US1328721A - Spray-gun - Google Patents

Description

F. E. CRUMMEY.

SPRAY GUN.

APPLICATION FILED Nov.26. 1918.

1,328,721. v Patented Jan. 20, 1920.

IN V EN TOR A VZzzz/vu'nf 72111 um flm red;

A TTORNE YS TJFTTTED STATES PATENT OFFICE.

FREDERTCK EDMUND CRUMMEY, OF SAN JOSE, CALIFORNIA, ASSIGNOR TO BEAN SPRAY PUMP 00., OF SAN JOSE, CALIFORNIA, A CORPORATIUN OF GALIFORNIA.

SPRAY-GUN.

Specification of Letters IPatent. Patented J an. 20, 1920.

Application filed November 26, 1918. Serial No. 264,284.

To all whom it may concern:

Be it known that T, FREDERICK EDMUND.

= for conveniently controlling the nozzle head,

and at the other end is provided with a nozzle head for forming the spray, regulating its quality, volume and projection, and gradually converting it as projected, into a relatively solid stream of spray.

The object of my invention is to provide a simple, effective and durable device of this type, in which the discharge may be ac curately regulated to all variations between a fine spray fog or cloud of low velocity,

' projection and volume to a relatively solid stream'o'f spray of high velocity, maximum projection and greatest volume.

To this end my invention consists in the novel spray-gun or spray-rod which I shall now fully describe, by reference to the accompanying drawings, wherein is shown more particularly that form of the device usually termed a spray-gun, in that the noz zle head is alined with the pipe, though it is to be understood that said head may be applied to the pipe at an angle and its valve operated by exterior connections as is common in the spray-rod type.

Figure 1 is an elevation, broken, of the gun, portions being in section.

Fig. 2 is an elevation, broken, the spray or nozzle head being in more complete section to show the ports on the opposite side of the valve-seat-sleeve, and. their control by the piston-valve.

1 is a pipe, having at one end the inlet connection 2 from a suitable source of spraying liquid or solution, supplied, as

,usual, under pressure.

Fitted to the other end of the pipe is the spray. or nozzle head. This comprises the valve-head-shell 3, in which is confined the removable valve-seat-sleeve 4:, the latter being held by the pressure of the discharge cap 5 screwed upon the end of the shell 3. This cap carries an internal metallic washer t3, and a resilient gasket 7, the cap, washer and gasket being provided with a discharge opening 8. As the outer end of the sleeve 4: is flush with the end of the shell, the gasket 7 bears on both said ends with uniform pressure and makes a tightjoint. The pressure on the sleeve d holds the latter within the shell 3; and the sleeve is thus practically a part of the shell, though it may be removed therefrom.

In the wall of the valve-seat-sleeve a are formed two port slots 9. These are inclined to the axis of the sleeve, at substantiallyjthe same angle and are oppositely located.

In the wall of the sleeve 4t are two other port slots 10. These are oppositely located and lie between the port slots 9. They are wider than the port slots 9, so that their capacity with respect to width is greater than the capacity of said slots 9. Also said slots 10 terminate attheir outer ends at a greater distance from the outer end of the sleeve than do the slots 9; and, finally said slots 10 are angularly disposed with relation to the slots 9, and may lie either in the line of the axis or the sleeve or on either side thereof preferably, as here shown, inclined- Extending through the pipe 1 is the valve rod 11, having at its lower end a handle 12. At its other end it carries the piston valve 13, which is adapted for reciprocative movement within the sleeve 4 in order to control the port slots thereof.

Reciprocation may be imparted to the valve 13 by any suitable means. For illustration, I have here shown these means as comprising a cam-slot 14: in the shank 15 of the handle 12, playing over a fixed stud 16 in a journal 16 on which the handle 12 is rotatably mounted, so that by moving the handle on its axis, it and the rod will be moved longitudinally, thereby reciprocating the valve 13.

The discharge hole 8 of the cap assemblage is adapted to be fully closed by the valve 13, coming to a tight seat againstthe cap gasket 7.

The operation of the device is as fol lows:-- t

When the plston valve 13 1s pro1ected to fit tightly against the gasket 7, no liquid can' be discharged. By retracting the valve, due to the turning of the handle 12 as heretofore described, said valve immediately opens the discharge hole 8 in the cap assemblage, and then uncovers the outer extremities of the port slots 9. As the piston valve 15 has a thickness less than the length of the slots 9, liquid communication is now established from the interior ofthe sleeve t behind the valve, into the slots 9, and along said slots acting as port passages, to their uncovered forward ends, thence inwardly through said ends into the sleeve forward of the valve and thence through the discharge hole 8. The inclination of theseport slots 9 gives whirling motion to the liquid which converts it into a spray, the quality and velocity of which depends on the extent to which the slots are uncovered.

As the retraction 01 the valve is increased the volume and velocity and consequent projection of the spray is increased, until the valve begins to uncover the forward ends of the port slots 10. These slots being angularly disposed relatively to the slots 9, tend in thus opening up their through communication to counteract the whirling due to the slots 9, and as they have a greater width than said slots 9, it follows that, in proportion to the amount of retraction of the valve and the increasing degree of exposure, this tendency will increase, at the same time that the volume and velocity of the passing liquid increases; wherefore the discharging liquid gradually changes from one limit as a spray, small in volume and projection, to the other limit as a stream of spray of large volume and maximum projection. Between these limits lies any effect desired.

It should be pointed out that the sleeve l with its port slots 9 and 10 might bean integral part of the wall of the shell 8, but in the best construction, to provide compensation for wear this portion is made as a separate sleeve, in order that it may be readily removed and replaced or another substituted. This is easily effected by simply unscrewing the discharge cap 5 and slipping the sleeve 4 out.

I claim 1. A spray-gun comprising a pipe provided with an inlet connection; a valve headshell at one end of the pipe having an interior port disposed at an angle to the axis of the shell, and another interior port disposed at an angle to the first named port, the inner ends of both ports communicating with the bore of the pipe, and their outer ends communicating with the apertured cap, the outer end of the first named port lying nearer the cap than the outer end of the second port; and a reciprocative valve with? in the shell to control the communication of the outer ends of both ports with the apertured cap. I

2. A spray-gun comprising a pipe provided with an inlet connection; a valve headshell at one end of the pipe; an apertured tion of the outer ends of both port slotswith the apertured cap.

3. A spray-gun comprising a pipe provided with an inlet connection; a valve headshell at one end of the pipe havingan interior port disposed at an angle to the axis of the shell, and another interior portdisposed at an angle to and of greater capacity than the first named port, the inner ends of both ports communicating with the bore of the pipe, and their outer ends communicat ing with the apertured cap, the outer end of the first named port lying nearer the cap than the outer end of the second port; and a reciprocative valve within the shell to control the communication of the outer ends of both ports with theapertured cap.

4. A spray-gun comprising a pipe provided with an inlet connection; a valve headshell at one end of the pipe; an apertured cap on said head-shell; a valve-seat sleeve removably fitted and held within the headshell by the cap, said sleeve having a port slot disposed at an angle to the axis of the sleeve and another port slot disposed at an angle to and of greater width than the first named port slot, the inner ends of both port slots communicating with the bore of the pipe and their outer ends communicating with the apertured cap, the outer end of the first named port-slot lying nearer the cap than the outer end of the second port-slot; and a reciprocative valve within the sleeve to control the communication of the outer ends of both port slots with the apertured cap. d

5. A spray-gun comprising a pipe provided with an inlet connection; a valve headshell at one end of the pipe; anapertured cap on said head-shell; a valve-seat sleeve removably fitted and held within the headshell by the cap, said sleeve having in its wall a pair of oppositely disposed port slots disposed at an angle to the axis of the sleeve, and having also in its wall a pair-of oppositely disposed port slots disposed at an an-- gle opposite to the angle at Which the first named pair is disposed, the inner ends of all the port slots communicating With the bore of the pipe and their outer ends communicating with the apertured cap, the outer ends of the first named pair of port slots lying nearer the cap than the outer ends of the second named pair of portslots, said second-named palr of port slots having a greater Width than said first named pair; and a reciprocative valve Within the sleeve to control the communication of the outer ends of both pairs of port slots With the apertured cap.

In testimony whereof "I have signed my name to this specification in the presence of two subscribing Witnesses.

FREDERICK EDMUND CRUMMEY.

Witnesses:

JOHN D. GRUMMEY, A. I. TAFT.

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