US1731497A - Spray head - Google Patents

Description

Qct.- 15, 1929. 6,5. Mur-:LLER y 1,731,497

l SPRAY HEAD Filed Maren 14, 1927 Patented` Oct. 15, 1929 i J UNITED STA TES PATENT OFFICE GODFREY A MUELLERQOF POINT PLACE, OHIO, AssIGNOB, To THE Dnrvrmarss c0111- rmx, or TOLEDO, OHIO, A yconrorwTTIon Oromo SPRAY Hann application area march 14, 1927.4 'serial No. 175,126.

j This invention relates tospraying devices, and particularly to a spray-head for sprayguns,

\ the, application of Vpaint and other surface coating materials in both round and iattened or fan stream form.

The object efficient means, other than .the nozzle members of the spray-head, which is manually operable to Open or close the supplemental; jets'from which the stream Hattenlng air discharges.

"l The invention is fully described in the followingl specification and two embodiments `thereof illustrated in the' 4accompanying drawings, in which,

Figure 1 is a central longitudinal sectional view of a spray-head embodying the inven- 2v o` ftion with the valve' member partly broken Iaway. Fig. 42 isa front end elevation thereof. Fig. 3 is a side elevation of slightlymodl- 'fied form of spray-head with a`port1on 1n central longitudinal section and with the y valve member disposed interiorly ofthe outer nozzle. Fig. 4 is a front end elevation thereof, andv Fig. 5 is a cross-section on the 'line 5-5 in Fig. 3. y

Referring particularly to Figs. 1 and. 2'of the drawings, 1 u spray-head embodying the invention 'and 2 the outer nozzle. The inner nozzle, in the lpresent instance, has itsl forward end reduced and terminating in a small nipple 3 having a restricted axially disposed discharge orifice 4 therethrough, which communicates through the hollow interior of the nozzle member 1 v with a source of supply of thev material to be sprayed. The rear end portion of the nozzle 1 has an enlargement 5 adapted to be threaded at its rear end into a gun or holder body, or secured thereto in any'other suitable manner, as wellunderstood in the art.- The forward end of the enlargement 45 is shown as? terminating at the rear of the nozzle end in an annular forwardly facing shoulder forming an undercut or inner conical seating face 6, against which the rearend of the outer nozzle2 is adapted to seat and to which it may be releasably hel d by a union nut 7.

or'the like, used more particularly for' of the inventlon is the provision ina device of this character of simple and designates the inner nozzle of l The outer nozzle 2 is hollow or bored out to encircle the nozzle 1 in advance of-its enlargement 5 to formv an air space 8 therebel tween in communication through passages 9 in said enlargement with a suitably controlled air supply, as well understood in the art. The bore of the outer nozzle is reduced at its forward end to form a restricted main air discharge orifice 10,l which receives-the .nipple 3 of the inner nozzle and forms an annular discharge-passage therearound.

`The nozzle 2 is provided at its forward end with apair of forwardly projecting bosses 11, one at each of opposite sides of thel orifice 10 in transversely spaced relation thereto and each having its vinner side forming arcuate faces 12 of a common circle, concentric to ,the

nozzle orifices '4 and l0, or substantially so.

Each boss has a supplemental air discharge orifice 13 extending therethrough with its rear end in communication with the airspace 8 of the spray-head'and with its outer end opening through the arcuate face 12.of the boss and directed toward the axis line' of the nozzles, so thatl air discharged from the two supplemental passages 13 will meet at a point on said axial line, which is outwardly spaced a predetermined extent from the main discharge orificesl of the nozzles, thereby effecting a attening of the main material laden air stream, as well understood in the art.

`In order to control the discharge of air from the supplemental discharge passages 13, aring valve 14 is mounted between the bosses 11 in complimental seating engagement with the inner'r'arcuate faces 12 thereof and for turning movements relative thereto. This valve has diametrically opposed tapering portions 15, which, when the valve is in one position of its turning movement, completely close the discharge ends of the p'asasges 13,`

and when turned. inone ,directionl from such position, effect a gradual opening of the ypassagesto full open position, thus enabling the passages to be fully or partially opened, as desired, for operating purposes. The tapered portions 15 ofthe valve terminate abruptly at one end in inwardly extending shoulders so that the passages 13 may be quickly opened to full extent by turning the valve in a directate a grasping and turning of the same by the operator.

-While the` valve 14 is shown inuconnection with a particul-ar form of spray-head, it will be understood that the use of the invention isnot confined to any particularform or `f type of spray-head, so long as it may have provision for the between the discharge passages. i

In Figs. 3, 4 and v5 the invention is modified to showv the ring valve as mounted within the outer nozzle member instead of Without thesame, as in Figs. l and 2.- .In-this vform of the invention, and 21 designate theinner and outernozzle members, respectively,l

j with the aim-space 22 therebetween slightly enlarged over that shown in Fig.v 1 to facilitate-the mounting of the ring valve 23 Withg in said space. This ring valve, in the present instance, is shown as having a conical seat agalnst the inner surface of t-he outer lnozzle in closing relation to the inner ends of the supplemental air discharge passages 24 and having openings 25 therethrough adapted to be placed into orout of register with the inner ends of the passages 24 by aturning of the valve as is apparent. A stem 26 projects radially from the valve member through a side opening 27 in the outer nozzle 21 to facilitate a manual turning ofthe valve from without the nozzle.

It is evident that in both illustrative embodiments of the invention a unitary valve member for controlling both supplemental air discharge passages is employed; that said valve member is separate from both nozzles of the spray-head, and that it is removable relative thereto to effect an'opening, closing or regulation of the supplemental air jets from without the spray-head and without ef- -fe'cting the adjustment of one noz'zlen relative main orifice and forming mounting of the valve .14,y or one of similar type, c ends `ofi-the supplementalv air discharge osses at its forward end equidistantly spaced from said main orifice and each having an arcuate inner face concentric to the segments of a common circle, each of sai bossesalso vhaving a supplemental air discharge orifice opening through its conical face, and a ring valve disposed between and fitting said. arcuate aces and opera-ble to simultaneously open or close said supplemental passages.

2. In a spray-head, inner and outer discharge nozzles cooperating tov form a main air discharge orifice and having a space therebetween in communication with a source of ai'r pressure suppl said nozzles being relatively rotatable and said outer nozzle having supplemental air discharge passages,

and a single valve associated with the outer -passages and operable to simultaneously adjustablycontrol the discharge of air from the of the valve relative orifice andv having diametrically opposed l The valve v b supplemental passages by-rotary movements to the outer nozzle, the j axis of adjustment of said valvebeing longil tudinal with respect air discharge orifice.

In` testimony whereof I have hereunto signed my name to this specification.

GODFREY A. MUELLER.

to the axis of said main to the other, while such nozzles, at the same time, are capable of relative rotary adjustment to place the supplemental discharge jets in any position around the spray axis, as may be desired to flatten the main or material laden stream in a horizontal, vertical or other plane to suit the work being performed.

I wish it understood that the inventionis not limited to any particular construction,

arrangement or form of the parts, as it is' capable of numerous modifications and changes without departing from the spirit of the claims.

Having thus described my invention, what I claim as new and desire to secure'by Letters Patent is: l j

1. In a spray-head, an outer air discharge nozzle having a main central air discharge CERTIFICATE 0F CORRECTION.

Patent No. 1,731,497.y Granted October 15, 1929,`to

` GoDFREY A. MUELLER.

It is vhereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 2, line 94, claim 3, for the word "when" read "with"; and that the said Letters Patent should be read with this-correction therein that the same may conform to the record Iof the case in the Patent Office. i

Signed and sealed this 26th day of November, A. D. 1929.

M. J. Moore, (Seal) Acting Commissioner of Patents.

Images