US1043936A - Rotary blower or pump. - Google Patents

Description

J. T. HOPE.

ROTARY BLOWER OR PUMP` APPLIGAToN FILED 1350.19, 1910.

aff

'UNITED STATES- PATENT OFFICE.

JOHN 'I'. HOPE, OF KANSAS CITY, MISSOURI, ASSIGNOBi TO JOHN FRANCIS HOPE, OF

` KANSAS CITY, MISSOURI.

i ROTARY BLOWER R PUMP.'

Specification of Letters Patent.

Patented Nov. 1 1912.

pumps, and has for its object to produce.

mea'ns for producing a blast of air or for pumpin water or other liquid, which operates e v'cientlyand economically and is of simple, strong, durable and inexpensive construction.

With this object in view the invention consists in certain novel and peculiar features of construction and organization as hereinafter described and claimed; andin ordei` that it may be fully understood 'reference is to be. had to the accompanying drawin s, in whichigure 1 is a vertical section on the line I-I of Fig. 2,*with certain parts in elevation. Fig. 2, is a horizontal section on the line lI-II of Fig. 1. Fig. 3 is' al transverse .section on the line III- I I of Fig. 1.

Referring first to the bloweror pump, 1

indicates a cylindrical casing provided at its ends with outturned flanges 2, and at opposite points of its periphery with outwardly projecting receiving and discharging nozzles 3 and 4 respectively.

"The nozzles respectively communicate 35 with chambers 5 and' produced at the pe riphery of the casing by providing thc lat- 'ter with the outwardly swelled portions 7 'and 8, respectively. The cylinder is provided with V-shaped openings 9 and 10,

establishing communication between the interior of the cylinder and chambers o and 6 respectively. Thecylinder is also provided with openings l1 and 12, also establishing communication between the interior of the cylinder and chambers 5 and G, the openings -9 and 1l and 10 and 12 being of such form and relation as to provide V-shaped bridges 13 an'd 14, which respectively bridge chambers 5 and t5. The inner faces of the V- shaped bridges form a part of the inner face of the cylinder.

Adjacent to the nozzle 4, the cylinder is provided with an external enlargement I5,

formed with a recess 16, communica-ting 455 with the interior of the cylinder. and f1tt-ing in said recess is a packing plate li' ot Babbitt metal or like material, a hard metal plate 18, fitting in the recess as a backing for the plate 17, and bearing against said hard metal plate for the purpose of advancing the same and plate 1T to compensate for wear of the-latter, is a pair of bolts 19 equipped with the :ustomary loch' nuts Q0..

21 are the heads ot' the cylinder, provided with eccentric bearing hubs 22, one of them closed at its outer end as shown in Fig. 2, and secured in said hubs are Babbitt metal or equivalent linings 23, bolts 24 extendingy through the hubs and flanges 2 and securing the former firmly in place.

25 is a key securing rigidly upon shaft 26 4titted in journals 23, a rotary piston, consisting of a body and pivoted wings. The body is square in outline and its faces fit with substantially air tight joints against the inner faces of the heads 21.' At each corner the square body is provided with a hook 528, projecting in the direction in which the piston is adapted to rotate, and the outer edges of the hooks for almost their full length are curved on lincslstruclt from the center of the shaft, so that each of said curvedperipheries of the hooks, once in each revolution of the piston shall engage the packing plate 17 with an air-tight. relation;

Q9 indicates the wings, dat at their inner sides and curved at their outer sides and of suoli proportion that their outer surfaces shall, when the wings are closed, constitute a continuation of the curved lines described by the curved outer surfaces ot the hooks. It will thus be understood that when all ot the hooks are closed` the. piston forms a perfeet circle arranged eccentrically with relation to the cylindrical casing.

The 'wings are provided at their rear ends with cylindrical portions 30 constituting pivot pins snugly engaged by the hooks and are formed with curved recesses 31 receiving the free ends or terminals of said hooks.

Assuming that the blower or pump i" to be driven in the direction indicated by the arrow, it will be seen that the wings' begin to move outward by centrifugal force as they successively pass the packing plate 17, which is nearer thc axis ot' motion than any other point in the periphery of the cylinder, and that they continue to open until they reach a point diametrically opposite the plate, after which they are graduallyreclosed. the

engagement with the inner side of the eylindrical casin regulating and controlling the position o? the blades. As the blades sweep over the bridge 13, they produce a suction in nozzle 3, for any desiredpurpose, though in practice the blower is used chiefly as a part of a vacuum cleaning system, and receives the air after the dirt has been washed from the same by passing it through the water of'a tank or otherwise; the air sucked into the blower being discharged through the openings 10 and 12, chan'iber 6 and, nozzle 4, the bridge 14, covering chamber (i, effecting the closure of the wings without interfering with the discharge of the air into chamber 6 and thence through nozzle 4.

It will be apparent that the provision of bridges over openings 5 and 6 is necessary for the proper operation of the blower, and the V-shaped bridge extending for the full length of the chamber bridged is particularly desirable as it provides a wearing surface upon which each wing will bear during its progress over the corresponding chamber. Because of this the wear on the wings is uniform, and it will be unnecessary toremove them from time to time grinding.

In-actual practice the wings open and close noiselessly and this is due principally to the fact that the air interposed between each wing and the corresponding flat side of the body constitutes a cushion, though it has been found in practice that the lubricating oil with which the cylinder is kept charged, accumulates on the adjacent faces ofthe body and the wings in such a manner that it forms an etfective sound deadener for the closing movements of the wings.

In a twelve inch blower, the actual line of Contact between the circumferential wall of the cylinder and the periphery of the body of the piston will approximate one-sixtyfourth of an inch though to the eye the line of contact is very much in excess of the width mentioned. To produce a blower therefore which embraces as essential elements a cylinder and a circular piston, it has always been desirable that the latter shall have no peripheral groove or recess which is as wide as the line of contact heretofore mentioned otherwise the air can bypass from the receiving nozzle to the'discharging nozzle and as a result air and power is not only wasted but the blower operatesless etiiciently than it should because it. discharges the air with a pulsating instead of a continuous action. In my construction it will be understood that the provision ofthe body portion with inturned hooks and the wings with recesses into which said hooks fit snugly provides no peripheral recesses or grooves of the character menfor retioncd, that is to say, the recesses or grooves are represented by thin lines or joints of less width than the line of contact between the body of the piston and the circumferential portion of the cylinder. Because of this air cannot by-pass in a direction opposite to the rotation of the piston, from the receiving nozzle to the discharging nozzle each time one of the peripheral joints between a wing and hook coincides with thc point of the circumferential portion of the cylinder nearest the axis of the piston, whereas with all other blowers of the general type under consideration which have come under my observation, there is a by-pass action under the conditions named.

In practice each blower is equipped with an oil reservoir 32, a valve-controlled pipe 33 leading from the lower part of the reservoir to chamber 5 of the blower. The upper end of the reservoir is provided with an opening 34 communicating with the discharge nozzle of the blower and depending from the upper part of the blower is a pan. tltion 35, vso as to form an inclosed chamber 36 communicating with the lower part of the reservoir, and a surrounding chamber 37, which communicates with opening 34, chamber 37 being partitioned from the lower part of t-he reservoir by horizontal partition 38 connecting the lower end of partition 35 with the wall of the receptacle, and said bottom is provided with an opening 39 communicating with the lower art of the reservoir, 'said lower part being adapted to contain oil and having a. gage 40`to indicate at aglance the quantity of oil. The top of the reservoir is provided with a normally -closed oil feed opening 41, and an opening 42, through which the air discharged into the reservoir by the blower, escapes. to the escape pipe 43, ordinarily fitted in said opening 42Vand leading to a point where it is convenient to permit the air to escape into the atmosphere.

In practice, the operation of the blower etects a continuous circulation of the lubricant as well as the air as will be readily understood, it being obvious that the air and lubricant is discharged into the branched passage 37, and passes thence t. .wn through opening 39 into the lower part of the reservoir where the oil stands at the desired level, the air following the course indicated by the arrows and escaping upward through 20 the pipe 43 as will be readily understood.

It will be apparent of co1.'se that this blower or pump will operate as effectively with a liquid as with a fluid and may be employed for pumping Water or oil as well as air.

From the above description it will be apparent that I have produced a pump or blower possessing the features of advantage enumerated as desirable and I wish it to be understood that I reserve the right to make all changes properly falling within the spirit and scope of the appended claims.

I claim:

l. A rotary blower or pump comprising a cylindrical casing, provided with an inlet nozzle and an outlet nozzle, a rotary piston arranged eccentrically within the cylinder and consisting of a substantially rectangular body having at cach corner thereof, a p0rlion [')rojccting in the direction in which the piston turns and terminating in an inturncd hook forming in conjunction with the body a transversely extending cylindrical journal opening, thc peripheral portions of the hooks being struck from thc center of Ithe body and cachfhook adapten once in each revolution of thc latter, to engage the inner side of thc circumferential portion of the cylindcrwith an air-tight relation at the point olf the latterncarest the axis of the body, and wings having hinge portions fitting in thc journal openings and curved at their oncr or peripheral sidesand adapted once in' cach revolution to be forced inwardly :rgano-1l. the body and while in such position loi-in al their outer sides a continuation of tho pcriplicral surface of the adjacent, for warllly projecting portions ofthe body; said wings alA their hinged or heel ends having transvorfai recesses curving concentrically of llic axis ot thc adjacent journal openings of tlm body and snugly receiving the inturned hooks olf the latter.

A rotary blower or pump colnprising a "U cylindrical casing having a receiving nozzle and a discharge nozzle and formed in its periphery with outwardly swelled portions providing chambers communicating with4 said notches and with Vshaped bridges between said chamber and t-he chamber of the casing the inner faces of the bridges orming a part of the inner surface of the periphery of the casing and a rotary piston consisting of a substantially rectangular body and four peripheral wings therefor arranged at equal distances apart and when closed against the body constituting with the saine a circular piston the same being arranged eccentricall'y within the casing, the body at each corner having a forwardly projecting portion terminating 'in an inturned hook forming in conjunction with the body a transversely extending cylindrical journal opening, the peripheral portions of the.

hooks being struck from the center 'of' the body and cach adapted once in each revolution ot' the latter to engage the inner side of thc circumferential portion of the cylinder with an air-tight relation at the point of the latter nearest the axis of the body,

the said wings having hinge portions fitting in said journal openings and external recesses snugly receiving the inturned hooks of the body.

In testimony whereof I affix rnysignature, in the presence of two Witnesses.

l JOHN T. HOPE. Witnesses HELEN C. Rooonns, G. Y. Tnonrn.

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