US1053677A - Pump. - Google Patents

Description

W. S. SUTTON.

.PUMP.

Patented Feb. 18, 1918.

UNITED STATES PATENT OFFICE.

WILLIAM s. so'r'rotu, or ROCKFORD, ILLINOIS, ASSIGNOR TO AMERICAN RADIATOR COMPANY, OF CHICAGO. ILLINOIS. A CORPORATION OF NEW JERSEY.

PUMP. v

To all whom-itpiay-coacem Be it known that I', WILLLUfSf'SUTTON,

a citizen of'ithe United States, residing at Rockford, in; 'thef-"eounty of Winnebago,

State of -Illinois; have invented certain new and useful fl-lmpr oyements m Pumps, of

' whichthe'following isa specification.

3 M'y invention relates in general .to' pumps,

, v but lnorevparticularly to'airpumpsused n j-yacuunr cleaning apparatus? where. the air lfdrawn in pump-r 4-. i

' The-inventionj'is', particularlydirected to within a ca'sing'likeiatwo tooth gear-to propasses through the air pump and if there are; 1 ahy'forkaignsubstances ofany body drawn 1 reaching the air pump, considerable-injury isdone tattle-impellers, or other-parts of thevpum 'v T a. One othe objects of my inventionis tow surfacethe impellers used in air pumps w th a soft metal, such a s'-lead,"to lessen vibration to the 'appar atusv-passes through the the impellers erbladesof the pump.

,- In, an. air pump of well-known construc tion" there areftwo, impellers which revolve an'd continuous suction. lonot touch each other at dime. a Qijiositiv'e' These impellers,

any'point but their adjustment has. to be extremely-fine The dust-laden'airdrawn into the pipes of the vacuum apparatus into the Iapparatu'sand not removed before and-to provide-a surface 'that may be easily machined,-1-but I'ha'\ 'e"found that Where the surfaces of, both impellers a re"for1 ned ..of meta-l of;thesame-degreeof hardnessl t re;

sults'f -iif lthe stripping; or tearing of such meta'1- from theimpellersWhen some foreign substance drawn through thepipes is caught betweenjthemj' This is due to the fact that;

the two'metals' are ofthe same degree of hardness and the foreign substance will first tear a piece of metal from one impeller which willginjurethe other impeller, resulting in therolling up" of-a ball or stripof:

metal, a ortion; of which isv collected from each impeller and thustnot onlydestroymg the efficiency of the machine, but frequently resulting in its breaking. I

It is-to overcome this disadvantage toimpellers-: composed of material of the same hardness that my invention is further dirooted. It is also desirable to surface the impellers-with material that will not rust, since water is frequently introduced into the pump and by using a soft metal, or a metal Specification of Letterslatent, lh tcnied Feb Application filed March 7, 1912. Serial No 2240.

- at least softer than the core of the impellers, the noise from the operation of the pump is considerably lessened.

is a top view of my improved pump with the [casing broken away: Fig. 2 is a section on the line 2-2 of Fig. l.

inferring now more particularly to the drawing, the pump consists ofa casing 3 having an inlet. port 4 and an outlet port Mounted within the casing are shafts 6 and '7 having suitable hearings 8 and upon which are keyed the impellers 9' and 10. A gear ll is 'mou'nted upon each shaft, and said gears arein' mesh so that both shafts may be driven by a single drive-shaft 12.

in the'accompanying drawing, Figure l" I'claim nothing new in the general pump constructionsince it is the'connnon form of rotarypump of the cycloidal type in which the impellers 9 and 10 revolve like a twotooth gear withingthe casing 3 producing a epositive'and' continuous suction at the intake opening 4.

I, v Que feature of my invention resides in the construction of the impellers, the body pored or otherwise secured the surface material of different degress of hardness.

-VVhere the surfaces of the two impellers "are composed of soft metal of the same degree of hardness; a foreignsubstance with any body whatsoever, after being partially embedded in one impeller, will injure the t) and 10, which are composed of metals '80 tions of which are made of cast iron orany other suitable material, over which is moldsurface of theother impeller and if the maistics, and while I do not limit myself to any particular material, I preferably surface one impeller with common Babbitt metal and the other impeller with type metal, preferably of low grade, both of which substances have b 7 low elastic eglualities and are of different degrees of bar ness, and neither of these metals will rust. The result of such a construction 1( is this: that when a foreign substance with any body is caught between the impellers, the foreign substance will be either embedded in the surface of theimpeller having the softer material thereon and such foreign substance Will either remain in the surface of the impeller 0r be throWn therefrom, but in no, event Will material from one impeller be transferred and adhere to the other oneand thus pass back and forth particles of metal so as to result in the stripping-or ribboning of the metal surfaces from either or both impellers. p

I do not Wish it to be understood that I am limited to the particular metals herein designated; since it is obvious that other metals might be used having substantially the same characteristics Without departing from" the spirit of myinven'tion, nor am I limited to the particular means for 00313111};

the impellers, such as by molding the surface metals thereon, and,

Therefore, Without confining inyself to the details herein specified, I claim:

1. A pump having impellers the air impelling surfaces of which are composed of metal of 10W elastic characteristics and of diiferent degrees of hardness. i

' 2. A pump having impellers, the air impelling surfaces of Which are composed of metallow in elastic characteristicsand'unequally yieldable to the same pressure.

WVILLIAM S. SUTTON.

VVit-nesses:

l 'ROBERT LATHROI,

LoUIsn LAWRENCE.

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