US2443994A

US2443994A - Rotary pump

Info

Publication number: US2443994A
Application number: US25610A
Authority: US
Inventors: Scognamillo Salvatore
Original assignee: Individual
Current assignee: Individual
Priority date: 1948-05-07
Filing date: 1948-05-07
Publication date: 1948-06-22
Anticipated expiration: 1965-06-22

Description

Patented June 22, 1948 UNITED STATES PATENT orrica Salvatore Scognamillo, New York, N. Y.

Application May 7,1948, Serial No. 25,610

This invention relates to rotary pumps. engines or compressors of the crescent chambered type wherein a plurality of radially disposed blades are positioned in a pressure chamber having a circular peripheral wall, and actuated by an eccentrically positioned rotor; and in particular the invention relates to a rotary device having radially disposed blades with pins extending through the blades and with the ends of thepins extending into traveling channel-shaped rings in recesses in the ends of the housing wherein the rings are concentric to the inner peripheral surface of the chamber and rotated with the blades.

This invention is a continuation inpart of my co-pending application for a rotary pressure pump or compressor filed September 8, 1947, withthe Serial No. 772,716, now abandoned, in'that the pins in the blades are described as being free to rotate or move longitudinally and the channelshaped rings are described as adapted to slide or travel with the blades.

The purpose of this invention is to provide an improved rotary pump wherein radially disposed blades in a rotor are maintained in fixed positions with their outer edges in continuous wiping contact with the inner surface of the surrounding housing so that both the shock or friction load caused by the blades sliding into and out of the rotor is eliminated. r

In the usual rotary pump or engine the blades are crowded into openings in the rotor and a frictional contact of the blades with the surface of the surrounding housing causes thrust that results in an excessive load against the corners of the slots of the rotor. Various devices such as springs and air cushions, and the like have been used to increase the efllciency of rotary devices of this type but the lateral thrust continues to cause excessive wear as the blades bind in the slots. With this thought in mind, this invention contemplates means in a rotary device of this type for permanently positioning the blades with their outer edges outward against the surface of the surrounding housing and an eccentrically moving rotor for actuating the blades which slides outward and inward on the blades.

Other attempts have been made to hold the blades by stationary pins at the ends and also with rollers on the pins but fixed pins for this use are subjected to considerable wear and shear ofl'rap- 3 Claims. (Cl. 103-136) 2 idly. For this reason applicant mounts pins freely in openings through the blades so that the pins are free to-turn as they contact the surface of the rings and are also free to slide through the blades as uneven surfaces are contacted or as wear develops in the parts.

The object of this invention is, therefore, toim-.

prove the construction of rotary pumps, engines,

compressors and the like wherein blades are held in fixed positions and actuated by a centrally disposed eccentrlc member which merely pushes the blades along without causing binding in the actuating member. I 7

Another object of this invention is to provide a rotary pump. engine, compressor or the like wherein the blades are mounted in such a manner that the device may be actuated at veryhigh speeds.

A furtherobject of the invention is to,provide a rotary pump, engine, compressor or the like wherein radially disposed blades are actuated by a central member which is eccentrically positioned and in which the blades are held by a channelshaped traveling ring through extending pins,

which is of a simple and economical construc-.

tion.

With these and other objects and advantages in view, the invention consists of a housing having a chamber with a circular outer wall and provided with inlet and discharge cor. iections, a rotor mounted in the housing and eccentrlcally positioned in the chamber, a plurality of radially disposed blades positioned in the chamber with the outer edges contacting the inner surface of the circular wall and with the inner edges slidable in radailly disposed slots in the rotor, and pins extending longitudinally through the blades and into the channel-shaped rings freely mounted in recesses in the ends of the housing.

Other features and advantages of the invention will appear from the following description taken'in connection with the drawings, wherein:

Figure 1 is a vertical longitudinal section through the pump wth parts broken away, and shown inelevation.

Figure 2 is a view showing. an end elevation of the pump with the parts assembled, and with the end plate omitted.

Figure 3 is a view showing an end elevation of the rotor with the blades omitted and illustrating the positions of the blade receiving slots therein.

Figure 4 is a view showing the pump end plate or cover. v

Figure 5 is a sectional view through the pump cover.

Figure 6 is a cross section through the channelshaped ring that holds the extending ends of pins in the blades.

Figure 7 is a view showing a side elevation of one of the blades with a pin freely mounted therein.

Figure 8 is a view showing an end elevation of one of the blades.

Referring now to the drawings wherein like reference characters denote corresponding parts the rotary device of thi invention includes a housing 8 having a bearing section 2 and a pump chamber 3. The housing is provided with an intake connection 4 and a discharge connection 5 with passages 6 and 6' providing communicating means between the connections and pump chamber 3, respectively.

The bearing section of the housing is provided with a bearing 1 for the shaft 8 on the end of which the rotor 9 is mounted, as shown in Figure 1. The rotor is provided with axially disposed slots I in which blades II are positioned which extend into the crescent-shaped area l2 in the chamber 3. The outer edges of the blades are held in continuous engagement with the peripheral wall l3 of the chamber 3 by pins M extending through openings Ila in the blades and provided with extending ends l that are positioned in channel-shaped rings l6 which form tracks IT. The openings Ila in the blades are slightly exaggerated in Figure 7 to illustrate that the pins are freely positioned in the blades so that parts without departing from the spirit of the invention.

What is claimed is: 1. In a rotary device, a casing having a substantially cylindrical chamber with inlet and outthey may rotate independent of the blades or slide axially therein, and the rings I6 are also freely positioned in the recesses 20 and 20' in the housing and cover l8, respectively. The ends of the pins frictionally engage the rings, dragging the rings around therewith. The pins are floating in the blades and the rings are floating in the recesses.

The cover or end plate I8 is Provided with openings [9. by which it is secured in place on the housing.

With the parts arranged in this manner the blades H are retained outward with the outer edges thereof in continuous contact with the peripheral surface [3 of the chamber 3, by the pins 14, the ends of which extend into the tracks I! of the rings I6. The pins, being free to turn in the openings of the blades, are rotated by frictional contact with the rings which eliminates the usual excessive wear that develops when the pins are stationary. The pins are also free to slide back and forth through the blades as t e ends contact uneven surfaces in the channels that result from warp, wear and the like.

With the blades held continuously outward against the inner wall of the chamber in which they are positioned the device may be rotated at comparatively high speeds with very little wear.

The inlet and outlet ports are so positioned that the rotor which is positioned to substantially engage the wall of the chamber at a point between the inlet and outlet ports may be rotated in either direction, that is clockwise or counterclockwise, and as the rotor is rotated the blades travel around the chamber, passing through the crescent-shaped area, and being held outward in continuous engagement with the inlet ports therein, a rotor eccentrically positioned in the chamber and having substantially radially disposed slots therein, blades in the cylindrical chamber and positioned in the slots of the rotor for relative sliding movement with the rotor .through the slots thereof, pins freely mounted for rotary and axial movement in and with respect to said blades, said pins having ends extending beyond the ends of the blades, and channel shaped rings freely mounted in the housing at the ends of the rotor with the ends of the pins positioned in the channels in the rings and adapted to rotate the rings by frictional contact therewith, said rings positioned concentrically with respect to the cylindrical chamber and maintaining the outer edges of the blades in continuous wiping contact therewith.

2. In a rotary device, a casing having a substantially cylindrical chamber with inlet and outlet ports therein, a rotor eccentrically positioned in the chamber and having slots therein, blades positioned in said slots for relative reciprocal movement therein, pins freely mounted for rotary and axial movement in and with respect to said blades, said pins having ends extending beyond the ends of the blades, and channel shaped rings freely mounted in the housing at the ends of the rotor with the ends of the pins positioned in the channels in the rings and adapted to rotate the rings by frictional contact therewith,

said rings positioned concentrically with respect the housing and eccentrically positioned in the chamber with the peripheral surface thereof engaging the inner wall of the chamber at a point between the inlet and outlet ports, said rotor having axially disposed slots therein extending inextending into the grooves in the floating rings suspending the blades with the outer edges thereof in continuous wiping contact with the peripheral wall of the chamber and with the inner edges in the slots of the rotor wherein in the operation of the pump the rotor slides over the blades continuously moving in the chamber,

SALVATORE SCOGNAMILLO.

(References on following page) REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date' Bretherton Feb. '7, 1899 ,Hays et a1 Aug. 8, 1899 Fortune-s00 et a1. Sept. 9, 1902 Williams Aug. 7, 1906 Loeflier Dec. 18, 1906 Olson Jan. 14, 1919 Munn Nov, 4, 1919 Kutchka Apr. 13, 1920 Kuhn Oct. 6, 1931 Number Name Date Cowherd Mar. 2, 1943 FOREIGN PATENTS Country Date Great Britain 1875 Great Britain 1882 France May 27, 1924 (Addition to 567,879)

Germany Aug. 21, 1890 Great Britain Aug. 19, 1920 Great Britain Dec. 9, 1926 Germany Nov. 11, 1925 Germany Apr. 12, 1933 France -1 Mar. 13, 1926