US1240489A - Rotary pump. - Google Patents

Description

- F. C. RO-OD.

RQTARY PUMP. APPLICATION FILED JULY 20, 19M.

Patented Spt. 18,

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FLETCHER C. HOOD, OF PCBTLAND, QBJEGON.

ROTARY PUMP.

Specification of Letters Patent.

Patented Sept. 18,1917.

Application filed July 20, 1914. SeriaI No. 851,925

struction in which each of the rotary impellers alternately rotates a half revolution and then stands still while a companion impeller rotates a half revolution, said impellers thus operating at all times to form a partition or division across said casing chamber, with one portion of the chamber serving as an inlet or receiving chamber, and the other portion thereof as a discharging chamber. Thus by making possible this intermittent revolution of the impeller and alternating them, the chamber within the casing is divided at all times into two noncommunicating chambers, one of which is a receiving chamber and the other is a discharging chamber.

In order that others may understand my invention, 1 have shown one practical embodiment thereof in the accompanying sheet of drawings, which will now describe.

Figure 1 is a top plan view of one form of the invention with a portion of the casing broken away and parts shown in section;

Fig. 2 is an end view thereof showingv one kind of gearing connection with which 1 am able to accomplish the alternate intermittent movements of the impellers or vanes;

Fig. 3 is a sectional view taken on line 33 of Fig. 1, showing the inside arrangement of the impellers, and also the inlet and exhaust ports; and

Figs. 4: and 5 show one pair of the cooperating intermittent gears for eifecting the alternate intermittent drive of the impeller.

Referring now to the drawings, 1 designates a casing, here shown of elliptical form in cross section, with inlet and discharge ports, as 2 and 3. Mounted within said casing are two impellers 4 and 5, shown more clearly as to their form and cooperative arrangement in Fig. 3, which shows the end view thereof. Certain of the outer portions or edges these impellers are shown rounded, as at r and 5, while other portions thereof, as from the bul e or middle to the end shown straight, as at l and 5 said surfaces being shaped so as to give the best bearing engagement thereetween in their rotative movements. Thus assuming that impeller 5 is standing still in the crosswise'position shown inFig. 3, and that impeller i is revolving in the direction indicated by the arrow, as soon as impeller reaches the position shown in dotted lines, its bearing surface at l nearest its shaft, engages the rounded outer surface 5 of impeller 5, with the greatest leverage, and gives to impeller 5 an initial movement, which is continued by the gear connection hereinafter again referred to. The impeller a then assumes a crosswise position and stands still until the oppositeend of the impeller 5 makes a half revolution and gives to it a starting movement, which is continued by the gear connection, which I will nowdescribe.

Each of the impellers at and 5 is provided upon its carrying shaft, outside the casing 1, with anintermittent gear member, as 6 and 7, respectively, adapted to .m'esh, respectively, with two intermittent driving gears, as 8 and 9, mounted upon a driving shaft 10, which may be driven by hand, as with a crank 11, or by any power mechanism desired.

The intermittent gears 6 and 7, mounted upon the impeller shafts are provided at their opposite sides with smooth concaved portions, 6 and 7, instead of a continuation of their teeth, while the gears 8 and 9 are provided with teeth only for a portion of their circumference and are left full or solid in conical form for the balance thereof, as at8 and Assuming that shaft 10 is being revolved and-with it gears 8 and 9, the toothed portion of the gear 8 is in mesh with the toothed portion of the gear 6 and is therefore driving gear 6 and its impeller 4, while a solid portion of gear 9 is turning in one of the concaved portions 7 in gear 7, thus leaving gear 7 and its impeller astanding still. Under this action, impeller 4 moves to the position shown in dotted lines, Fig. 3, where it engages impeller 5 and imparts to it an initial movementwhich operates to turn its gear 7 sufficiently to bring its teeth into mesh with atoothed portion of the gear 9, which has reached that point, which connection continues the movement of the impeller In the meantime the concaved portion 6' of gear 6 and the solid portion 8 of gear 8 have moved together, leaving gear 6 and its impeller at standing in a crosswise position until impeller 5 makes another half revolution and its opposite end engages impeller at and gives to it an initial movement sufiicient to move its gear 6 again into driving engagement with the toothed portion of gear 8. Thus by revolving shaft 10 and the gears 8 and 9 continuously, the gears 6 and 7 are given alternately a half revolution, and impart the same movement to the impellers or vanes l and 5, which operate to cause an inrush of fluid through inlet 2, and to force it out through discharge port 3, in a manner well understood.

I am aware that slight changes can be made in the embodiment of my invention here shown for purposes of illustration without departing from the spirit thereof, and that different driving connections can be used to impart the alternate intermittent movement to the impellers, and I do not, therefore limit myself to the form here shown, except as I may be limited by a broad interpretation of the hereto appended claims.

I claim;-

1. In a rotary pump, a casing with inlet and discharge ports, rotary impellers mounted to revolve upon independent parallel shafts s aced apart therein, and means for driving said impellers with an intermittent and alternating movement, said impellers being adapted to have a rolling contact with each other as they come together.

2. In a rotary piunp, a casing provided with inlet and discharge ports, two rotary impellers having convened faces and mounted to turn about parallel axes within said casing, and driving connections adapted to drive said impellers alternately for a portion of a full revolution at a time.

3. In a rotary pump, a casing having inlet and exhaust ports, rotary impellers mounted upon spaced parallel shafts therein in cooperative relationship with each other, a drivin member adapted to be continuously driven, and intermittent driving connections from said driving member to said impellers designed to alternately drive them a portion of a revolution at a time, said impellers having rounded contacting faces and adapted to have intermittent rolling engagement with each other, for the purpose specified.

It. A rotary pump of the character referred to comprising in combination, a casing provided with inlet and discharge ports, two cooperating impellers 'rotatably mounted to turn about parallel, spaced axes therein and adapted to have a rolling bearing engagement one with the other, a driving member adapted to be continuously driven,

and intermittent drivin connections from' said member to said impellers adapted to alternately drive them for a portion of a revolution only at one time.

5. In a rotary pump, the combination with the casing and the cooperating impellers revolubly mounted therein, of a driving mechanism comprising a continuously driven member, and intermittent gear members connecting said impellers with said driven member and arranged to impart alternately to said impellers a part of afull revolution, each impeller being adapted to give to the other an initial movement to put its gear members into action.

6. In a rotary pump, the combination of a casing provided with inlet and discharge openings, two rotary impellers mounted therein in cooperating relationship with each other, a driving shaft, intermittent gear members mounted on said shaft and intermittent gear members mounted on said impellers, said gears being connected with each other in pairs and said pairs being adjusted to alternately and intermittently drive said impellers for a portion of a revolution at a time, one impeller being adapted to engage and impart an initial movement, to the other, substantially as described.

Signed at Portland, ltIultnomah county, Oregon, this 14th day of July, 1914.

FLETCHER G. vROOD.

In presence of:

F. E. LITZENBERG, CLYDE Evans.

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

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