US 2543517 A
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Description (OCR text may contain errors)
Feb. 27, 1951 W, E, ANDERSON 2,543,517
APPARATUS FOR COMBINING AND EMPLACING CEMENTITIOUS SUBSTANCES Filed June 9, 1947 ATTORN EY.
Patented Feb. 27, 1951 APPARATUS FOR COMBINING AND EMPLAC- ING CEMENTITIOUS SUBSTANCES William Elmer Anderson, Kansas City, M0., as-
signor to Jo Zach Miller III, Kansas City, M0.
Application .I une 9, 1947, Serial No. 753,430
1 Claim. 1
This invention relates to the art of aiixing cementitious substances to surfaces and the primary object is to provide a specially formed nozzle forming a part of the apparatus for producing and emplacing the cementitious substance.
The most important object of this invention is to provide a nozzle for apparatus of the aforementioned character, which nozzle is formed to present an intake port for air and water, the air serving not only to draw sand and cement into the nozzle but to atomize the water prior to entrance thereof into the nozzle for impinging upon and rendering such materials plastic and of proper consistency.
Another important object of this invention is the provision of a nozzle for said apparatus having a continuous bore therethrough, provided with a single inlet port circumscribing the bore for receiving both air for drawing the material into the nozzle and the atomized water, said Water being introduced to the air at a point remote from the nozzle to the end that the mass of material is hydrated only with a pressurized spray of moisture and improper admixing is thereby avoided.
Another object of this invention is to provide a nozzle of the character above set forth having parts forming a portion of the bore thereof for receiving the hydrated mixture constructed to avoid clogging of the nozzle during use, through the medium of novel formation of said parts as well as the material from which said parts are made.
A further object of this invention is to provide a nozzle assembly having a cylindrical body provided with a tubular insert adjustably mounted to vary the extent of vacuum created in the body.
A still further object of this invention is the provision of a nozzle formed to direct the material tangentially thereinto and having a sliding tubular member movable to selected positions With respect to the incoming material whereby greater vacuum may be established as the weight and size of the particles of material is varied.
Other objects will be made clear or become apparent during the course of the following specification, reference being had to the accompanying drawings, wherein:
Fig. 1 is a schematic view of a portion of apparatus for emplacing cementitious substances having a nozzle therein that is made in accordance with the present invention.
Fig. 2 is a fragmentary enlarged longitudinal condensed central sectional view through the nozzle of the apparatus.
Fig. 3 is a fragmentary longitudinal cross sectional view through a modified form of nozzle; and
Fig. 4 is a detailed sectional view through the main shut off valve shown in Fig. 3.
This application is related to Patents No. 2,231,489, dated February 11, 1941, No. 2,264,108, dated November 25, 1941, and No. 2,303,810, dated December l, 1942.
The nozzle illustrated in Patent No. 2,231,489 has been found unsatisfactory in that compressed air is injected into the body portion thereof at a point spaced from the water inlet, resulting in the dry ingredients being forced into a stream of incoming water. The device shown in that patent when placed in use failed to provide adequate hydration since the water was not properly atomized within the nozzle, thus causing clogging due to unsaturated lumps forming therein. Further, clogging was found to be caused because of the provision of a second annular cavity presenting a space `for coilection of the cementitious material. And, nally the section of the nozzle receiving the substance as it passed outwardly as formed, became quickly damaged by the sand and gravel beyond use, necessitating frequent replacement.
The nozzle illustrated in Figs. 1 and 2 of the drawing accompanying this application has been found more satisfactory and comprises a pair of sections l0 and l2, the ends of which are in opposed, spaced apart relation and held in such position by a coupling lll. Coupling ifi bridges the space between the sections Iii and I2 and is provided with an annular cavity IS formed in the inner face thereof which circumscribes the section iii. Sections l@ and i2 are tubular to present a continuous longitudinal bore through the nozzle.
Section I9 constitutes a pair of parts i8 and 20, said parts being threadably interconnected as at 22 and part 20 extending into one end of coupling I4 to terminate in spaced relation to the opposite end of coupling Ill. A laterally eX- tending external annular flange 24 integral with part 20 is disposed exteriorly of coupling i4 and joined to the proximal end of coupling i4 by a number of machine bolts or the like 2t.
Part I8 is relatively short and receives one end of a ilexible hose 23 leading to a material feeder 30. The outermost free end of part I8, which forms one end of the nozzle, has its innermost face beveled outwardly as the outermost end thereof is approached as at 32 to the end that material entering the nozzle has no tendency to collect at this point and cause clogging of the nozzle.
The end of the part of section I0 adjacent to the inner end of the section I2 is reduced to substantially a feather edge by tapering a portion of the length of said part 20 to produce a frusto-conical portion, the outer surface 34 of which cooperates with the inner surface of coupling |4 in directing compressed air and atomized liquid unto the section I2.
The coupling I4 is provided with an enlarged cavity for receiving the section I2 and presenting an internal annular shoulder 42. Section I2 includes a metallic sleeve 44 encircling a iiexible, tubular member 46 of rubber or the like. Member 46 extends outwardly beyond each end of the sleeve 44 and overlaps the outer surface of the innermost end of sleeve 44 to present a circumscribing portion 48. This overlapped portion 48 of member 46 is held in tight abutting relation with shoulder 42 by a lateral annular flange 50 integral with sleeve 44. This flange is secured to the proximal end of the coupling I4 by machine bolts or the like 52, and the inner face of sleeve 44 is beveled outwardly as at 54 adjacent the inner end thereof to the end that an enlarged inlet opening is presented in section I2 to receive material from section I0.
A tube 56 places annular' cavity I0 in communication With a source of compressed air (not shown), such as a tank illustrated in the aforesaid patents. This tube includes a hollow nipple 58 and has a valve 60 interposed therein for controlling the passage of air to the nozzle.
A tube 62 having connection with a source of water (not shown) has a control valve 54 and a pipe 66 that connects with and extends into nipple 58 at a point remote from the nozzle and the cavity I6 thereof. rhat portion of pipe 66 within nipple 58 constitutes a coupling 68 for having an extension l0 of reduced diameter provided with an outlet port I2 disposed to direct water in the direction of flow of air currents in nipple 58 toward cavity IB in the coupling I4.
It is easily understood from the foregoing that water or other liquid will enter nipple 58 from tube 62, through valve 04, coupling |58 and portion I0 thereof and be introduced into the stream of air in a fine jet. This liquid will be atomized as the same is forced into the cavity IS and thence into section I2 where the same will admix with materials thereby effected without danger of clogging of the nozzle since the liquid never passes to the material in bulk and thereby causing the material to lump prior to passage from the nozzle.
It is notable further that at no point within the longitudinal bore through the nozzle is there restrictive surfaces tending to cause clogging. The member 4E will withstand many more hours of use before the sand and gravel of the mixture damage the same beyond emcient use. Removal of bolts 52 provides quick and easy replacement of member 46 when such becomes necessary.
The amount of air and water, and thus the amount of material drawn into the nozzle may be selected through the provision of a number of metallic rings i4 interposed between iiange 24 of part 20 and the proximal end of coupling I4. The number of these rings I4 utilized determines the size of the passage 38 between surfaces 34 and 36 of part 20 and coupling I4 respectively.
The nozzle shown in Figs. 3 and 4 includes a body |00 of cylindrical form and made from a single piece of material to present a longitudinal bore |02 rather than sectional as in the form shown in Figs. 1 and 2.
A hose |04 comparable to hose 28 shown in Fig. l directs the material into the body |00 through connection with a coupling |06. This coupling |06 connects with an inlet opening |08 formed in body |00 intermediate the ends thereof and is disposed at an angle with the body |00. Thus, instead of projecting the material coaxially into the body |00 as is true with the connector I8, this coupling |05 causes the material to flow into body |00 tangentially to its longitudinal axis.
Ahose I0 comparable to hose 56 and a hose I I2 which is like hose 62 of Fig. l, directs compressed air and water respectively into body |00. Air and water pass through a main control valve I4, while the air is separately controlled by a conventional shut-o valve,` I6 interposed between hose ||2 and valve ||4.
Fig, 4 illustrates the form of valve I4. A core ||8 is rotatably mounted within the housing of valve E I4 and actuated manually by a handle |20. This core ||8 has an opening |22 therethrough for permitting passage of air from hose ||0 to body |00 when core II8 is turned to the position shown in Fig. 4. Core ||8 is also provided with a port |24 communicating at one end with the opening I I8 and at its opposite end with a nipple 22E when core i8 is disposed as shown in Fig. 4. The nipple |2 is threaded into the housing of valve H4 and receives valve I6 at its outermost end.
It is clear that turning of core ||8 by manipulating handle |20 will prevent passage of air or water into body |00 even if valve IIB remains open. Thus only one action on the part of the operator in controlling the operation of the nozzle and valve IIS may be set to permit passage of a selected amount of water without readjustment during each shut-on operation.
The predetermined admixture of air and water is directed into one end of the body |00 by a. plug |20 interposed between valve |I4 and body |00. This mixture then passes through a tubular member |30 slidably mounted in body |00. The member |30 has an outside diameter at one end thereof adjacent to the plug |28 substantially the same as the diameter of bore |02. A set screw |32 releasably holds member |30 in any selected position within body |00 with respect to material-,
inlet opening |08.
The outlet end of body |00 opposite to plug |28 is externally threaded to receive a relatively short steel pipe section |34 or use in Sandblasting. The length of pipe |34 will govern the extent of spray of material passing from the nozzle. In the event lighter material is to be emplaced, l. e. when the nozzle is to be used for the same purpose as the nozzle shown in Fig. 2, then a short hose of rubber or other exible material is slipped over the outlet end of body |00.
The slidable, tubular member |30 is shown in Fig. 3 positioned to create a maximum amount of vacuum within body |00. As member |30 is moved toward the plug |28, the extent of vacuum in body |00 is decreased and the nozzle is then adaptable for use with lighter material passing through hose |04.
The use of the nozzle shown in Fig. 3 has the advantage over that shown in Fig. 2 of being adaptable to handle heavy material used particularly in Sandblasting. The pressure necessary to draw such heavy material into the nozzle is made 5 possible by use of this modified form whereas the REFERENCES CTED nozzle of Flg 2 1s not so adaptable' The following references are of record in the Having thus described the invention, what is claimed as new and desired to be secured by Letme of th;;'STATES PATENTS ters Patent is: 5
In a, nozzle, a tubular body 'adapted for pas- Number Name Date sage of material therethrough and having an dn- Re, 16,539 Hamm Feb. 1, 1927 nular inturned ange formed therein; an elon- 1,124,579 Ambursen Jan 12, 1915 gated sleeve; a rubber tube extending through 1,153,132 Pettitt sept. '7, 1915 the sleeve, said tube being rebent upon itself at 10 1,239,233 McKim et a1, Sept, 4, 1917 one end thereof in partial overlapping relation- 1,658,080 Mack May 1, 1923 ship to the outermost face of the sleeve at the 1,935,977 Geer Nov. 21, 1933 proximal end of the latter; and means for hold- 2,231,489 Anderson et a1 Feb, 11, 1941 ing a portion of the sleeve and the tube within the body with said rebent end of the tube bear- 15 ing against said ange.
WILLIAM ELMER ANDERSON.