US1012237A

US1012237A - Rotary pump.

Info

Publication number: US1012237A
Application number: US63088111A
Authority: US
Inventors: Dwight S Bond
Original assignee: WILLIAM M FLAGG
Current assignee: WILLIAM M FLAGG
Priority date: 1911-06-02
Filing date: 1911-06-02
Publication date: 1911-12-19
Anticipated expiration: 1928-12-19

Description

D. S. BOND.

ROTARY PUMP. APPLIUATIQN FILED JUNE 2, 1911. 1,012,237, Patented Dec. 19,1911.

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APPLICATION FILED JUNE 2, 1911.

Patented Dec. 19, 1911.

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UNITED STATES PATENT OFFICE- DWIGHT S. BOND, OF CONWAY, MASSACHUSETTS, ASSIGNOR 0F ONE-HALF TO' WILLIAM M. FLAGG, OF CONWAY, MASSACHUSETTS.

ROTARY PUMP.

To all whom it may concern:

Be it known that I, DWIGHT S. BOND, a

citizen of the United States of America, re-

siding at Conway, in the county of Franklin and State of Massachusetts, have invented new and useful Improvements in Rotary Pumps, of which the following is a specification.

This invention relates to the class of rotary pumps of the rotary wing piston type, the object of the invention being to provide an improved construction of this type of pumps, all as fully set forth in the following specification and pointed out in the claims.

The invention is clearly illustrated in the accompanying drawings in which,-

Figure 1 is an end elevation of a pump embodying the improvement,one of the side plates having been removed,the shaft and a part of the in-take portion of the easing being shown in section substantially on line 1--1, Fig. 3. This shows the position of the parts at the end of the discharge stroke. Fig. 2 is a perspective view of one of the side plates of the pump casing, together with the wing piston and the movable partitlon located between the inlet and the outlet ports of the casing. Fig. 3 is a sectional, plan view, substantially on the line 33, Fig, 4:. Fig. 4 is a view similar to Fig. 1 showing the position of the parts on the ln-take stroke.

Referring to the drawings, the pump casing a is in the form of a cylindrical casting having a box-like extension 6 on one side thereof, in the upper end of which is the outlet 0 and in the lower end the inlet cl,these two ports being separated by a partition 6, the box-like extension 5 communicating on both sides of the said partition with the interior of the casing a, as clearly shown in Figs. 1 and 4. The casing proper is provided with the annular flanges f to which are bolted the flanged rings 9 and h which extend inward beyond the wall of the casing a, as at 70, to constitute an annular support for the border of the end plates m which hermetically seal the opposite sides of the cylindrical casing. Extending centrally. through the end plates m is a driving-shaft 0 supported in bearings 22 cast integral with the rings 9 and .h. The wing piston q is cylindrical in form and is fixed on the driving-shaft 0 and has the end plates m rigidly secured thereto, as by the Specification of Letters Patent.

Application filed June 2, '1911.

Patented Dec. 19, 1911. Serial No. 630,881.

screws 7". The shaft 0 extends through the piston g eccentric thereto, the degree of eccentricity of the piston within the casing being such as to bring the periphery of the piston tangent to the cylindrical interior wall thereof. At the point of contact of the piston with the interior wall of the casing a bearing plate 8 of suitable metal is let into a transverse groove in the piston, this plate resting upon a resilient cushion t of rubber, preferably, whereby it may always have a yielding bearing against the inner wall of the casing. Located in the partition wall 6 between the outlet port 0 and the inlet port d is a swinging partition to having a hingesupport at w in said partition wall 6 and extending from one of the plates m to the other and fitting closely between said plates. Fitted in the periphery of the piston Q is a shoe y with which the inner edge of the movable partition w is hinge-connected, as at 3. Between the back side of the partition w and the casing is a spring 4 whose function is to press said swinging partition toward the piston. Between said partition and the shoe g bearing on the piston is another spring 5 whose function is to hold the shoe y to a bearing on the piston, it being of course understood that the shoe 1 is of the same width as the partition u; with its ends fitting closely against the plates m. It will be seen that by this construction, when the 1 parts are in the position shown in Fig. 4 for example, the interior of the pump casing is divided into two parts by the partition to, the shoe y and the piston, and that the inlet port (Z is on one side of this partition and the outlet 0 on the other. 7

Located over the in-take port 61 and within the lower portion of the box-like extension Z) of the casing is a clapper-valve 6 hinged to the casing, preferably, and operating like a check-valve to prevent any water from being forced back through the inlet pipe while the piston is moving from the position shown in Fig. 1 to a point just past the opening 7 leading from the lower half of the extension chamber 6 into the casing. For while the piston is passing through this portion of its circular path it would, were it not for the valve 6, tend to force more or less water back through the inlet port.

Any movement of the water, however, in

this direction tends to close that port.

It will readily be seen from the above description that as soon as the contact point of the piston g has passed the openings 7 leading to the inlet port, the continued movement of the piston in the direction of the arrow will tend to create suction through the inlet port, this same movement of the piston pushing before it water that has been drawn into the casing on the preceding stroke, the casing being filled at each revolution of the piston.

By making the end plates at rotatable with the piston the packing of the edges of these plates is rendered necessary in order to provide a tight pump-casing, and this packing is readily effected by beveling the edges of the end plates, as at 8, and inserting in an annular groove turned in the flanged rings 9 and h a packing ring 9 of suitable material, this ring being backed up by a metal ring 10 against which bear the ends of bolts 12 whereby the packing ring 9 may be forced against the beveled edge of the plates m to provide a water-tight joint at that point.

The packing plate 8 is made of sufficient width to permit it to pass from the interior wall of the casing, as shown in Fig. 1, over onto the shoe 3 to the end that it may engage one side of the shoe before leaving the casing, and at the other side of the shoe that it may engage the casing before leaving the shoe, thereby insuring its smooth rotation; the shoe 3 serving not only as a part of the movable partition extending transversely of the casing but serving also to carry the bearing plate 8 across the break in the cylindrical wall of the casing at the point where the extension chamber Z) opens into the latter. The small openings 7 in the wall of the casing near the inlet port are solely for the purpose of affording a proper bearing for the plate 8 after it has moved past the lower end of the shoe 3 Otherwise, these small open ings have no function.

What I claim, is

1. A rotary pump of the class described comprising a cylindrical casing having a two-part offset chamber on one side thereof, each part of said. chamber communicating with the interior of the casing, inlet and outlet ports being located respectively in said two parts of the chamber; a shaft extending axially through the casing, a cylindrical wing piston eccentrically secured on the shaft, the periphery of the piston being tangent to the inner wall of the casing; a swinging partition supported by one end in the casing, a shoe having a bearing on the piston and constituting a support for the other end of said partition, and two circular side plates constituting a closure for the ends of the casing, said plates being fixed to the piston and rotating therewith; a checkvalve in the inlet port, and means to press the swinging partition yieldingly toward the piston.

2. A rotary pump of the class described comprising a cylindrical casing having a two-part offset chamber on one side thereof, each part of said chamber communicating with the interior of the casing, inlet and outlet ports being located respectively in said two parts of said chamber; rotatable plates constituting closures for the ends of the casing, and wings secured to the casing to retain the plates, a packing being provided between the rings and said plates; a shaft extending axially through the plates and casing, and a cylindrical wing piston eccentrically secured on said shaft and to said plates, said piston being tangent to the inner wall of the casing; a shoe having a bearing on the piston, and a swinging par tition hinge-support on the shoe and on the casing, and means to press the shoe and partition yieldingly toward the piston, and a check-valve located in the inlet port.

3. A rotary pump comprising a pump chamber, inlet and outlet ports thereto, rotary pumping means in the chamber, a central shaft to rotate said pumping means, end closing walls for said chamber fixed to said shaft and rotatable therewith, an annular retaining ring fastened to the side walls of said chamber for each endclosing wall, anda packing between said retaining rings and said end-closing walls.

I DWIGHT s. BOND.

Vitnesses 711. H. CHAPIN, HARRY WV. BOWEN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.