US1442787A - Rotary pump with priming chamber - Google Patents

Description

Jan; 16, 1923.

d. SCHEMINGER, JR. ROTARY PUMP WITH PRIMING CHAMBER,

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sates JOHN SCHEMINGEJR, 3B, OF PROVIDENCE, RHODE ISLAND.

ROTARY IPUMP WITH PRI'MING CHAMBER.

Application iuea August 27, me. Serial in). mean.

To all whom itmay cmwem:

Be it knownthat I, JOHN SGHEMIN ER, J12, a citizen of the United States, residing at Providence, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Rotar Pumps with Priming Chambers; and I do ereby declare the following to be a full, clear, and exact description of the invention, suchas will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to pumps, and more particularly to rotary pumps especially designed for use in feeding rotary oil burners, but capable of general application for various purposes.

liquid remaining in the pump chamber will gradually escape between the pistons and allow the chamber to be filled with air, and in order to start the pump, it becomes necessary to fill the pump chamber with l quid to a sufficient extent to expel the contained air and enable the pistons to produce the required suction for drawing the liquid from a source of supply into the pump chamber.

The object of my invention is to provide a pump with means to, retain suflicient oil or other liquid therein and above the pump chamber when the pump is idle to enable the user to start the pump'without priming as is usu'a'll necessary in pumps as heretofore ordinari y constructed, together with means to prevent the passageof impurities throu h the pump and into the burner or other evice with which the invention is used.

a The invention will first be hereinafter more particularly described, with reference to the accompanying drawings, whic h are to be taken as a part of this specification, and then pointed out in the claims at the end of the description.

In said drawings Fig. 1 is a side elevation of a rotary pump embodyin my invention Fig. 2 1s a vertical sectional elevation of the same; and

Fig. 3 is a transverse sectional view taken on the line 3-3 of Fig. l. I

Referring to saiddrawings, in which the se reference letters are used to denote corresponding parts in difierent views, the letter A denotes the pump casing in which and stands idle for a short time any are fitted the rotatable pistonsa and m the interior of the casing being recessed to receive and provide bearin for the ends of the shaft on which the piston a is mounted and one end of the driving shaft (i2, which carries the piston a The shaft a protrudes through a stufiing box of any suitable construction to prevent leakage, and may be driven in any suitable manner. On the pump casing is mounted a priming chamber B, which, in the form shown, is of globular construction and has secured thereon a removable cap I). Said priming chamber is constructed with a reduced lower end portion or neck, which is attached to the pump chamber by means of an exteriorly threaded sleeve having one end screwed. into said neck and the other end screwed into a socket in the pump casing directly over the inlet thereto, so as to provide a restricted passage for the liquid flowing out of the priming chamber into the pump chamber, and when the pump is stopped and allowed to remain idle fora sufiicient length of time to permit the liquid therein to escape, the pump chamber will be gradually replenished by the liquid contained in the priming chamber flowing through such restricted passage into the pump chamber by avity until its entire contents are emptied thus insuringi'a sufficient supply of water for starting the pump when allowed to remain idle for a considerable length of time, without the necessityfor priming. A strainer C is suspended'within the priming chamber by having a marginal portion of its upper end clam ed between said cap and the top of the priming chamber, as shown in Fig. 2, in order that the cap may be removed and the strainer taken out for cleansing or other purposes, or to permit the substitution of a new strainer which may be secured in place when the cap is replaced in the manner described. The cap I) has an opening therethrough in which is screwed the threaded end of an elbow D or {one terminal of a pipe leading from a tank or other source of supply, from which liquid may be drawn by thepump and forced into a burner or other device through the discharge pipe E at the base of the pum casing.

In operation, liquid WIll be drawn from the tank or other source of supply into the priming chamber B, through the strainer and thence through the pump and out of the pi e E, and whenthe pump is stopped and a1 owed to remain idle for a considerable time the liquid in the chamber B will afford a sufiicient supply for starting the pump without the necessity for priming.

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

1. A rotary pump with priming chamber for feeding oil burners, comprising a pump casing having a priming chamber of globular form mounted thereon, said priming chamber having a lower reduced outlet portion secured to the pump casing by means of a threaded sleeve having one end screwed into said lower outlet and its other end screwed into said pump casing so as to form a constricted passage leading from the priming chamber directly into the pump chamber, said priming chamber also having a circular opening m its top, a removable cover-plate for said opening, an inlet pipe threaded to an opening in said cover-plate, a cylindrical strainer having its upper end in open communication with said inlet pipe, and

' suspended in said chamber by an integral marginal flange clamped between the outer edge of the opening in said top and the under face of said cover plate, a chamber in said pump casin having a passage therethrough V in direct a ignment with said constricted passage through which fuel will gradually discharge into the pump chamber when the pump is idle, and a fuel outlet at the base of the pump chamber in direct vertical alignment with said pump chamber, constricted ble therein, a primin chamber of globular form mounted on sai casing, said chamber having a lower reduced portion or neck, a threaded sleeve having one end screwed into said neck and the other end screwed into said casing in alinement with the inlet to saidcasing, said sleeve forming a constricted passage leading from the priming chamber directly into the pump chamber; said priming chamber having an o ening in its top, a removable cover for sai openin a cylindrical strainer suspended in said c amber by an integral marginal flange clamped between said top and cover-plate and an inlet pipe entering an opening through said cover,

whereby thepriming chamber is adapted to gradually discharge its contents into said pump chamber when the pump is idle, so that the pump may be started without priming.

In testimony whereof I afiix my signature in the presence of two witnesses.

JOHN SCHEMINGER, JR.

Witnesses:

B. M. Orrn'rr, THOMAS F. BURKE.

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