US1467488A - Sand-blast machine - Google Patents

Description

sept. 11,1923.

L. M USTE SAND BLAST MACHINE Filed Oct. 9. 1920 V/ y l.

Patented Sept. ll, 1923.y

narran stares rarest orFliCE,

SAND-BLAST MACHINE.

Application filed October 9, 1920. SerialA No.. 415,838.

To all lwhom t may con-cern Be it known that I, LEONARD MUSTE, a

citizen of the United States of America,

residing at Grand Rapids,in the county of Kent and State of Michigan, have invented certain new and useful Improvements in Sand-Blast Machines; and I do hereby declare the following to be a full, clear,`and exact description of the invention, such as will enable others skilled in the art to which it appertains tomake and use t-he same.

This invention relates to a sand blast construction for the projection of sand under air pressure against any surface to be finished by the abrasive action of the sand. It is a prim-ary object and purpose ofthe present invention to make a machine of this character and equip it with means for causing an eveny feed of 'sand to be acted upon by air pressure so that at all times the sand shall flow evenly from the machinel without plugging or stopping of the sand flow. 'A further object of the invention is to separate any water or oil from the sand or from the air going to the sand which causes the intermittent projection of wet oily sand from the machine, this being very undesirable yin sand blast machines. A still fur- -therobject of the invention is to provide means whereb-y the sand at the bottomy of the sand holdingreceptacle shall be acted upon directly by air pressure to force it from the receptacle into the air current, and at the same time cause the entire quantity of sand in said receptacle to be forced downwardly thereinl by air pressure. Many other objects and purposes, all tending to simplicity of structure, cheapness of constructionand repairv of the same, Vand ease .of obtaining parts for repair from regular stock carried by retailers of plumbing supplies, will appear fully as understanding of the invention is had from the following description, taken in connection with the accompanying drawing, in which, f y

Fig. 1 is a vertical section through the sand blast machine. v,

F ig. 2 is an enlarged vertical section through the oil and water separator, and

Fig. 3 is an enlarged vertical section illustrating the construction 4and connectiorrof the parts through which the sand passes from the holding receptacle tof the air pipe. Like reference characters refer to alike parts in the different figures of the drawing.

.coupling 18.

In thev construction, a sand holding receptacle is usedcomprising a cylindrical shell l of metal,`the upper end :of which lis vclosed-,by a top plate 2 while a bottom plate 3 is secured` below the ltop plate butga distance above the lower end ofthe shell, parts of the shell below the -bottom being out away to leave feetlforsupporting the :shell on the floor.l .The top plate 2has`a ange 5 secured4 thereto havingna threadedfopening through it for the entrance of a closingplugA 6. Sand .is entered linto the receptacle through the opening inthe flange, this opening-afterward being closed by the plug 6. The bottom, also has lan. opening Zmade through it and a flange 8 -is connected to the bottom atlsuch opening.` The flange 8 also has any opening ythrough .it into ,which a nipple y9-is screwed, connecting tol whichis an ordinary plug' valve casinglO, anplug valve llbeing rotatably ,mountedthere'in A second nipple 12,is-threaded into the` lower endcf. valve casing `10 anda T-.coupling 13 connected with the lower endrof the nipple. Arod la is kattached to .the valve 11 and extends outwardly beyondfthe wall of they shell ofthe receptacle, being turned upwardly to make a handle 15 for turning the valve from open to closed lposition and back.` n

yA section of pipe lpasses through one side ofthe shell 1 and anr air tight r'connection is made at ythepoint of passage by suitable locknuts 17 jas shown. .This pipe at its inner end screws'into `one end of` across An upwardly extendingpipe 19 threads into the crossrat its upper side anda similar pipe 2O into the lower side,

the former extending nearly to the top plate v2. "and ythe latter l'nearly to .the @Peiling 7 which a vertical sectionof pipe`24L connects,

it inturn beingconnected by a union 25 with a lsecond vertical pipe 26. Pipes 24 `and 26 parallel the. sideof the shell, and

pipe 26 at its lower end'is joined byl'an elbow 27 with oneend offa horizontal pipe28, the other endof which threads into one end ofthe T-coupling a` relatively long distance so as to pass bythe lower endv of the nipple 12,v ass-hown-inlfig. 3, pipe 29 threads i into the opposite end of the T 13 and extends outwardly a distance, having one end of a hose connectedl thereto.v The hose may be of any desired length and equipped at its end with the usual nozzle, they same as in all sand blast machines.

The air which is to pass through the pipes described is in many cases more or less impregnated' withV water and oil, the latter coming from the air-compressor. I have devised a novel separator for the oil and water vwhich is interposed in the air passage pipes between the air reservoir and the sand blastl machine. In the construction of the separator', a length of large pipe 31 is used and threaded at both ends to receive upper end lower closing caps 32 and 33. The air from the air compressor or air tank passesA intoV the compartment thus made through a pipe 34 threaded through the upper cap 32. Preferably, a shut-off valve 35 is placed in the entrancev pipe, indicated at 36, and the part 34 is a nipple connecting the valve with the cap 32. Vithin the separator, a cone 37 of metal is located at the upper end of a conical screen 38, the point ofthe cone coming directly below the lower end ofI nipple 34, andthe screen extending outwardly to thev bottom of the separator. Theoutlet pipey 39 from the separator xtends throughl the screen and into the lower ypipe 39.

portion of the cone 37, passing through the bottom cap 33 and having threaded connection with a second shut-off valve 40, from vthe lower end of which a nipple 41 extends and,c0nnects to the outer end of the section of pipe l'by means of an elbow 42. The separatorV lies alongside of the shell 1 near the upper end thereof and is braced by a bracket 43 to hold the same stationary. A gage 44 is. connected with the upper cap of the separator, and a drain cock 45 with the lower cap as shown. Y

. l/Vithin the sand containing receptacle, a funnel-like member 46 of sheet metal is placed, its` lower end coming around the opening, 7 inthe bottom 3, the sand being carried'down the sides of the member to the opening.

In operation, lthe air coming to the separator strikes against the point of cone 37 and isdirected outwardly against the inner sides 'of the wall 31and must come back through the screen 38 in order to 'pass out through Any oil ,or water in the air is screened therefrom and goes to the bottom ofthe separator where it may be drained offk through the cock 45. The air, freed of the oil and water passes from the separator and through pipe 16 to the cross 18, and thence upwardlythrough pipe 19 and down through pipe .20, this causing the sand to have-airy pressure "exerted upon it entirely over its upper surface, while the pressure of y air at the lower end of pipe 20 forces the sand through the opening 7, the nipples 9v and 12 and through the opening in valve 11 when turned to proper position. The excess of air passes out through pipe 21 and therefrom through the various connections to the T 13 passing from the end ofv pipe 28 and causing a suction on the sand which draws the sand into the air current as it passes outwardly through pipe 29 and hose 30. The pressure of air at the lower end of pipe 20 insures that the sand shall not clog or block in passing through opening 7 to the T 13 and stops the sand from packing in the bottom around and above opening 7 from pressure from above.

This construction of sand blast machine is effective and may be manufactured at low cost. All of the parts can be made with comparatively simple threading tools, except such parts as are always carried in stock in plumbing supply houses where they can be readily obtained. The control of the different valves are all at the same side of the machine, and easily accessible. Access to any part of the machine for repair is easy, practically any part liable to need any repair being on the outside and easily reached. Repair parts likelyto be `needed are found always in stock or can be obtained at any plumbing shop. The oil and water separator is simply constructed and may be cheaply manufactured. The stand is always free from accumulations of water or oil and dry sand is sure to be delivered from the Inachine'.. @logging or stopping of' the lsand from the sand containing receptacle is insured against. struction is practical and eiicient, and may be manufactured and marketedat low cost. The appended claims define the invention and I consider myself entitled to all formsof construction falling within their scope.

I claim:

1. In a construction of the character described, a container for sand having a botA tom with an outlet thereto, an air conduit pipe passing horizontally through the container between its upper and lower ends, a second pipe located substantially horizontally under the bottom of the container, a third pipe connecting one end of each of the first and second pipes, means located between and connecting the bottom'of the container with said second pipe, whereby sand in the container may be passed therefrom through the outlet to said second pipe, two oppositely extending vertical branch pipes connected with the rst pipe inside the container, one extending nearly to the upper side of the container, and the other to a point directly over said bottom outlet, and means for controlling the passage of sand from the container to said second pipe.

2. In a construction of the character described, a container for sand having a bot- In every respect the contom with an outlet thereto, an air conduit pipe passing transversely through the container between its upper and lower ends, a four-way coupling'interposed in the length of said pipe within the container, upper and lower branch pipes attached to said coupling, said upper pipe terminating near the upper end of the container and said lower pipe directly over the opening in the bottom 0f the container, a Vertical pipe con nected to one end of said rst pipe, a second horizontal pipe connected to the'lower end of the vertical pipe and passing under the container, conduit connections between said container and the second vhorizontal pipe for the passage of sand from the container through said bottom Opening to the second horizontal pipe, and means attached to the opposite end of the first pipe to filter the` air before its passage toy said pipe, substantially as described.

In testimony whereof I affix. my signa;

ture.

LEONARD MUSTE.

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