US1927573A - Sand blast nozzle - Google Patents

Description

Sept. 19, 1933. w. B. OWENS 1,927,573

SAND BLAST NOZZLE Filed July 6, 1932 2 Sheets-Sheet 1 f K f 2/ J7 if 20 l J l 14 JNVENTUR WILLIHME UWENE JTTUEJVEYJi Patented Sept. 19, t

' William oweilsi an Monica, Calif.,' assignor Johin 'st lexsant Ma na,

: clone-halt to CaliL 1 pplicatio nj m i9 2'.' .i serial'j N6.1.s2 1,94s g 7' Qlaimss (cigar-1 1) This invention relatesto-improvementsin sand I' V a "'ofxwhich'atabout'the cententhere'is iormedan;

Op ing 11 forfithe reception 'ofja body; pal-1: 12;

blastnozzles.-1 a c,

An object of the invention is to provide fan-im.-; proved sand-blast nozzle a renewable or replaceable tip. Hereto'fore in the construction of sand ,blastno zzle sithe customary practice has been to providea" cap attachable to-the sand blast,

hose from which the nozzle proper projects. The nozzle properis usually in thexform of a single integratcasting, flanged. on'its exterior for-fre ception in the cap, and having abore therethrough the rear end of which is enlarged in a tapering manner so that the nozzlereceives the sand and causes it to.iss'ue uthrough the'fsmallest forward end 01' the bore. Ifind fromjexperience that the wide end of the bore in the nozzle'proper, is' not subjected to a severe cuttingaction by the sand but that the major portionof the' cutting action takes place in the small'or issuingend of the bore. When this small end becomes'badly cut, the entire nozzle'is usually junked and'replace'd; When these nozzles ,are .made of relatively hard, ex

pensive material, this .junking of the complete nozzle is: a considerable, item in sand blasting operations; a

An object of the present invention to provide a' construction consisting of atwo part nozzle, one part. forming the body which presents the tapering throat of relatively large'size and which is not subject to extreme wear. 3 The otherpart providesthe small. bore which is subject to ex'e treme wear but which can be easily replacedata minimum expense; The arrangement and design of the construction is such thatno shoulder is i presented in the passage .for the sandflwhich would hinder or tend-to obstruct the'movement of sand throughthe nozzle. ,When'the tip be comes. badly worn'it can be substituted ,for orreplaced quitev easily at aminimum expense;

With the foregoing and otherobjectsin' view,

which'will'be made manifest in thefollowing detailed description, and specifically pointed out sand blastnozzle; v V. Fig- 2' is a view in end elevation of thesame.

I Fig.8 isavertical section'illustrating a modi-V fled form of tip which may be. advantageou ly employed; .7 V

Fig. 4' s2. view in side elevation illustrating-a V 4 I 4 f3l,havinga:fiange 32; jThej bodytiparti3lyhasap modified form embodying the invention. I

1 Fig. 5 is a vertical section'throughjthe'nozzle proper illu'stratedin Figure 4. 6' is a sectional view taken upon the line Referring toithe accompanying drawings,

wherein similar reference characters designate similar parts throughout, the improved sand blast at relatively small bore 36 therein the rear end of ing; a relatively small bore 1 9*;-;thje rear end of 'or sides which meet the, shoulder lfix outwardly would hinderjthe flow-offsand.;.-j 'The-tip 18 maybe formed of anys itabl ma: 3

substance such as tool steel'or a'highly elasti c placed. 1 'findlthat by far the .ma orgportionbf wear. Consequently whennthe tip; becomes worn vrelatively inexpensive. The; oldgbodyfpart can steel, or a live rubber tip; Ithetipjrna'y, be ofr h struction the tip-is made ofia oompositionlrnown as Redman'ole which I find, to.,,l1 :YQ unusual =u're 3 1.0f,-a laminated str'uctureandfthe'blore at 19 v on Figure l j with the. exceptio nozzle comprises a cap or theend having-a flange 13, positioned ongth e; -inside of the a cap against a;suitablellg asket or washer 14;- which 1 prevents leakage. Thefib'odypart lz ha'sa ongig in tudinal opening extending therethroughgthe;rear g end otwhich presents forwardly converging walls {as indicated at 15.1'jThe'se walls arepre ferably smooth and curved as they taper ,iorwardly formf ing aitype of smooth throat-endingatgazshoulj p a der l6..'Forward1yfof shoulder; 16 the opening is enlarged and presentsga cylindrical interior sur; 3

face as at 17 for the reception of a' tipQlB hav-Q which is enlarged as at,2(j'with;tap rin walls 1,71 f

of the tapering Wells 7 15; on the; interior of body' part -12 so thatthe passage for the sand through 7 Q the nozzle does not have anysharp shoulderwhich 0 terial and ay be fformed 10, 5 an, extremely hard substance such as? relatively-soft rubber; I; thatsoit" live lrubber has-the faculty of resisting wfearto a great extentin adeviceof 1thi s .charg;

acter. .The tip 18: ishel dingplace asb'y a -thumb; screw. 21 and when it;be comes badlymorn the' a thumb ,scr'ew'can be loosened and'the tip- --re v the wear takes v place on; the interior of the; tip and thatthewalls 15 are'subjected toyveryllittle it need only be replaced with v a new-'t ip-. which isremain in use until quite a numberof rtips; have been worn out, D1SteadfOf;Ia;;haIdmetal-, tip 3 V which can ,be either high ,speed steeLgor tool character as shown; in :Eig'ure 3; 111- this i onwear resisting qualities. This tip as shown in 'Fige' H therethrough is of the-same shape-{ast hats o sired therforward 'end oftheabOreQ 'large'dzasjshown; -11

wInthe-form of .constructiondisclo se 4 ures* 4,- '5 and 6, there isylikewi'seia,bonnet; whichv i s :positiolned afiange'd 1nozzle' -l,'a'jody part

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