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Publication numberUS721207 A
Publication typeGrant
Publication dateFeb 24, 1903
Filing dateAug 25, 1902
Priority dateAug 25, 1902
Publication numberUS 721207 A, US 721207A, US-A-721207, US721207 A, US721207A
InventorsJames B C Lockwood
Original AssigneeJames B C Lockwood
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Rotary pump.
US 721207 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

No. 721,207. PATENTED FEB. 24, A1,903.


APrLIoA'rIoN FILED AUG. 25. 1902.




W/TNESSES.' v -NVENTOH v .f (Zac/wauw .l M 5y ATTORNEY J. B. '0. LOGKWOOD.




A nohwfr PATENTED FEB. 24, 1903.





SPECIFICATION forming part of Letters Patent No. 721,207, dated February 24, 1903.

i Application tiled August 25,1902. Serial No. 120,874. (No model.)

To all whom t may concern:

j Beit known that I, J AMES B. C. Locxwoon, a citizen of the United States, residing at Seattle, inthe county of King and State of Washington, have invented certain new and useful Improvements in Rotary Pumps, of which the following is a speciication, reference be-v ing had therein to the ings.

This invention relates to improvements in rotary pumps, having special reference to that class of pump used for hydraulic dredging, wherein large quantities of water carrying rock, sand, and other gritty substances have to be handled.

The object of the invention is to prevent Wear of the main casing of pump and to facilitate repairs, thereby making frequent renewals of pumps unnecessary, also maintaining approximately a maximum efficiency.

To these ends my invention consists in certain novel features of construction and combination of parts, which will be hereinafter described and claimed. A

In the accompanying drawings, Where similar gures of reference indicate corresponding parts in the three views, Figure 1 is a vertical transverse section of pump embodying my improvements, taken on line w ofFig. 2. Fig. 2 is a vertical longitudinal section of same on line y y of Fig. 1. Fig. 3 isa front elevation of a portion of runner 13. A

The driving-shaft 2 is so mounted in journal-bearings (not shown in drawings) as to be concentric of the containing-case 4, which containing-case has a central induction-opening 5 and a tangential orifice 6. lt is preferable to make both heads or covers 7 and 8 detachable of the case for convenience of access. The case 4 is secured against distortion by the annular groove and corresponding tongue 11 and is packed by rubber gaskets fitting into annular grooves 10.

The pump-runner 13 is provided with two peripheral plate-rims 14, which form shrouds for a plurality of curved blades 15 16, secured therebetween, the alternate ones 15 continuing to the runner-hub 17 and are preferably made integral therewith, as are also the stiffening-ribs 18.

Secured to the external surface of each rim-plate are vanes 19,'positioned opposite to accompanying drawand of the same curvature, preferably, as the adjacent aforesaid shrouded blades or portions thereof. These vanes extend from the outer edge of peripheral plate-rims to rings 20 and 21, secured, respectively, in proximity to the inner edge of said rims and to liners attached to covers. As the runner rotates the vanes centrifugally expel any sand or other gritty substance which has a tendency to collect between the runner-shrouds and the covers. The said rings 2O and 21' are to prevent, so far as practicable, the passage of Water and grit into the space occupied by the vanes 19; also, together with the said vanes to prevent any tendency to backflow or local circulation. In the event of the said rings becoming slightly worn the passage therebetween' would not materially interfere with the pumps efficiency, as the leakage thereat would be from the axis outwardly on account of the flow created by the revolving vanes.

The coverS is made With a concentric shoulder 23 for-the purpose of offsetting of spreading the cover-liner 22 and the adjacent shroud,

so'that the inner face of the latter will be in the same plane with the disk-liner 24 of head 8.

The opposite head 7 is protected from Wear by a lining-piece 24', as is also the inner peripheral surface of the case by liner 25, which with the outer cover-liners 22 24' project into the discharge-orifice Lining-pieces 2G, preferably made in two parts, as shown in Fig. 2, are provided for the induction-opening 5 to protect the same from wear. The inner part of the last-named liner extends in a curve interiorly of the pump to be iiush or even With the inner face of the adjacent shroud of runner, while the other part is inserted from the outside and overlaps the rst one. All of the aforementioned lining-pieces are so disposed as to provide-unobstructed lead and discharge Ways for the conveyed material andare detachably secured to the various parts of the case for which fitted by suitable bolts with inner countersunk heads and screw-nuts external of the shell, which are so arranged that they may be readily gotten at'when it is desired to replace an individuall piece.

The operation and advantages of the invention will be apparent from the foregoing dcscription; but it may be mentioned that the IOO combination of the runner-shrouds whereby the axial thrust is overcome, together with other features of construction hereinbefore referred t0, provides adredging-pump far in advance of any other which has come to my notice.

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

1. The herein-described pump, comprising a case having a centralrinduction and a tangential discharge-opening; an annular shoulder upon the end opposite said inductionopening; a runner concentric of said case and provided with tangentially-disposed curved blades; a shroud upon each of the opposite longitudinal ends of said blades; a ring secured to the external surface of each shroud in proximity to its inner periphery; curved vanes extending from said rings to the outer periphery of said sh'rouds; liners covering the entire inner surfaces of said casing,said liners comprising a peripheral casing-lining, a disklining upon surface opposite said inductionopening; a two-part liner for said opening, the inner part of said induction-lining and corresponding surface of said disk-lining being respectively even with inner surfaces of adjacent said runner-shrouds, a concentric liner upon each of said casing-covers and severally provided with a ring adjacent to their inner peripheries and contiguous with said rings of the shrouds; and the last-named rings, substantially as and for the purposes set forth.

2. The combination with a case having a central induction and a tangential dischargeopening, a liner in said induction-opening projecting interiorly beyond the surface of that end, and a liner upon the opposite end projecting inwardly from said end; of a runner having curved blades and shrouds upon the opposite longitudinal ends of said blades so that the inner surfaces of said shrouds will be in the same plane respectively with the inner end of the induction-liner and the said end liner, substantially as described.

3. The combination in a pump having central induction and tangential discharge openings, a shrouded runner mounted on a driving-shaft concentric of the pump-case, of an annular shoulder on one of the covers of said case whereby the shroud of said runner projects longitudinally beyond the central p0rtion of the said cover or a liner attached there to, substantially as set forth.

4. In combination with a pump having a central induction-opening and a tangential discharge-opening, a blade-shrouded runner concentric of the pump-case, of liner for said induction-opening made in two overlapping parts respectively adapted to be inserted from the opposite sides of the casing-cover, the inner end of the said lining being in the same plane with the inner surface of the adjacent runner-shroud, substantially as set forth.

5. The combination with the pump-casing provided with a concentric runner having curved blades, shrouds on longitudinal ends of said blades, and liners upon the interior surfaces of said casing, of a pair of contiguous rings adjacent to the inner periphery of said shrouds, one of each pair of rings being secured to the adjacent shroud and the other to the said liners, substantially as described.

In testimony whereof I afx my signature in presence oftwo witnesses.




Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2419676 *Apr 29, 1943Apr 29, 1947Curtis Pump CoBooster pump
US2537084 *Sep 4, 1948Jan 9, 1951Morris Machine WorksFabricated centrifugal pump
US3079866 *Jul 16, 1959Mar 5, 1963Texaco IncModified centrifugal pump
US4820115 *Nov 12, 1987Apr 11, 1989Dresser Industries, Inc.Open impeller for centrifugal compressors
US5566696 *May 26, 1995Oct 22, 1996White Consolidated Industries, Inc.Dishwasher with balancing vanes on pump impeller
US8998576Nov 3, 2011Apr 7, 2015Pentair Water Pool And Spa, Inc.Pump with hydraulic isolator
Cooperative ClassificationF04D29/4286