US2538905A - Flushable nozzle - Google Patents

Description

Jan. 23, 1951 E. c. HORTON FLUSHABLE NOZZLE Filed March 1, 1947 INVENTOR Erw/h C. Harm/ BY Q M MVQMM.

ATTORNEY5 Patented Jan. 23, 1951 $9 a vwe c n system and 511 particularly-to an apparatus for washing thewindshield clean of vision obscuring matter whereby to maintain a clear field of vision through the :shield.{in arrangement of this 1 general class is now in use on the modern car, the same employing a small nozzle with a fine orifice through which the washing liquid is discharged onto the windshield. .In practice" this discharge orificeis quite small and therefore it-- will sometimes become clogged by impurities in the water as supplied by service station attendants.

The object of the present invention is to provide an arrangement of this character by which flow obscuring impurities may be readily flushed from the system. Again, the invention has for its object to provide a discharge unit of simple and economical design which will facilitate the mass production of the same.

The foregoing and other objects will manifest themselves as the following description progresses, reference being had to the accompanying drawing, wherein Fig. 1 is a schematic view illustrating a window washing system embodyin the present invention;

Fig. 2 is a fragmentary and greatly enlar ed view showing the discharge unit partily in section; and

Fig. 3 is a transverse section taken on line 3-3 of Fig. 2.

Referring more particularly to the drawing, the numeral I designates the windshield over which a wiper 2 is oscillated with anarm 3 by means of a shaft journaled in a cowl supported housing 4. These parts are of well-known construction since they form a part of the standard equipment of the modern automobile.

The shaft housing 4 is provided with a liquid discharging unit 5 which in turn is connected by a conduit 6 to a pump I. The pump may be of any approved form, such as that shown in the earlier Patent No. 2,142,056, and therefore may comprise a diaphragm 8 normally held at the end of its discharging stroke by a sprin 9. A pump is mounted on a liquid reservoir I 0 and has its diaphragm chamber connected by a conduit II to thejntake manifold I2, or some other suitable source of negative pressure. I3 arranged in the conduit II is operable to connect the pump to its source of vacuum so as to actuate @the liquid displacing member 8 against y of spring 9 for intaking a charge of the reservoir I0. Upon'jreleese of liquid A control valve UNITED-STATES PATENT OFFICE:

CnHorton, Hamburg," l T.- Y.,assignm'v to Trico Products CorporatiomBufiaIo, N. Y.

" f Applicaticn 1, 194 7; semi-N 731,773

' iaciarms. (org es-e59). H

fthe valve- Id'the diaphragm chamber containing apassage 6' extending between the throat I5 of the nozzle body and the conduit 6. The throat I5 opens into a chamber I6 from which the liquid will pass into a counterbored chamber I1 and out through an orifice I 8 which is positioned to direct a spray upwardly onto the windshield. The chamber I6 is internally threaded to receive a flushing valve l9. This valve is arranged to seat upon the rim 2!] in which the orifice I8 is cutso that when the valve is opened the orifice I8 will likewise be opened through the rim. A sealing gasket 2I may be interposed between the valve I9 and its seat as provided by the rim 20. The valve is formed with an anchoring stem or shank 22 externally threaded to adjustably engage the internal thread 23 in the chamber I6. The stem is straddle-milled to provide opposite flat faces 24 which serve, with the encircling chamber wall, to define fluid passages 25 as a means of communication between the inner end of the chamber I6 and the counterbored chamber I1. By reason of the position of the mountin shank in the nozzle body, this counterbored chamber is made ring shaped and therefore the jet orifice I 8 will have free communication about the shank and through the parallel passages 25 with the chamber I6.

In actual practice the entire length of the nozzle is approximately one-half of an inch and the diameter, is about one-fourth of an inch. It is therefore obvious that the discharge orifice will be quite minute in order to conserve the supply of liquid and to insure the issuing jet carrying upwardly into the path of the wiper 2, as indicated in Fig. 1. Consequently, the orifice may readily 'clog by impurities in the liquid. Howac ion will be; of limited duration since the pum grnt ill expel the predetermined vqllmlejf'. a predetermined pressur mafia 3 after the valve will be reset for the subsequent functioning of the system.

The invention is of simple construction and the parts are economically manufactured and assembled. In practice it has been found to be efiicient and practical, and while the foregoing description has been given in detail for ease of understanding it will become apparent that the inventive principles involved are capable of assuming other embodiments without departing from the spirit of the invention and the scope of the appended claims.

What is claimed is:

11A nozzle comprising a tubular internally threaded body having a laterally spaced annular chamber at its outer end, the lateral wall of the chamber being defined by a rim, a flushing valve normally seating on said rim to close the chamber therethrough and having a reduced mounting shank; said mounting shank bein spaced inwa'r'dly' of ';the rim and defining "the inner wall of the annular chamber and including a threaded portion for engagement with the internally threaded portion of said body to permit unseating of the valve from the rim, the latter being formed with a recess interrupting its surface and overhung by the 'sea'tedvalve "to define with the valve ;a "lateral discharge orifice, said shank having a flat face at one side for establishing communication throu h the body to the chamber, and said 39 chamber with the shank defining an annular passage establishing communication between the flat face and the discharge orifice.

2. The structure of claim 1 characterized in that a sealing gasket is interposed between the valve and rim, and one face of the sealing gasket defines the outer wall of the channel.

ERW IN C. .I-IORTON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Great Britain Oct. 14, .1921

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