US2574747A - Spray device - Google Patents

Description

C. E. M NUTT SPRAY DEVICE Nov. 13, 1951 Filed Sept. 11, 1946 PATENT OFFICE. v

I, 2f,-'574,747j- Y V IS ni't A-Y- EQVIGEQ i dlaailtilljlcltlutt, 'rt'ieao, Ohio 1 -Application' september 11, 1946, Serial No. 696,083

invention.relates:..to. the. conversion of a more or less. viscous liquid: into. a-ospray, especially: in.the delivery. thereof uniformly as a. fog over an area orintdaregion say of loose, hair on thd'iead of an individual.

This invention has utility when incorporated in a jetting nozzle unit, particularly as an aspirator-pf such symmetrical liquid withdrawal rate as to thoroughly nebulize theprojected Volume symmetrically/thruout the region of spread. The unit automatically retains these delivery characteristics, even for extended periods of discontinuous use, for the-impingingfluid supply-cutoflj l'acksliquid-suction capacityjfor any entrance whatev'eninto the pressure fiuid. discharge port. Eurthermorathe absenceoftheslift actionof the draft across theport bringing. the liquid thereto for atomization, has riser duct proportion thereto provid such downflow volumeat'release thatua meniscus is not developed across the fluid delivery port. o

Referring to the drawings:

Rig l isa side-elevation, with major portions brpkenaway, of anembodimlent of the invention in a lacquer handling unit Wh'ich may have s'pecial adaptation as an item of hair dressing equipment;

Fig. 2 is an enlarged vertical section thru the jet and nozzle assembly for the nebulizer feature of the disclosure in Fig. 1; and

Fig. 3 is a section on the line IIIIII, Fig. 2, before the liquid delivery nozzle is assembled with the jet fluid supply.

From a cylindrical base portion I a pressure air supply duct rises thru a flange collar 2 to an upwardly extending narrowing cross-section portion 3. At its upper end 4, the tapering section 5, has a radial or horizontally extending port or jet opening 5. In order better to centralize the spray means in a cup or flare chamber wall 6 having a bottom I, which may be adherently assembled with the flange 2, the taper tubular portion 3 has an ofiset or major slant side 8 with a seat 9 having a bottom key II]. An aspirator tube or passage section II uniformly tapering thruout its extent upward to a top nozzle or port I2, has a centering notch I3 at its lower end I4 to register with the key II]. Plastic weld or adhesive assembly is accordingly effective in predetermining definitely that tip I2 has a specific spacing from and is but slightly above the lower side line and thereby approaching pressure fiow impingement direction from the jet opening 5.

An endless seat I5 provides top bounds for the wall 6 in which is snugly fitted a base of a dome 'aoiaiiiis. (o1. 299L885) 2 Ifihaving a window opening II, which, at mm useintervals, may be closed by av cork or stopper I8.

An air pump or compressible downwardly liar ing bulb I9 has friction fitting portion 20'. to engage the tubular base I. Remote from the portion 20, the bulb I9 has assembled therewitha sleeve or tube 2I having, telescopic connection with the base I inward from and concentric with the portion 20. A fitting22 for the tube 2 I with the re-entrant central or axial region of the direct support or base portion of the bulb I9 is at an intake check valve. 23; upwardly from which may be deposited a cartridge or lozenge 24 of volatilizable matter, such as perfume, in the event of tonsorial usage. Furthermore, it may carry at as of disinfectant or antiseptic values. With the bulb I9 firmly grasped and squeezed, the port entrance or check valve 23 is closed, and the reduced air volume for the bulb I9' has such air passtherefrom thru ports 25 upward to be forc= ibly ejected at the opening 5 at a velocity of such suction-effecting force across the top of the nozzle I2, that hair treating lacquer 26 rises in the upwardly tapering liquid supply tube I I for dispersion into a spray or fog 21 in delivery outward thru the open window I'I.

With a bulb I9 in the range of 3" diameter and 5" tall, the duct I running about internal diameter, the jet opening 5 of around .076" diameter from a cross section region of the duct 3 of say .125" and the downward flare in the first inch of up to .187" diameter, there has been associated an aspirator. The nozzle of .058 diameter from a base inlet of .156" diameter had approximately /4" clearance from the bottom I of the vessel 6, I. Spaced 6" from a vertical fiat area, each compression of the bulb I9 will uniformly develop a mist or fog to define a pattern of oval shape 2 /2" high by 3" wide. Hair lacquer of an initial viscosity of 9 centipoise has such increased materially from the current use, due to volatilization therefrom. The vapor dispersion under the embodiment of the invention above specifically set forth is in the range of one tenth of a cubic centimeter for each pattern single bulb discharge. The spread is of extreme fineness for approximately doubling the field of effective spray use over current available acceptable market devices.

There is marked advantage in handling. The precise placement of the jet 5 as to the nozzle I2,

is a factor in maintaining a good spread regular blowings from the jet 5, there is not suction sufiicient to draw liquid thereinto from the nozzle I2.

Furthermore, the tube H cross section increase away from the opening l2 has the downpull liquid 4 y v r I p 1. A spray device comprising a central tubul duct, a cup about said duct, said duct having a truncated cylindrical portion provided with a lateral port near the upper end thereof and located approximately at the duct axis, and an aspirator member provided with a passage section having an open bottom for normal submergence in a relatively viscous liquid in said cup and having an open aspirator tip adjacent said lateral port in said duct for pressure flow impingement from said port, said passage section having a continuously increasing cross-section throughout its length from said tip to said open bottom, said aspirator member being attached adjacent said open bottom to said duct and positioned adjacent said truncated portion of said duct, whereby said volume therein effective against any surface tension or film meniscus bridging.

From the foregoing, it is apparent that for normal operation, the unit herein disclosed is selfcleaning, at least to a normally functioning or operative extent. However, in practice, there may be occasion, as for changing the liquid or solution being handled. The ready removal'of the dome l6 exposes the vessel 6, I, and the tube, from the nozzle i2 for swabbing and rinsing; Disconnection of the unit (Fig. 2), which may be of plastic, from the bulb and sleeve or stem 2|, opens the taper portion 3 for thoro cleaning service.

For beauty parlor work, the device is a complete one-hand operable spray, which may be directed, say about the scalp or thru the loose hair of one requiring service. While the effective localizing of the liquid to its supply and nozzle discharge as nebulized, gives the invention embodiment special value for hair dressing use of lacquers, the liquid to be dispersed may be changed to meet other occasions for spraying. Disinfectants, insecticides, and even impregnating or coating substances may be readily applied. Instead of the grip actuated hand pump, continuous pressure supply may be had with a valve control.

What is claimed and it is desired to secure by Letters Patent is:

passage section diminishes capillary flow of the liquid from said cup through said passage section so that the disturbance of the operation of said device due to the viscosity of the liquid is minimized.

2. The device of claim 1 including a pressure supply means, comprising a collapsible bulbsur: rounding said duct and connected thereto, and an intake check valve located inside said duct.

CLARA E. MCNUTTL",

REFERENCES CITED The following references are of record inth file of this patent: v

UNITED STATES PATENTS "I Number Name Date 736,157 Sams Aug. 11.1903 824.471 Eggers June 26,1906 1,263,079 Le'on Apr. 16,1918 1,740,373 Shaukis 'Dec, 17,51,929 1,839,193 Blanchard Jan..5,,1932 2,209,261 Eicken July 23, 1940 2,421,359 Sutherland May 2'7, 1947 FOREIGN PATENTS W Number Country Date 72,115 Switzerland Mar. 15 1915 183,599 Switzerland July 1, 1936 198,270

Switzerland June 15,1930

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