US1297749A - Rotary pump or engine. - Google Patents

Description

J. A. SVENSSON.

ROTARY PUMP 0R ENGINE.

APPLICATION FILED SEPT-12,1911- 1,297,749. Patented Mar. 18,1919.

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.' STATES PATENT OFFICE.

JOHAN ALBERT SVENSSON, OF STOCKHOLM, SWEDEN, ASSIGN'OR, BY MESNE ASSIGN-,

MEN'TS, T LUDWIGSBERGS VERKSTADS .AKTIEBOLAG, 0F STOCKHOLM, SWEDEN".

T 0 all whom it may concern: 7

Be it known that I,'J0HAN ALBERT SVENS- soN, a subject of the King of Sweden, and resident of Hornsgatan 66 Stockholm, in the Kingdom of Sweden, have'inv'ented certain new and useful Improvements in R0- tary Pumps or Engines, of which the following is a specification, reference being had therein tothe accompanying drawing.

In rotary pumps or engines hitherto used of the class, in which a pluralityof pistons, movable axially in a rotary drum, are actuated by an oblique, rotatable disk there are some difficulties with regard to the means causing the disk to partake in the rotary motion and as to the keeping of the same in a central position during the said motion. Means hitherto used are comparatively expensive and cause difficulties with regard to the space available. Thus, for instance, for keeping the oblique disk in its central position during its rotary motion a ball bearing provided at the periphery of the disk often is used. The said construction, however, involves the disadvantage of a comparatively great rotary velocity being imparted to the balls and is unsuitable for pumps for water and impure liquids.

The object of this invention is to remove the said disadvantages in rotary pumps of the said class. In pumps, in which the drum and the pistons at opposite sides of the oblique disk are located symmetrically with relation to one another, the said object is gained by arranging the pistons proper in such manner, that they cause the oblique disk to rotate, the pump being then so arranged, that always two pistons at least located diametrically or substantially diametrically oppositely with relation to one another bear against abutments provided for the oblique disk at each piston and thus cause the disk to partake in the rotary motion and also keep the same in a central position.

Figure 1 in the accompanying drawing shows a rotary pump arranged in accordance with this invention and in a section on the line 0-p of Fig. 2. Fig. 2 is a cross section on the line qr of Fig. 1. Fig. 3 is a section on a greater scale of the means connecting the piston with the oblique disk. Fig. 4 is an end view of the same.

The arrangement of the suction and delivery chambers of the pump and their coni Specification of Letters Patent.

Application filed September 12, 1917. Serial No. 191,052.

Romany PUMP 0R ENGINE.

nection with the suction and delivery pipes are not shown in the drawing as they form no part of this invention.

The drum 1, which is'divided transversely shaped disk 4 is provided, in which radial pins 5- are located extending inward toward the center of the disk 4. One pin5 is provided for each piston. The pins 5'extend into openings 6 provided in balls 7 respectlvely, fitted into two cup shaped pieces 8,9 located in cylindrical recesses '9 pro+ vided in the pistons. The said cup shaped Patented Mar. 18, 1919.

cal surfaces 11 of the cup shaped pieces 8, 9

v are adapted to transmit the pressure of the piston 3 in the rotary direction of the drum to the pin 5 and the disk 4, so that the latter is caused to partake in the rotary motion of the drum. 1. In Fig. 2 the cylindrical surfaces of the pieces 8, 9 coincide with the periphery of the ball. The cup shaped pieces 8, 9 fit into the recess 9 in such manner, that the end surfaces 10 of the said pieces bear closely against the end surfaces of the said recess as shown in Fig. 1, while there is a play between the cylindrical surfaces 11 of the cup shaped pieces and the cylindrical surface of the said recess 9*, as shown in Fig. 2. The disk 4 is kept in its oblique position by two forks 12, fixed to the casing 13 of the pump, and by two rollers 14, rotating on pins fixed to the said casing.

The described means for causing the oblique disk 4 to partake in the rotary motion of the drum 1 operate in the following manner:

The angularity with which the disk 4 is arranged with respect to the longitudinal axis of the drum 1 and shaft 2, causes the radial pitch line of each of the pistons 3 and their respective pins 5 to coincide with one another when in the plane of the lines st and 0-;0. In all intermediate planes on the other and the radial pitch lines of the pins and the pistons are displaced with relation to one another, the radial pitch lines of the pins being located nearer to the Plane st than those of the pistons. The said displacement is greatest in a plane forming an angle of 45 degrees to the plane st or in the planes 20- 0 and w-y. By suitably adapting the play between the cylindrical surfaces 11 of the cup shaped pieces 8, and the sides of the recesses 9 respectively, the said pieces 8, 9 :will' bear against the pistons 3 (at [the points m) located in one of the oblique planes, for instance the plane uu and in the vicinity or the said plane, while in the other oblique plan wg and in the vicinity of the same there is a minimum play between the cup shaped pieces and the pistons (at n) at'the front side of the pistons with relation to the rotary direction. Con.- sequently, during the rotary motion of the drum the pistons will successively bearagainst the cup shaped pieces at the vicinity of the plane uo substantially as the teeth of a gear and, owing to the fact that always twoapistons, located substantially diametrically with relation to one another, actuate the disk 4 and the minimumiplay between the pistons and the cup shaped pieces located in themot'her plane cc or in the vicinity of the same prevents the disk from sliding, the disk is caused during the rotation to occupy a central position with relation to the other. rotating parts. The pistons must not necessarily bear against the surfaces 11 of the cup shaped pieces 8, 9 but may for instance bear against adjusting plates or screw bolts fixed to the pistons.

Owing to the fact that the pants efiecting the connection between the pistons and the oblique disk are moved throughvery slightbination Witha rotary drum, pistons movable longitudinally in said drum, vand an oblique dis-k surrounding the drum, of a joint between the said p stons respectively and the said disk, in which one part is 7 located in the piston with a play transversely of the same.

2. In a rotary pump or engine the combination with a rotary drum, pistons movable longitudinally in said drum, and an oblique disk surrounding the drum, of radial pins connected with said disk, balls provided on the pins respectively, and cupshaped parts connecting the balls withthe pistons, a play being provided between the said cup-shaped parts and thepistons transversely of the latter.

In witness whereof, I have hereunto signed my name.

JDHAN ALBERT SVE'NS-SON.

Copies of thispatent may be obtained 1or five cents each, by addressing the Commissioner of Patents.

Washington, D. 0.

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