US822379A - Sand-blast apparatus. - Google Patents

Description

H. LUGKENBAGH.

SAND BLAST APPARATUS. APPLICATION FILED JUNE13, 1905.

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PATENTED JUNE 5, 1906.

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- UNITED srA rns- PATENT OFFICE.

HARRY LUCKENBACH, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR TO WILLIAM H. KELLY, OF SAN FRANCISCO, CALIFORNIA.

SAND-BLAST APPARATUS.

To aZZ whom it may concern.-

Be it known that I, HARRY LUCKENBAOH, a citizen of the United States, residing at San Francisco, in the county of San Francisco and State of California, have invented certain new and useful Improvements in Sand-Blast Apparatus, of which the following is a specification.

This invention relates to an improved sand-blast apparatus, the object of the invention being to provide an apparatus for cleaning buildings or removing iron-rust, paint, or the like which shall be cheap and simple in construction and convenient and effective in operation.

In the accompanying drawings, Figure 1 is a side elevation of the apparatus as a whole. Fig. 2 is a longitudinal section of the nozzle.

Referring to the drawings, 1 represents an air-com ressor delivering compressed air by a flexib e tube 2 to a coupling 3, connected to the rear end of a nozzle 4. Connected with a lateral opening 5 in said nozzle is an elbow 6, connected by a coupling 7 with a flexible tube 8, leading from a box 9 for containing sand.

Said nozzle 4 is formed with a conical seat or spout 10, into which is screwed a tip 11, the

form of which is of importance for the success-- ful operation of the invention. The opening therethrough includes a cylindrical rear aperture 12 of uniform diameter leading to a cylindrical front aperture 13, also of uniform diameter, but less than that of the aperture 12. The end of the aperture 12 next to the a erture 13 is square to said apertures. he length of the aperture 13 is substantially twice Compressed air discharging from such an aperture will form a narrow cylindrical jet not spreading to any considerable extent.

On the opposite side of the nozzle to the oppning 5 is an opening 17, connected b an e ow 18'With a flexible tube 19, leading om a vessel 20 containing water.

In the mouth of the nozzle is secured by a set screw 14 a Wearing-ring 15,-the aperture 16 of which converges from the rear to the front end, but at its narrowest point is much Wider than the aperture 13. The compressed air passing centrally through the aperture 1.6 in a narrow body sucks therewith sand pass ing down the tube 8. While the sand-box 9 Specification of Letters Patent.

Application filed June 13,

ishere shown as at a higher level than the nozzle 4, it has been found in practice that With a sullicient pressure the suction is sullicient to draw the sand. upward from a lower level. At the same time Water is sucked up through the tube 19, and the sand and water thus drawn into the nozzle are discharged together with the compressed air from the to clean rusty-iron, the sides of buildings, or other material for which a sand-blast a paratus is ordinarily used. The additiono the water serves to render the blast more efl'ective and also kee )8 down the dust.

The word. air in the claims is to be understood in the broad sense of any gaseous fluid, such as steam, which is the equivalent thereof for the objects of the apparatus.

I claim V 1. A sand-blast apparatus comprising a able Wearing-ring, and a tip discharging comressed air through said wearing-ring, said tip iiaving a discharge-hole of a length twice lts diameter, the surface of the metal ad acent to the rear "end of said hole being square to ing compressed air, a flexible conduit connecting said device with the rear end of said nozzle, a receptacle for sand, and a flexible pipe connecting said receptacle with the nozzle between the discharge-tip and wearingring, substantially as described.

2. In an apparatus of the character described, the combination of a nozzle having a discharge end, the inner surface of which converges to the end thereof, and having a t p for discharging compressed air through said discharge end, the length of the discharge-aperture'of said tip being substantially twice its diameter and the surface thereof immediately at the rear of said aperture being square to said a erture, means for furnishing compresse air, a flexible ipc connect ng said means with the rear on of said nozzle, a receptacle for sand, and a flexible pi 0 connecting said rece tacle with the nozz e between the tip and t e discharge end of the nozzle, substantially as described.

3. In an apparatus of the character described, the oombination of a nozzle having a discharge end, and having a tip for dischargnozzle having in its discharge end a removaperture 16 with great force and may be used the axis of said hole, a device forproviding compressed air through said discharge In witness whereof I have hereunto set my I end, meansforfurnishing compressed. air, a handrin'the presence of two subscribing wit- 1o flexibledpie coinnecgng said meaills fWith tlclle nesses.

rear en 0 sai noz e .a receptac e or san v v a receptacle for waterjand flexible pipes con HARRY LUOKENBAOH' necting said receptacles with thenozzle be- Witnesses: tween the tip and the discharge end of the FRANCIS M. WRIGHT,

nozzle, substantially as described, BESSIE GORFINKEL.

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