpensive to manufacture, and which will not easily get out of order.

With the above and other objects in view the invention consists of y certain novel details of construction and combinations of parts hereinafter fully described and claimed, it being understood that various modications may be resorted to within the scope of the appended claim without departing from the spirit or sacricing any of the advantages of the invention.

In the accompanying drawing forming part of this specification:

Figure 1 is a' longitudinal sectional view of the device in applied position.

Figure 2 is a top plan view of the device.

Figure 3 is a longitudinal sectional view of a modified form of the device.

Referring now to the drawing in which like characters of reference designate similar parts in the various views, IG designates a cup fully open at the top and having inclined side walls. A cylindrical screen I I, smaller diametrically than the smallest corresponding dimension of the cup I0, is located centrally within the cup. The bottorri of the screen I I is closed by the imperforate bottom wall I2 of the cup I.

The screen is provided with an annular imperforate top wall I3, adapted to be secured to the lower end of a standard valve foot I4. The top wall I3 is secured to the foot I4 by bolts I5 passing through apertures I6 extending through the top wall I3 of the screen II. Radially disposed narrow strap braces I'I are secured to the upper edge of the side wall of the cup I!! and to the top wall I3 of the screen. A flap valve I8 is disposed in the foot I4 and attached to the foot by threads is a suction pipe I9.

In the modified form of the invention shown in Figure 3, 2B designates a cup fully open at the top and having vertical side walls. A cylindrical cup 20. An annular imperforate top wall 23 forms a top for the screen, and extends outside of the screen to form a securing flange adapted to be secured to a base flange on the lower end of screen 2 I, smaller diametrically than the smallest corresponding dimension of the cup, is disposed in the cup. The lower side of the screen 2I is closed by the imperforate bottom wall 22 of the the standard foot or pipe I4 by bolts or rivets passed through a base ange on the pipe and apertures 24 in said securing flange, of the screen. Radially disposed narrow strap braces 25 are secured to the upper edge of the side wall of the cup 20, and to the top wall 23 of the screen.

When the pump is in operation water is drawn downwardly into the cup as indicated by the arrows in Figure l, and through the cylindrical screen in the center of the cup. It is then drawn upwardly past the flap valve I8 in the suction pipe I9. As the water passes into the cup and through the said screen, small rocks and debris lodge against the screen and are prevented from being drawn into the pump to cause undue wear and damage to the pump. The inclined side wall of the cup permits the foreign matter being easily dumped when the cup is full. This easy dumping is accelerated by the long arcuate spaces between the radially disposed strap braces I1.

From the above description it is thought that the construction and operation of the invention will be fully understood without further explanation.

What is claimed is:

A strainer comprising a cup fully open at the top and having an imperforate side wall and an imperiorate bottom wall, a cylindrical screen of substantially the same height as the cup and smaller diametrically than the smallest corresponding dimension of the cup disposed centrally within and coaxial with the cup, the imperforate bottom wall of the cup closing the bottom oi the screen, an annular imperforate top wall for the screen extending laterally outside of the screen to form a securing flange, a pipe disposed coaxial with the screen and with the cup having a base ange bolted to said securing flange, and radially disposed narrow strap braces secured to the upper edge of the side wall of the cup and to the periphery of the said annular top wall of the screen providing long arcuate spaces between the braces to promote unobstructed access of the liquid and gravel into the cup and to promote easy dumping of trapped gravel from the cup.

RICHARD T. MAY,

Images