US2392897A - Sandblast tool - Google Patents

Description

Jan. 15, 1946. c. E. ARCHER SAND BLAST TOOL Filed 00?. 30, 1943 Ziij. .3

I INVENTOR.

' KIMRLE$AR0HER Y E flfi)? v Patented Jan. 15, 1946 SANDBLAST TOOL Charles E. Archer, Birmingham, Mich., assignor to Ex-Cell-O Corporation, Detroit, Mich., a corporation of Michigan Application October 30,1943,SerialNo. 508,291

6 Claims. (cl; 51-11) This invention relates to a sand blast tool and is shown as an annular passage and receives one more particularly to a sand blast tool adapted to end of a'tubular member 20. be received in a bore having laterally extending "The one end of the tubular member 23 is propassages and to provide a lateral discharge nozzle vided with an annular flange 22 which is received for directing the blast into the laterally extending against the outer surface of the headerlil and passages of the bore. is' held in rotatable position thereon by a collar .Heretofore, it has been the general practice in 24 having screw thread engagement withtheend sand blasting comparatively small, cored passages, of the header 10. The tubular member 29 is proand particularly tortuous passages, to divert the jectedlongitudinally beyond the end 'of' the blastof sand by a correspondinglyshaped pasl0 header [land is adapted to be inserted in a lonsage in the sand blast tool causing the sand to imgitudinally extending bore 26 of a workpiece 28, pinge on the wall of the sand blast conduit. This such as a cored casting having transversely ex-t causes a rapid wearing away of the tool conduit t ndin 'p ages 30. I and repeated replacement. When it is desired to remove core sand, scale It is, therefore, an object of this invention to or the like from passages extending at an angle provide a sand blast nozzle having a fluid pressure to another passage through which the sand blast conduit which delivers the pressure through a tool is inserted, it is necessary to conduct the tortuous passage before the sand is mixedwith b ast, first n a direction corresponding to th the fluid pressure so that there is no diversion direction of the first p ss and then divert e of sand under pressure. direction of blast so that it is directed into the Another object ofthe invention is to provide a lateral passages. Heretofore, this has been done header member having a fluid pressure chamber by di ti t e St e O mixed fluid p s e and a sand chamber with separate passages exand sand in a tortuous path. This causes an tending longitudinally throughamember adapted abrasive action on the diverting wall with the to be received in a cored opening and havin a result that the parts of the passages are quickly laterally extending discharge passage for the fluid worn and must be rep pressure communicating with the longitudinally y y improved construction I maintain a extending sand passage. separation of fluid pressure and sand until the A further object of the invention is to provide fluid pressure has been diverted into the required a header having a fluid pressure chamber and a 30 direction after which the sand is admitted to the separated sand chamber and a rotatable, tubular fluid Pressure Thus the Sand flees not member provided with separate passages c mimpinge on the walls of the conducting conduits. municating respectively with the fluid pressure The end of the tubular member 26 adjacent chamber and the sand chamber. the header I0 is provided with an annular sand Other objects and advantages of the invention passage 32 surrounding t e p it which rms will be more fully understood from the following a'fluid pr ss e pass A member i a description taken in connection with the accoming a y n l Outer end r n substantially panying drawing in which; the diameter of the passage 32, has one side there- Fig. 1 is a longitudinal sectional view through of cut away diagonal. e fo ing a flat my improved sand blast tool Showing the Same 40 face 38 for directing the sand in the passage to ceived in a cored passage having laterally extendga i i gg g gpz gifg g i fig 2 3 5"; 222

ing passages; n er 36 to receive the outer end of the fluid pressure fi 2 is a plan new of the tool Shown in pipe IS; A passage 42 is formed in the member Fig 3 is a sectional View ke 3 3 f 45 36 for conducting the sand therethrough.

Fig a n on me 0 At the outer end of the tubular member 20 is a Y nozzle fitting 44 which has screw-thread engage- Refemng the drawmg the 9001 001101011588 ment with the tubular member 2a. This nozzle a header ha a Central d pi e Cham- 44 is of a dimension substantially equal to the her I 2 and a Sandchamber l4- A Pipe 1S fitted 50 diameter of the tubular member 20 and both are into a wall It! which separates the two chambers of minimum size so that the tool may be easily l2 and I4 forminga conduit from the fluid presinserted into openings of comparatively small sure chamber l2 through the sand chamber I 4. dimension. Both the pipe I 6 and sand chamber I 4 are 00- The nozzle 44 is provided with two axially exa i The di harge end of the sand chamber 14 tending passages 46 and 48 which register with.

the passages 34 and 42 respectively. A transverse pas age 50 opening through one side of the nozzle intersects the passages 46 and 48. A replaceable wear member 52 is fitted in the open end of the passage 50. By this arrangement of parts the sand is fed by gravity into the passage 50 where it is picked up by the diverted fluid pressure Withing 50 of the nozzle 44 may beqrotated to apply a sand blast to all portions of passages 30'. The collar 52 also serves as a stop to limit the depth at which the nozzle is insertedinthe bore 26;

municating with a longitudinally extending passage in said nozzle registering with the open end of said delivery pipe and communicating with a longitudinally extending passage between said last mentioned longitudinally extending passage and said discharge opening, and registering with the open end of the passage between said tubular member and said pipe. I I l 3; A sand blast tool comprising a header havinga fluid pressure receiving chamber and a sand receiving chamber, a fluid pressure delivery pipe communicating with said pressure chamber and p projecting beyond the end of said header, a tubu- The compact arrangement of parts makes possi- V ble a sand blast tool of minimum dimension so" that it, may be inserted in small passages and by mixing the sand withthe'fluid, pressure after the; fluid pressure hastbeen diverted fromits path longitudinally; of the tool, wearing of the: tool parts, heretofore caused by impingement of sand at high velocity against a diverting member,, has been .eliminated-.. I 1 i It: will be understood; that various: changes: including the size, shape and arrangementv of parts may; bemade without/departing: from the spirit of my invention and it is myintention to. cover, by the appended claims, such-changesv as may be reasonably included within the scope thereof. 7

I claim as my invention: I I

l. A sand blast tools comprising; a-header; having a fluid pressurereceiving chamber and-asand receiving chamber,, a: fluid pressure deliverypipe communicatingwith: said pressure chamber and projecting beyondthe'end of said header,,a;tubulap-member connected to'saidheader surrounding said pipe and communicating with said: sand chamber to form a-, sand. passage between: said tubular-member andsaid pipe,- and a: nozzle having a diameter substantially ec uaLtothe: diam:- eter. of said tubular membendetacha'bly received at the outer end of said tubular member-and having a side discharge:openingydirected substantially at right angles-tmtherdirectiOIr-Df; said pipe and tubular member; said: side; discharge,

opening communicating withaa longitudinally ex?- tending passage in said nozzle, registering with the open end of said deliverypip andi commitnicating with; a. longitudinally extending. passage registering with the; open. end; ofrthei passage be tween said tubular member? and: saidi pipe: and located between; the discharge openingandzisaid fluidpressure deliveryipipei r 2; A sandblast tool;comprising;aiheaderihaving a fluid pressure receiving chamber and: Z5 sand receiving chamber, afluidbpressurel delivery p'rp communicating with said: pressure chamb er: and projecting beyond the; endz on-said: headen. (a tubular member connected: to said header surrounding saidwpipe and. comunicat-ing with said sand chamber to form a.sandipassageaibetween said tubul'armember andsaid pipeyrmeans'iaccessible to the operator for rotating saiditubular member relative to said header when saidvnozzle is within a workpiece; and a-snozzlethaving aidiameter substantially. equal. to; the; diameter: of'

said tubular member. detachablyreceived? ati tlie outer end i of said. tubular: member andi having a side discharge opening directed substantially" at right angles. to the direction or: saidszpiperand tubularmember, said sidedischargeopeningwcm lar member connected to said header surrounding said pipe and communicating with said sand chamber to form a sand passage between said I tubular member and said pipe, said tubular memberbeing": rotatable relative to said header, a nozzle having a diameter substantially equal to the diameter of said tubular member detachably received attire? outer endoi saidtu-bular. member and having; a. side:'discharge opening directed substantially atright: angles to the direction of said pipe and tubular member, said discharge opening; communicating with: a longitudinally extending passage in said nozzle: registeringywit-h the: open endof said: delivery ipe and connecting with; a longitudinally extending passage registering with: the-open endoftherpassa'ge-between said tubular member and said pipe, and a longitudi naily adjustable: sleeve on the outer periphery of said: tubular member for'engagement withatlie' work to variably position: the: nozzle within the work. 7

4;. A sandblast tool: comprising a header having;a fluid. pressurereceivingzchainber'and-"a sand receiving: chamber, a delivery pipe: communicatr ing; with said pressure; chamber and". projecting beyond the end of said header, a. tubular member connected to said header surrounding: said pipe and; communicating with. said: sand chamber to form a: sand passage. between said tubular mem her and said pipe; at: membenwithin said tubular member having: one sidecut away forming- 's; fiat-z diagonal: surface: for directingsand: around said: pipe: to one: side: adj ace'nt the outer end oi said tubular member? and having spac'ze'd openings therethrough, one to'communica'te w the opening inzsaidj pipe: and forming a support for saidipipe rand: theothen forming acommunicatibn with thezsand passag'esat' one" side of said tubular member; and a nozzle havingan: outside dimer-i sion: substantially equal to the diameter of said tubular member andzhavingaside-discharge pas= sage; intersecting: the: spaced: openings in I said member withinisaidi tubular member;

5: A' sand blast toolcomprising aheader having a fluid pressure receiving chamber and a sent! receiving chamber; separatedcoaxial Y passages extending: substantially.- paralleffromisaid headei andcommunicating; respectively with said pres sure chamber and said sand chamber; and" a nozzlehaving a: fluid: pressure passage; and" a sand passage communicating respectively with said parallel passages and forming. straight line continuations thereof, said fluid pressure passage having a discharge opening extendingins a-direction'at an angle. to saidparallel' passages and intersecting said sand passage; at right angles thereto adjacent the discharge opening;

6. A' sandbla'st-tool comprising a headerl'iaving a: fluid pressure receiving chamber and a sand receiving chamber, a nuid -pressui-e ceiivery' pipe communicating with said pressure chamber-1 and projecting. beyond the end o'f=- said header; 8;

passage, and having a longitudinal passage communicating with said sand passage and intersect ing said lateral discharge passage at a point between said fiuid passage and the discharge end 5 of said lateral discharge passage.

CHARLES E. ARCHER.

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