US2419228A - Nozzle - Google Patents

Description

April 22, 1947 A. s PITRE ETAL' NOZZLE Antonio dijz'tre, ,Fred G; C'owew 8e John Mfouyei JNVENTORS ATmR/VEY Patented Apr. 22, 1947 NOZZLE Antonio S. Pitre, United States Navy, and Fred G.

Cowen, Vallejo, and John Calif.

N. Pouget, Napa,

Application August 7, 1943, Serial No. 497,774

2 Claims. (01. 299-132) (Granted under the act of March 3, 1883, as amended April 30, 1928; 370 O. G. 757) This invention relates to a device for controlling fluid flow and more specifically, to a nozzle.

In general, it is an object of the invention to provide a device which is simple of construction,

2 which may be quickly and readily: manufactured of inexpensive common materials, which may be repaired by workmen at the place of operation and which may be used with ease, safety and economy.

- Another object of the invention is to provide a nozzle through which the size and shape of the stream may be controlled; to provide a nozzle which is adapted for use with heavy and/or be cleared of extraneous blocking objects almost immediately.

ther objects of this invention will, in part, be

. obvious and will, in part, appear hereinafter.

The invention accordingly comprises articles of manufacture possessin the features, properties and relation of elements that will be exemplified in the articles hereinafter described, the scope of theapplication of which will be indicated in the claims. a

For a better understanding of the invention, f; reference should be had to the following description taken in connection with the drawing, in which Fig. l is a side view in cross section, in the plane of the axis, of a device embodying one form of the invention;

' Fig. 2 is an end View of the device of Fig. 1, taken at a plane, the trace of which is shown at line 2-2 of Fig. 1;

Fig. 3 is an enlarged perspective view of the main block of the device shown in Fig. 1; and

Fig. 4 is a sectional plan view of the block a shown in Fig. 3, substantially on the line 4-4 of Fig. 1.

It is beneficial in a nozzle that the size of the delivering aperture be variablein order that the quantity, ofmaterial may be fixed at different desired amounts at different times, and in order that obstructions lodged in the nozzle may be removed by sending a sudden short spate of material therethrough.

When the nozzle is used with hot, heavy, viscous materials, it is advantageous if not necessary that the operative parts work in the presence of such materials. The nozzle of the present invention has such variability of aperture; it is particularly able in use with materials like hot plastic paints. Also, it gives a spray in a relatively thin sheet, having a rectangular cross section which is longer in one direction than in a direction perpendicular viscous fluids; and to provide a-nozzle-which may thereto. There is more paint in the middle of the long direction than at the ends. When a stripiof paint has been laid down on a surface in a direction perpendicular to the long direction of the spray cross section,this concentration ofp-aint permits a second strip to be laid down par- 1 allel to, and overlapping the end of the first strip without there being an excess of paint where the strips overlap. I In the drawing, l9 denotes a nozzle block whic is preferably a portion of a right circular cylinder. A passage l2 extends therethrough and may be axial. A casing l4, co-axial with said block, rotates upon it. A- movable gate element I6 is adapted to block and unblock the passage. Guides are provided to determine its path. They may be the walls of a dove-tail slot l8 in the forward end of the block l0 and in that event the gate [6 has a dove-tail cross section. There are suitable means for moving the gate I6. As shown, these take the form of a pin I9 which is slidable in a channel 20, which may be straight or arcuate, and disposed in the forward face of the gatelfi, and

which is. attached toa radially inward flange 2| on the casing 14. The flange 2| may be in'360 contact with the face of the block. a I

The casing has welded thereto gripping means, such as the handle 22. A locking element 24 in the handle is pressed by spring 26 into the circumferential groove 28, on the block I0, and prevents the casing from moving axially with respect to the block, and tends to hold the casing in any position at which it is set. The spring 26 may be retained by a screw 29. A set screw may take the place of element 24.

The receiving end of the block It may be threaded for attachment to a hose.

It will be seen that a motion transmitted from handle 22 to the casing causes the pin H to force the gate Hi to or from a position closing the passage i2. The gate may have a straight edge which, as it approaches a straight edge on the block, gives a dispensing slit which becomes progressively narrower. Spray from that slit is in the form of a narrow sheet, thelength of which is perpendicular to the length of the slit. The sheet'may be so sharp that no hand work is necessary to define any boundary of a paint area-0n the hull of a vessel, for example.

The side walls of the'dovetail slot l8, which are exposed by the sliding of the gate l6, act as guiding clams to the paint being delivered. The

, opening at the forward edges of those dams is v 3 made with the forward face of the block is approximately 60, see Fig. 4. The gate element 16 has a face almost in contact with face I! of the block. When the gate moves to open position, these faces separate. They are never in contact except at the forward edge, as each of these faces is out back about 3 away from a perpendicular to the front face of the block, as indicated in Fig. 1. Normally, when the nozzle is in use, it is a vertical slot. With the angles specified above, the material delivered comes to 'a focus at a 'distance in front of the block about equal to the width of the flange of the casing indicated in Fig. 1. The material forward of the focus fans out into a shallow horizontal band twelve inches wide at a plane eighteen inches ahead of the nozzle. More material is deliveredin the center of the fan than at the ends. This permits sue cessive vertical strips to overlap without an excess of paint along theoverlaps. The shape of the material delivered varies with angles mentionedabove. As'the gate is openedwider, the band of spray contracts horizontally and enlarges vertically until it becomes substantially a cylindrical stream.

The invention describedherein may be manufactured and used by or for the Government of the United States of America for governmental purposes without the payment of any royalties thereon ortheref or. c

What we claim as new and desire to secure by Letters Patent is:

1. A nozzle comprising a block having a passage; therethrough and a pair of opposite outwardly convergingsurfaces' constricting said passage, means providing a second pair of opposite outwardly converging surfaces constricting said passage and including a slidable gate member providing one of said second pair of surfaces, said gate member having angular side surfaces complementary to and engaging said first mentioned pair of outwardly converging surfaces and slidably guided thereby, said converging guide surfaces having linear outer edges in a lane perpendicular to the direction'of flow andcom stricting the flow through said passage when said gate member is in other than closed position, said gate member being slidable in substantially flush relationship with the face of the block and hav-V held so that the gate moves horizontally to give- 4 ing a straight edge cooperating with a straight edge of the block to provide a variable dispensing slit or opening, and means for sliding said slidable gate member in said block to adjust said dispensing slit to form a fan-shaped spray and to provide positive control of the length, breadth, and shape of said spray.

- 2. A nozzle comprising a block having a passage therethrough, and providing a pair of opposite outwardly converging surfaces constricting said passage and each being at an angle of about thirty degrees with the axis of said passage,

means providinga second pair of opposite outwardly converging surfaces constricting said passage and each being at an angle of about three'degrees with the axis of said passage, said means including a gate member slidably mounted in said blockand'providing one of said second pair of surfaces, said slidable gate member hav- REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 537,230 Pollman Apr. 9, 1895 1,276,245 Millard et a1. l Aug. 20, 1918 682,590 Greer Sept. 10, 1901 1,810,799 Temple June 16, 1931 502,742 McGowan Aug, 8, 1893 287,025 Herboth "Oct. 23,1883 352,732 Byrne Nov. 16, 1886 147,107 Dampman Feb. 3, 1874 FOREIGN PATENTS Number Country Date 591,343 French July 2, 1925 36,882 Swiss -Apr. 6,1906

Certificate of Correction Patent No. 2,419,228. April 22, 1947.

ANTONIO S. PITRE ET AL.

It is hereby certified that error appears in the above num correction as follows: In the drawing, Figure 3 should appear of as in the patentb'ered patent requiring as shown below instead and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

,Signed and sealed this 26th day of August, A. D. 1947.

LESLIE FRAZER,

First Assistant Oomnu'ssz'one'r of Patents.

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